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Salazar Rios AL, Kesterke MJ, Pylant GD, Barmak AB, Kontogiorgos ED, Revilla-León M. Effect of print orientation, storage conditions, and storage time on intaglio surface accuracy of implant surgical guides fabricated by using a stereolithography technology. J Prosthet Dent 2023:S0022-3913(23)00552-8. [PMID: 37778941 DOI: 10.1016/j.prosdent.2023.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/14/2023] [Accepted: 08/16/2023] [Indexed: 10/03/2023]
Abstract
STATEMENT OF PROBLEM The accuracy of printed implant surgical guides can be affected by different factors that negatively impact the planned implant position. How print orientation, storage time, and conditions influence manufacturing accuracy remains uncertain. PURPOSE The purpose of this in vitro study was to evaluate the influence of print orientation, storage conditions, and storage time on the intaglio surface accuracy of implant surgical guides manufactured by using a stereolithography (SLA) printer. MATERIAL AND METHODS A tooth-supported maxillary implant surgical guide design (control file) was used to fabricate the specimens (N=40, n=10). Four groups were created based on the print orientation used: 0 (Group 0), 45 (Group 45), 70 (Group 70), and 90 degrees (Group 90). The specimens were fabricated using an SLA printer (Form 3B+) and a biocompatible dental resin (Surgical Guide Resin V1) following the manufacturer's recommended protocol. Each group was divided into 2 subgroups based on the storage conditions: light (L subgroup) and dark (D subgroup) settings. Each specimen was digitized by using a desktop scanner (Medit T710) at days 0, 1, 7, and 14. The control file and each digitized specimen were superimposed by using the best-fit technique with a metrology program (Geomagic Control X). The root mean square (RMS) error was used to calculate the discrepancies between the control files and specimen files. Three-way ANOVA and pairwise comparison Tukey tests were used to analyze trueness. The Levene test was used to assess precision (α=.05). RESULTS Significant trueness discrepancies were found among the groups tested (P<.001), but no significant differences were found among the subgroups (P=.100) and the storage times analyzed (P=.609). Additionally, the Tukey test showed significant RMS error mean value discrepancies between Group 0 and Group 45 (P<.001), Group 0 and Group 90 (P<.001), Group 45 and Group 70 (P<.001), and Group 70 and Group 90 (P<.001). The Levene test revealed significant SD discrepancies among the groups tested (P<.05). CONCLUSIONS The trueness and precision of the intaglio surface of the implant surgical guides manufactured by using the printer and material tested were affected by the print orientation. However, storage conditions over a 14-day period did not impact the intaglio accuracy of the specimens.
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Affiliation(s)
- Alma L Salazar Rios
- Graduate student, Graduate Program in Prosthodontics, Comprehensive Dentistry Department, School of Dentistry, Texas A&M University, Dallas, Texas
| | - Matthew J Kesterke
- Assistant Professor, Department of Orthodontics, School of Dentistry, Texas A&M University, Dallas, Texas
| | - George D Pylant
- Adjunct Professor, Department of Periodontics, School of Dentistry, Texas A&M University, Dallas, Texas
| | - Abdul B Barmak
- Associate Professor, Clinical Research and Biostatistics, Eastman Institute of Oral Health, University of Rochester Medical Center, Rochester, NY
| | - Elias D Kontogiorgos
- Clinical Professor and Director, Graduate Program in Prosthodontics, Comprehensive Dentistry Department, School of Dentistry, Texas A&M University, Dallas, Texas
| | - Marta Revilla-León
- Affiliate Assistant Professor, Graduate Prosthodontics, Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Wash; Faculty and Director of Research and Digital Dentistry, Kois Center, Seattle, Wash; Adjunct Professor, Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, Mass..
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Bihn SK, Son K, Son YT, Dahal RH, Kim S, Kim J, Hwang JH, Kwon SM, Lee JH, Kim HD, Lee JM, Jin MU, Lee KB. In Vitro Biofilm Formation on Zirconia Implant Surfaces Treated with Femtosecond and Nanosecond Lasers. J Funct Biomater 2023; 14:486. [PMID: 37888151 PMCID: PMC10607745 DOI: 10.3390/jfb14100486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/18/2023] [Accepted: 09/21/2023] [Indexed: 10/28/2023] Open
Abstract
(1) Background: The purpose of this study was to evaluate how a zirconia implant surface treated with laser technology affects the degree of biofilm formation. (2) Methods: Experimental titanium (Ti) disks were produced that were sandblasted with large grit and acid-etched (T), and they were compared with zirconia (ZrO2) discs with a machined (M) surface topography; a hydrophilic surface topography with a femtosecond laser (HF); and a hydrophobic surface topography with a nanosecond laser (HN) (N = 12 per surface group). An in vitro three-species biofilm sample (Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Prevotella intermedia (Pi)) was applied to each disc type, and bacterial adhesion was assessed after 48 and 72 h of incubation using an anaerobic flow chamber model. Statistical significance was determined using the Kruskal-Wallis H test, with Bonferroni correction used for the post-hoc test (α = 0.05). (3) Results: Compared to the T group, the M group exhibited more than twice as many viable bacterial counts in the three-species biofilm samples (p < 0.05). In comparison to the T group, the HF group had significantly higher viable bacterial counts in certain biofilm samples at 48 h (Aa and Pi) and 72 h (Pi) (p < 0.05). The HN group had higher viable bacterial counts in Pi at 48 h (5400 CFU/mL, p < 0.05) than the T group (4500 CFU/mL), while showing significantly lower viable bacterial counts in Pg at both 48 (3010 CFU/mL) and 72 h (3190 CFU/mL) (p < 0.05). (4) Conclusions: The surface treatment method for zirconia discs greatly influences biofilm formation. Notably, hydrophobic surface treatment using a nanosecond laser was particularly effective at inhibiting Pg growth.
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Affiliation(s)
- Soo Kyum Bihn
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu 41940, Republic of Korea;
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, Daegu 41940, Republic of Korea; (K.S.); (Y.-T.S.)
| | - Keunbada Son
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, Daegu 41940, Republic of Korea; (K.S.); (Y.-T.S.)
| | - Young-Tak Son
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, Daegu 41940, Republic of Korea; (K.S.); (Y.-T.S.)
- Department of Dental Science, Graduate School, Kyungpook National University, Daegu 41940, Republic of Korea
| | - Ram Hari Dahal
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea; (R.H.D.); (S.K.); (J.K.)
| | - Shukho Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea; (R.H.D.); (S.K.); (J.K.)
| | - Jungmin Kim
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea; (R.H.D.); (S.K.); (J.K.)
| | - Jun Ho Hwang
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Republic of Korea; (J.H.H.); (S.-M.K.); (J.H.L.)
| | - Sung-Min Kwon
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Republic of Korea; (J.H.H.); (S.-M.K.); (J.H.L.)
| | - Jong Hoon Lee
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Republic of Korea; (J.H.H.); (S.-M.K.); (J.H.L.)
| | - Hyun Deok Kim
- School of Electronics Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;
| | - Jae-Mok Lee
- Department of Periodontology, School of Dentistry, Kyungpook National University, Daegu 41940, Republic of Korea;
| | - Myoung-Uk Jin
- Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu 41940, Republic of Korea
| | - Kyu-Bok Lee
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu 41940, Republic of Korea;
- Advanced Dental Device Development Institute (A3DI), Kyungpook National University, Daegu 41940, Republic of Korea; (K.S.); (Y.-T.S.)
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Traver-Méndez V, Camps-Font O, Ventura F, Nicolau-Sansó MA, Subirà-Pifarré C, Figueiredo R, Valmaseda-Castellón E. In Vitro Characterization of an Anodized Surface of a Dental Implant Collar and Dental Abutment on Peri-Implant Cellular Response. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6012. [PMID: 37687706 PMCID: PMC10489139 DOI: 10.3390/ma16176012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 09/10/2023]
Abstract
The purpose of this paper was to determine the effect of anodization on the in vitro proliferation and adhesion of immortalized human keratinocytes (HaCats) and mouse bone marrow-derived mesenchymal stem cells (BM-MSCs) in Titanium Grade 23 (Ti6Al4V ELI) discs and to describe the surface topography, roughness, and composition of dental implants (body and collar) and abutments submitted to an area-specific anodization process. HaCat cells and BM-MSCs were seeded onto discs with three different surface treatments: machined, area-specific anodization for abutments, and area-specific anodization for implant collars. Cell proliferation was assessed using a resazurin-based fluorescent dye on days 1, 3, and 7, while cell adhesion was examined using scanning electron microscopy (SEM). Surface topography, roughness, and composition were evaluated for six implant bodies with an anodized rough surface, six anodized implant smooth collars, and six anodized prosthetic abutments. Both HaCats and BM-MSCs showed increased viability over time (p < 0.001) with no statistically significant differences among the different surfaces (p = 0.447 HaCats and p = 0.631 BM-MSCs). SEM analysis revealed an enhanced presence and adhesion of HaCat cells on the anodized surface for the implant collars and an increased adhesion of BM-MSCs on both the anodized and machined surface abutments. The topography characteristics of the treated implants and abutments varied depending on the specific implant region. Chemical analysis confirmed the presence of oxygen, calcium, phosphorus, and sodium on the anodized surfaces. The area-specific anodization process can be utilized to create variable topography, increase the specific surface area, and introduce oxygen, calcium, phosphorus, and sodium to dental implants and abutments. While BM-MSCs and HaCat cells showed similar adhesion and proliferation on anodized and machined surfaces, a positive interaction between anodized Ti6Al4V ELI surfaces and these two cell lines present in the peri-implant mucosa was observed. Due to the limitations of the present study, further research is necessary to confirm these findings.
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Affiliation(s)
- Valeria Traver-Méndez
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
| | - Octavi Camps-Font
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
| | - Francesc Ventura
- Department of Physiological Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain;
| | - Miquel Angel Nicolau-Sansó
- Adult Comprehensive Dentistry, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain;
| | - Carles Subirà-Pifarré
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
- Adult Comprehensive Dentistry, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain;
| | - Rui Figueiredo
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
| | - Eduard Valmaseda-Castellón
- Oral Surgery and Implantology, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Spain; (V.T.-M.); (R.F.); (E.V.-C.)
- IDIBELL Institute, 08907 L’Hospitalet de Llobregat, Spain;
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Gopi A, Edwin A. A multicentric study to evaluate the treatment outcome and complications after oral rehabilitation with implant-supported hybrid prostheses. Med J Armed Forces India 2023; 79:551-559. [PMID: 37719903 PMCID: PMC10499642 DOI: 10.1016/j.mjafi.2021.06.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 06/15/2021] [Indexed: 10/20/2022] Open
Abstract
Background As a newer modality of rehabilitation of completely edentulous patients, there is no conclusive evidence on which of the variants of hybrid prosthesis, namely acrylic teeth on a metal substructure or porcelain fused to metal teeth over on a metal substructure, is better in terms of treatment outcome, reduced mechanical complications, and better patient compliance. Methods Sixteen completely edentulous patients, both male and female, were selected from the OPD of the study centers during the study period. Group A: Eight patients rehabilitated by maxillary and mandibular hybrid prosthesis using a substructure of metal covered by acrylic teeth, which was screwed on the implants. Group B: Eight patients rehabilitated by maxillary and mandibular hybrid prosthesis using a substructure of metal covered by porcelain fused to metal teeth, which was screwed on implants. The patients were recalled at 3 months, 6 months, and 1 year following rehabilitation, and necessary clinical and radiological observations were made to evaluate the overall health and complications. Oral health-related quality of life was measured using the Oral Health Impact Profile (OHIP)-EDENT questionnaire before treatment and after rehabilitation. The same methodology, clinical procedures, and evaluation criteria were followed in all the study centers. The data obtained were then compiled and analyzed. Results None of the patients in group A or B showed any signs of need to remake. There was no statistically significant difference in proportions of cases showing signs of loosening of components, soft tissue overgrowth, breakage of acrylic, chipping of porcelain, and wear of teeth in both the groups. The amount of screw loosening, wear of prosthetic superstructure, and bone loss around implants were less (even though not statistically significant) in group A. Both the groups showed satisfactory esthetics. OHIP- EDENT evaluation gave completely satisfactory report after rehabilitation in both groups. Conclusion Both the types of complete rehabilitation, hybrid prosthesis of acrylic teeth on a metal substructure and hybrid prosthesis of porcelain fused to metal teeth on a metal substructure were successful and comparably reliable.
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Affiliation(s)
- Anup Gopi
- DO & Classified Specialist (Prosthodontics), Army Dental Center (R&R), New Delhi, India
| | - A. Edwin
- DO & Graded Specialist (Prosthodontics), AFDC, New Delhi, India
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Roehling S, Gahlert M, Bacevic M, Woelfler H, Laleman I. Clinical and radiographic outcomes of zirconia dental implants-A systematic review and meta-analysis. Clin Oral Implants Res 2023; 34 Suppl 26:112-124. [PMID: 37750521 DOI: 10.1111/clr.14133] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/28/2023] [Accepted: 07/03/2023] [Indexed: 09/27/2023]
Abstract
OBJECTIVES For the present review, the following focused question was addressed: In patients with root-analog dental implants, what is the effect of implants made of other materials than titanium (alloy) on implant survival, marginal bone loss (MBL), and technical and biological complications after at least 5 years. MATERIALS AND METHODS An electronic (Medline, Embase, Web of Science) search was performed to identify observational clinical studies published from January 2000 investigating a minimum of 20 commercially available zirconia implants with a mean follow-up of at least 60 months. Primary outcome was implant survival, secondary outcomes included peri-implant MBL, probing depths (PDs), and technical and biological complications. Meta-analyses were performed to evaluate implant survival, MBL, and PD. RESULTS From 5129 titles, 580 abstracts were selected, and 111 full-text articles were screened. Finally, 4 prospective and 2 retrospective observational clinical cohort studies were included for data extraction. Meta-analyses estimated after 5 years of loading mean values of 97.2% (95% CI 94.7-99.1) for survival (277 implants, 221 patients), 1.1 mm (95% CI: 0.9-1.3) for MBL (229 implants, 173 patients), and 3.0 mm (95% CI 2.5-3.4) for PDs (231 implants, 175 patients). CONCLUSIONS After 5 years, commercially available zirconia implants showed reliable clinical performance based on survival rates, MBL, and PD values. However, more well-designed prospective clinical studies and randomized clinical trials investigating titanium and zirconia implants are needed to confirm the presently evaluated promising outcomes.
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Affiliation(s)
- S Roehling
- Clinic for Oral and Cranio-Maxillofacial Surgery, Hightech Research Center, University Hospital Basel, University of Basel, Basel, Switzerland
- Clinic for Oral and Cranio-Maxillofacial Surgery, Kantonsspital Aarau, Aarau, Switzerland
- Private Dental Clinic PD Dr. Gahlert & PD Dr. Roehling, Munich, Germany
| | - M Gahlert
- Clinic for Oral and Cranio-Maxillofacial Surgery, Hightech Research Center, University Hospital Basel, University of Basel, Basel, Switzerland
- Private Dental Clinic PD Dr. Gahlert & PD Dr. Roehling, Munich, Germany
- Sigmund Freud Private University, Vienna, Austria
| | - M Bacevic
- Department of Periodontology and Oral Surgery, Faculty of Medicine, University of Liège, Liège, Belgium
- Centre for Oral Clinical Research, Institute of Dentistry, London, UK
- Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
| | | | - I Laleman
- Department of Periodontology and Oral Surgery, Faculty of Medicine, University of Liège, Liège, Belgium
- Dental Biomaterials Research Unit (d-BRU), Faculty of Medicine, University of Liège, Liège, Belgium
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Lee SJ, Alamri O, Cao H, Wang Y, Gallucci GO, Lee JD. Occlusion as a predisposing factor for peri-implant disease: A review article. Clin Implant Dent Relat Res 2023; 25:734-742. [PMID: 36373771 DOI: 10.1111/cid.13152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/23/2022] [Accepted: 10/25/2022] [Indexed: 08/04/2023]
Abstract
BACKGROUND The restoration of dental implants presents a unique challenge due to the intrinsic biomechanical differences between osseointegrated implants and natural teeth, and their subsequent responses to occlusal loading. However, controversy exists regarding the role that occlusion plays in the physiology of the peri-implant complex. PURPOSE To provide an overview of the scientific literature regarding occlusion as it relates to implant dentistry and peri-implant disease. MATERIALS AND METHODS This article presents a narrative review on occlusal loading and its potential effects on the peri-implant complex, as well as some generally accepted guidelines for occlusion in implant dentistry. RESULTS AND CONCLUSIONS Although there is strong evidence linking occlusal factors to mechanical complications of dental implants, the same cannot be said regarding biological complications. There is no clear scientific evidence on the relationship between occlusal overload and peri-implant disease. However, occlusal overload may be an accelerating factor for peri-implant disease in the presence of inflammation. As the biomechanical properties of dental implants differ from that of the natural dentition, modifications to classic concepts of occlusion may be necessary when dental implants are involved. Thus, clinical recommendations are proposed which function to minimize unfavorable occlusal forces on implant restorations and reduce the associated biological and mechanical complications.
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Affiliation(s)
- Sang J Lee
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Osamah Alamri
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Huilin Cao
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Yujun Wang
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - German O Gallucci
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Jason D Lee
- Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, Massachusetts, USA
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Kim MJ, Cho WT, Hwang SH, Bae JH, Bae EB, Shim JS, Kim JE, Jeong CM, Huh JB. A prospective multicenter clinical study on the efficiency of detachable ball- and spring-retained implant prosthesis. J Adv Prosthodont 2023; 15:202-213. [PMID: 37662852 PMCID: PMC10471505 DOI: 10.4047/jap.2023.15.4.202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/01/2023] [Accepted: 08/21/2023] [Indexed: 09/05/2023] Open
Abstract
PURPOSE This prospective clinical study was conducted to evaluate the clinical usefulness of the freely detachable zirconia ball- and spring-retained implant prosthesis (BSRP) through a comparative analysis of screw- and cement-retained implant prosthesis (SCRP). MATERIALS AND METHODS A multi-center, randomized, prospective clinical study evaluating the clinical usefulness of the detachable zirconia ball- and spring-retained implant prostheses was conducted. Sixty-four implant prostheses in 64 patients were examined. Periodic observational studies were conducted at 0, 3, 6, and 12 months after delivery of the implant prosthesis. Factors such as implant success rate, marginal bone resorption, periodontal pocket depth, plaque and bleeding index, and prosthetic complications were evaluated, respectively. RESULTS During the 1-year observation period, all implants survived without functional problems and clinical mobility, showing a 100% implant success rate. Marginal bone resorption was significantly higher in the SCRP group than in the BSRP group only at the time of implant prosthesis delivery (P = .043). In all observation periods, periodontal pocket depth was slightly higher in the BSRP group than in the SCRP group, but there was no significant difference (P > .05). The modified plaque index (mPI) scores of both groups were moderate. Higher ratio of a score 2 in modified sulcus bleeding index (mBI) was observed in the BSRP group in the 6- and 12-months observation. CONCLUSION Within the limitations of this study, the newly developed zirconia ball- and spring-retained implant prosthesis could be considered as an applicable and predictable treatment method along with the existing screw- and cement-retained prosthesis.
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Affiliation(s)
- Min-Jung Kim
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Won-Tak Cho
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Su-Hyun Hwang
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Ji-Hyeon Bae
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Eun-Bin Bae
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
- The Shapiro Family Laboratory of Viral Oncology and Aging Research & Section of Restorative Dentistry, UCLA School of Dentistry, Los Angeles, CA, USA
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Chang-Mo Jeong
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Jung-Bo Huh
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
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Ju C, Lee Y, Hong SJ, Song SJ, Choi Y, Cho E, Paek J. Risk factors associated with screw loosening in CAD-CAM custom abutments: A 6-year retrospective study. J Prosthet Dent 2023:S0022-3913(23)00369-4. [PMID: 37507308 DOI: 10.1016/j.prosdent.2023.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 05/28/2023] [Accepted: 05/31/2023] [Indexed: 07/30/2023]
Abstract
STATEMENT OF PROBLEM Custom abutments made by using computer-aided design and computer-aided manufacturing (CAD-CAM) are often used for implant-supported prostheses. However, studies on screw loosening of implant prostheses using custom abutments are lacking. PURPOSE The purpose of this retrospective study was to investigate the risk factors of screw loosening in implant-supported prostheses using custom abutments made with CAD-CAM. MATERIAL AND METHODS Clinical charts, radiographic images, and CAD custom abutment design file data were collected and analyzed retrospectively. The study included 255 patients with 401 dental implants, and the follow-up duration was 6 years. Age, sex (male/female), type of unit (single-unit or multiunit), location of the implant (maxilla or mandible and anterior, premolar, or molar tooth), type of antagonist, and experience of the prosthodontist were reviewed, and implant angulation (mesiodistal and buccolingual), location of the screw access hole (mesiodistal and buccolingual distances from center), and attrition status (none, localized, or generalized) were measured by using a CAD file. The frequencies and percentages of risk factors were evaluated with the Fisher exact test, and the Bonferroni correction was used as a post hoc test. Multiple logistic regression with the Firth method was performed to calculate the odds ratios and their confidence intervals (α=.05). RESULTS Screw loosening showed a correlation with the severity of attrition (P<.001). Single-unit prostheses had a higher risk of screw loosening than multiunit prostheses (P<.001). Experience of the prosthodontist (P<.001). Buccolingual angulation of the implant and abutment significantly influenced the incidence of screw loosening (P<.05). Age, sex, location of the implant, type of antagonist, mesiodistal implant angulation, and buccolingual and mesiodistal location of the screw access hole did not significantly influence the incidence of screw loosening (P>.05). CONCLUSIONS The degree of attrition, buccolingual angulation of the implant and abutment, type of unit, and experience of the prosthodontist (>3 years or <3 years) were risk factors in the incidence of screw loosening.
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Affiliation(s)
- Changmin Ju
- Graduate student, Department of Prosthodontics, Graduate School, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Younghoo Lee
- Clinical Assistant Professor, Department of Prosthodontics, Kyung Hee University Dental Hospital, Seoul, Republic of Korea
| | - Seoung-Jin Hong
- Assistant Professor, College of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Seung Jun Song
- Assistant Professor, College of Dental Medicine, Columbia University, New York, NY
| | - Youngkyun Choi
- Graduate student, Department of Prosthodontics, Graduate School, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Eunhan Cho
- Graduate student, Department of Prosthodontics, Graduate School, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Janghyun Paek
- Associate Professor, Department of Prosthodontics, College of Dentistry, Kyung Hee University, Seoul, Republic of Korea.
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Pla R, Sanz-Esporrin J, Noguerol F, Vignoletti F, Gamarra P, Sanz M. A Synthetic Bio-Absorbable Membrane in Guided Bone Regeneration in Dehiscence-Type Defects: An Experimental In Vivo Investigation in Dogs. Bioengineering (Basel) 2023; 10:841. [PMID: 37508867 PMCID: PMC10376221 DOI: 10.3390/bioengineering10070841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/15/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
This study aimed to determine the performance and characteristics of a synthetic barrier membrane of polylactic acid and acetyl butyl citrate (PLAB) for the lateral bone augmentation of peri-implant dehiscence defects (mean height × depth = 3 mm × 1 mm). In eight dogs, three treatment groups were randomly allocated at each chronic peri-implant dehiscence-type defect: (i) a deproteinized bovine bone mineral covered by a synthetic barrier membrane (test group), (ii) a deproteinized bovine bone mineral covered by a natural collagen membrane (positive control), and (iii) a synthetic barrier membrane (negative control). After 4 and 12 weeks of submerged healing, dissected tissue blocks were processed for calcified and decalcified histological analysis. Histometric measurements for tissue and bone width were performed, and bone-to-implant contact and alkaline phosphatase expression where measured. After 4 and 12 weeks of healing, no statistical differences between the groups were observed for the histometric measurements. The expression of alkaline phosphatase was higher in the positive control group after 4 weeks followed by the positive and negative controls (5.25 ± 4.09, 4.46 ± 3.03, and 4.35 ± 2.28%, p > 0.05) and 12 weeks followed by the negative and positive controls (4.3 ± 2.14, 3.21 ± 1.53, and 2.39 ± 1.03%, p > 0.05). Concerning the bone-to-implant contact, after 4 weeks, the test group obtained the highest results (39.54 ± 48.7) vs. (31.24 ± 42.6) and (20.23 ± 36.1), respectively, while after 12 weeks, the positive control group obtained the highest Bone to imaplant contact (BIC) results, followed by the test and negative controls, (35.91 ± 24.9) vs. (18.41 ± 20.5) and (24.3 ± 32.1), respectively; no statistically significant differences were obtained. Within the limitations of the study, new bone formation can be achieved in guided bone regeneration procedures simultaneously with implant placement either with the use of a PLAB membrane or a native collagen membrane, although these differences were not statistically significant.
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Affiliation(s)
- Rafael Pla
- Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
| | - Javier Sanz-Esporrin
- Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
| | - Fernando Noguerol
- Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
| | - Fabio Vignoletti
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
| | - Pablo Gamarra
- Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
| | - Mariano Sanz
- Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, Faculty of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain
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Tomina DC, Petruțiu ȘA, Crișan B, Leucuța DC, Dinu CM. Influence of Periodontal Status and Prosthetic Treatment on Survival and Success Rates in Implant Therapy: A 5-Year Retrospective Follow-Up Study. J Clin Med 2023; 12:4275. [PMID: 37445310 DOI: 10.3390/jcm12134275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/30/2023] [Accepted: 06/24/2023] [Indexed: 07/15/2023] Open
Abstract
The objective of the present study was to evaluate the 5-year outcome of dental implant therapy and assess the survival, success, and biological and technical complications. A periodontal and prosthetic-oriented evaluation was conducted on the variables that can influence the long-term predictability of implant therapy. A total of 615 patients and 1427 dental implants from a private clinic (MedArtis Dent, Cluj-Napoca, Romania) were enrolled in the study. The study was a longitudinal cohort with data collected retrospectively from physical/digital dental records in combination with a cross-sectional clinical/radiological examination. Results showed that periodontal diagnosis at baseline had a significant impact on the marginal bone loss prediction. Data showed that the cylindrical implant with an internal 45° medium taper connection experienced a higher rate of bone resorption compared to the tapered implant with the 5° internal connection. Screw-retained restorations and overdentures showed a statistical decrease in the marginal bone level height when compared to the cemented restorations. Data from our study suggest that not only is there a powerful association between recall visits and the rate of complications in dental implant treatment, but a lack of professional maintenance predicts a higher bone level loss during the 5-year interval.
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Affiliation(s)
- Darius Cătălin Tomina
- Department of Periodontology, Faculty of Dentistry, University of Medicine and Pharmacy Iuliu Hațieganu, 400012 Cluj-Napoca, Romania
- MedArtis Dent Private Dental Clinic, 400130 Cluj-Napoca, Romania
| | - Ștefan Adrian Petruțiu
- Department of Periodontology, Faculty of Dentistry, University of Medicine and Pharmacy Iuliu Hațieganu, 400012 Cluj-Napoca, Romania
- MedArtis Dent Private Dental Clinic, 400130 Cluj-Napoca, Romania
| | - Bogdan Crișan
- MedArtis Dent Private Dental Clinic, 400130 Cluj-Napoca, Romania
- Department of Maxillofacial Surgery and Implantology, Faculty of Dentistry, University of Medicine and Pharmacy Iuliu Hațieganu, 400012 Cluj-Napoca, Romania
| | - Daniel-Corneliu Leucuța
- Department of Medical Informatics and Biostatistics, Iuliu Hatieganu University of Medicine and Pharmacy, 400349 Cluj-Napoca, Romania
| | - Cristian Mihail Dinu
- MedArtis Dent Private Dental Clinic, 400130 Cluj-Napoca, Romania
- Department of Oral and Cranio-Maxillofacial Surgery, Faculty of Dentistry, University of Medicine and Pharmacy Iuliu Hațieganu, 400012 Cluj-Napoca, Romania
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Martins RG, Castro TSD, Dib LL, Gehrke SA, Mesquita AMM. Influence of Restorative Material on the Distribution of Loads to the Bone in Hybrid Abutment Crowns-In Vitro Study. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1188. [PMID: 37512000 PMCID: PMC10384236 DOI: 10.3390/medicina59071188] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 07/30/2023]
Abstract
Background: The objective of this study was to evaluate the load transmitted to the peri-implant bone by seven different restorative materials in single-unit rehabilitations with morse taper implants using a strain gauge. Materials: In a polyurethane block that simulated type III bone, a morse taper platform implant was installed (3.5 × 11 mm) in the center and 1 mm below the test base surface, and four strain gauges were installed around the implant, simulating the mesial, distal, buccal and lingual positions. Seven similar hybrid abutment crowns were crafted to simulate a lower premolar using different materials: 1-PMMA; 2-glass ceramic over resin matrix; 3-PEEK + lithium disilicate; 4-metal-ceramic; 5-lithium disilicate; 6-zirconia + feldspathic; 7-monolithic zirconia. All groups underwent axial and oblique loads (45 degrees) of 150 N from a universal testing machine. Five measurements (n = 5) were performed with each material and for each load type; the microdeformation data underwent statistical analysis. The data were obtained in microdeformation (με), and the significance level was set at p ≤ 0.05. Results: There was no statistically significant difference in the evaluation among the materials under either the axial load or the oblique load at 45 degrees. In turn, in the comparison between axial load and oblique load, there was a difference in load for all materials. Conclusion: The restorative material did not influence the load transmitted to the bone. Furthermore, the load transmitted to the bone was greater when it occurred obliquely at 45° regardless of the material used. In conclusion, it appeared that the different elastic modulus of each material did not influence the load transmission to the peri-implant bone.
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Affiliation(s)
| | | | - Luciano Lauria Dib
- Department of Implantology, Paulista University-UNIP, São Paulo 04026-002, Brazil
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Tajti P, Solyom E, Czumbel LM, Szabó B, Fazekas R, Németh O, Hermann P, Gerber G, Hegyi P, Mikulás K. Monolithic zirconia as a valid alternative to metal-ceramic for implant-supported single crowns in the posterior region: A systematic review and meta-analysis of randomized controlled trials. J Prosthet Dent 2023:S0022-3913(23)00336-0. [PMID: 37349158 DOI: 10.1016/j.prosdent.2023.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 06/24/2023]
Abstract
STATEMENT OF PROBLEM Technical complication rates of standard metal-ceramic implant-supported posterior restorations are relatively high. Whether monolithic zirconia crowns represent a more successful alternative is unclear. PURPOSE The purpose of this systematic review and meta-analysis was to compare the clinical outcomes of posterior monolithic zirconia and metal-ceramic implant-supported single crowns. MATERIAL AND METHODS A search was conducted in MEDLINE, Scopus, Embase, Web of Science, and CENTRAL databases for randomized controlled trials up to April 2023 with a follow-up time of at least 1 year. Restoration and implant survival and failure rates, marginal bone loss (MBL), bleeding on probing (BOP), and technical complications were analyzed by 2 reviewers. Statistical analyses were conducted using the R-statistics software program. The risk of bias was assessed by the Cochrane Risk of Bias Tool 2 (RoB 2), and the certainty of evidence by the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach. RESULTS A total of 11 out of 2030 records were identified by title and abstract, and 4 records were included after full-text analysis. The statistical analysis revealed no significant difference in MBL (MD -0.11, 95% CI: [-0.25; 0.03]), BOP (OR 0.66, 95% CI: [0.25; 1.77]), or implant failure (OR 1.30, 95% CI: [0.24; 7.08]). Monolithic zirconia presented significantly less chipping over 1 year (OR 0.17, 95% CI: [0.03; 0.99]). The chipping rate was 0% for monolithic zirconia and 7.61% for metal-ceramic. Based on a narrative review, the restoration survival rate was 97.5% in the monolithic zirconia group and 99.1% in the metal-ceramic group. CONCLUSIONS Monolithic zirconia showed favorable short-term survival rates and had significantly less chipping over 1 year. Regarding MBL, BOP, and failure rates, both restoration types presented similar results at the 1-year follow-up.
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Affiliation(s)
- Péter Tajti
- Resident, Department of Prosthodontics, Semmelweis University, Budapest, Hungary; PhD student, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Eleonora Solyom
- Clinical Specialist, Department of Periodontology, Semmelweis University, Budapest, Hungary; PhD student, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - László Márk Czumbel
- Resident, Department of Periodontology, Semmelweis University, Budapest, Hungary; Scientific Methodology Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Bence Szabó
- Biostatistician, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Réka Fazekas
- Assistant Professor, Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Orsolya Németh
- Director, Associate Professor, Department of Community Dentistry, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hermann
- Director, Full Professor, Department of Prosthodontics, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Gábor Gerber
- Associate Professor, Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hegyi
- Strategic Director, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary; Strategic Director, Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Krisztina Mikulás
- Assistant Professor, Department of Prosthodontics, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary.
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Robles D, Brizuela A, Fernández-Domínguez M, Gil J. Osteoblastic and Bacterial Response of Hybrid Dental Implants. J Funct Biomater 2023; 14:321. [PMID: 37367285 DOI: 10.3390/jfb14060321] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/10/2023] [Accepted: 06/11/2023] [Indexed: 06/28/2023] Open
Abstract
Bacterial infections in dental implants generate peri-implantitis disease that causes bone loss and the mobility of the dental implant. It is well known that specific ranges of roughness favor the proliferation of bacteria, and it is for this reason that new dental implants called hybrids have appeared. These implants have a smooth area in the coronal part and a rough surface in the apical part. The objective of this research is the physico-chemical characterization of the surface and the osteoblastic and microbiological behavior. One-hundred and eighty discs of titanium grade 3 with three different surfaces (smooth, smooth-rough, and completely rough) were studied. The roughness was determined by white light interferometry, and the wettability and surface energy by the sessile drop technique and the application of Owens and Wendt equations. Human osteoblast SaOS-2 was cultured to determine cell adhesion, proliferation, and differentiation. Microbiological studies were performed with two common bacterial strains in oral infection, E. faecalis and S. gordonii, at different times of culture. The roughness obtained for the smooth surface was Sa = 0.23 and for the rough surface it was 1.98 μm. The contact angles were more hydrophilic for the smooth surface (61.2°) than for the rough surface (76.1°). However, the surface energy was lower for the rough surface (22.70 mJ/m2) in both its dispersive and polar components than the smooth surface (41.77 mJ/m2). Cellular activity in adhesion, proliferation, and differentiation was much higher on rough surfaces than on smooth surfaces. After 6 h of incubation, the osteoblast number in rough surfaces was more than 32% higher in relation to the smooth surface. The cell area in smooth surfaces was higher than rough surfaces. The proliferation increased and the alkaline phosphatase presented a maximum after 14 days, with the mineral content of the cells being higher in rough surfaces. In addition, the rough surfaces showed greater bacterial proliferation at the times studied and in the two strains used. Hybrid implants sacrifice the good osteoblast behavior of the coronal part of the implant in order to obstruct bacterial adhesion. The following fact should be considered by clinicians: there is a possible loss of bone fixation when preventing peri-implantitis.
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Affiliation(s)
- Daniel Robles
- Department of Translational Medicine, CEU San Pablo University, Urbanización Montepríncipe, 28925 Madrid, Spain
- Facultad de Odontología, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2, 47012 Valladolid, Spain
| | - Aritza Brizuela
- Facultad de Odontología, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2, 47012 Valladolid, Spain
| | - Manuel Fernández-Domínguez
- Department of Oral and Maxillofacial Surgery, University Hospital Monteprincipe, University CEU San Pablo, Av. de Montepríncipe, s/n, 28668 Madrid, Spain
| | - Javier Gil
- Bioengineering Institute of Technology, Facultad de Medicina y Ciencias de la Salud, Universidad Internacional de Catalunya, Josep Trueta s/n. Sant Cugat del Vallés, 08195 Barcelona, Spain
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Vieira SNV, Lourenço MF, Pereira RC, França EC, Vilaça ÊL, Silveira RR, Silva GC. Conventional and Digital Impressions for Fabrication of Complete Implant-Supported Bars: A Comparative In Vitro Study. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114176. [PMID: 37297310 DOI: 10.3390/ma16114176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/31/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
Obtaining accurate models and well-fitting prostheses during the fabrication of complete implant-supported prostheses has been a significant challenge. Conventional impression methods involve multiple clinical and laboratory steps that can lead to distortions, potentially resulting in inaccurate prostheses. In contrast, digital impressions may eliminate some of these steps, leading to better-fitting prostheses. Therefore, it is important to compare conventional and digital impressions for producing implant-supported prostheses. This study aimed to compare the quality of digital intraoral and conventional impressions by measuring the vertical misfit of implant-supported complete bars obtained using both types of techniques. Five digital impressions using an intraoral scanner and five impressions using elastomer were made in a four-implant master model. The plaster models produced with conventional impressions were scanned in a laboratory scanner to obtain virtual models. Screw-retained bars (n = five) were designed on the models and milled in zirconia. The bars fabricated using digital (DI) and conventional (CI) impressions were screwed to the master model, initially with one screw (DI1 and CI1) and later with four screws (DI4 and CI4), and were analyzed under a SEM to measure the misfit. ANOVA was used to compare the results (p < 0.05). There were no statistically significant differences in the misfit between the bars fabricated using digital and conventional impressions when screwed with one (DI1 = 94.45 µm vs. CI1 = 101.90 µm: F = 0.096; p = 0.761) or four screws (DI4 = 59.43 µm vs. CI4 = 75.62 µm: F = 2.655; p = 0.139). Further, there were no differences when the bars were compared within the same group screwed with one or four screws (DI1 = 94.45 µm vs. DI4 = 59.43 µm: F = 2.926; p = 0.123; CI1 = 101.90 µm vs. CI4 = 75.62 µm: F = 0.013; p = 0.907). It was concluded that both impression techniques produced bars with a satisfactory fit, regardless of whether they were screwed with one or four screws.
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Affiliation(s)
- Samanta N V Vieira
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | | | | | - Esdras C França
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Ênio L Vilaça
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Rodrigo R Silveira
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Guilherme C Silva
- Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
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Sharon E, Pietrokovski Y, Engel I, Assali R, Houri-Haddad Y, Beyth N. Biocompatibility, Surface Morphology, and Bacterial Load of Dental Implant Abutments following Decontamination Protocols: An In-Vitro Study. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114080. [PMID: 37297212 DOI: 10.3390/ma16114080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 06/12/2023]
Abstract
The long-term success of dental implant rehabilitation depends significantly on proper peri-implant soft tissue integration. Therefore, decontamination of abutments prior to their connection to the implant is beneficial to enhance soft tissue attachment and to aid in maintaining marginal bone around the implant. Consequently, different implant abutment decontamination protocols were evaluated regarding biocompatibility, surface morphology, and bacterial load. The protocols evaluated were autoclave sterilization, ultrasonic washing, steam cleaning, chlorhexidine chemical decontamination, and sodium hypochlorite chemical decontamination. The control groups included: (1) implant abutments prepared and polished in a dental lab without decontamination and (2) unprepared implant abutments obtained directly from the company. Surface analysis was performed using scanning electron microscopy (SEM). Biocompatibility was evaluated using XTT cell viability and proliferation assays. Biofilm biomass and viable counts (CFU/mL) (n = 5 for each test) were used for surface bacterial load evaluation. Surface analysis revealed areas of debris and accumulation of materials, such as iron, cobalt, chromium, and other metals, in all abutments prepared by the lab and with all decontamination protocols. Steam cleaning was the most efficient method for reducing contamination. Chlorhexidine and sodium hypochlorite left residual materials on the abutments. XTT results showed that the chlorhexidine group (M = 0.7005, SD = 0.2995) had the lowest values (p < 0.001) (autoclave: M = 3.6354, SD = 0.1510; ultrasonic: M = 3.4077, SD = 0.3730; steam: M = 3.2903, SD = 0.2172; NaOCl: M = 3.5377, SD = 0.0927; prep non-decont.: M = 3.4815, SD = 0.2326; factory: M = 3.6173, SD = 0.0392). Bacterial growth (CFU/mL) was high in the abutments treated with steam cleaning and ultrasonic bath: 2.93 × 109, SD = 1.68 × 1012 and 1.83 × 109, SD = 3.95 × 1010, respectively. Abutments treated with chlorhexidine showed higher toxicity to cells, while all other samples showed similar effects to the control. In conclusion, steam cleaning seemed to be the most efficient method for reducing debris and metallic contamination. Bacterial load can be reduced using autoclaving, chlorhexidine, and NaOCl.
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Affiliation(s)
- Esi Sharon
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Yoav Pietrokovski
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Ilana Engel
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Rula Assali
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Yael Houri-Haddad
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Nurit Beyth
- Department of Prosthodontics, Hadassah Medical Center, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
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Ke Y, Zhang Y, Wang Y, Chen H, Sun Y. Comparing the accuracy of full-arch implant impressions using the conventional technique and digital scans with and without prefabricated landmarks in the mandible: An in vitro study. J Dent 2023:104561. [PMID: 37236297 DOI: 10.1016/j.jdent.2023.104561] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 05/21/2023] [Accepted: 05/23/2023] [Indexed: 05/28/2023] Open
Abstract
OBJECTIVES This study evaluated the accuracy of digital implant impressions with or without prefabricated landmarks compared with the conventional method in the edentulous mandible. METHODS An edentulous mandibular stone cast with implant abutment analogs and scan bodies in FDI #46, 43, 33, and 36 served as the master model. Intraoral scanner groups (IOS) were divided into four subgroups: IOS-NT (no landmarks + Trios 4 scanner), IOS-NA (no landmarks + Aoralscan 3 scanner), IOS-YT (landmarks + Trios 4 scanner), and IOS-YA (landmarks + Aoralscan 3 scanner) (n=10). Landmarks were attached to the scan bodies with resin to improve scanning fluency. Conventional open-trayed technique (CNV) was performed with the 3D-printed splinting frameworks (n=10). The master model and conventional castings were scanned using a laboratory scanner, and the former served as the reference model. Overall distance and angle deviations between scan bodies were measured to determine trueness and precision. The ANOVA or Kruskal-Wallis test compared CNV group to scans without landmarks, while a generalized linear model analyzed scan groups with and without landmarks. RESULTS Compared to the CNV group, the IOS-NA and IOS-NT groups showed higher overall distance trueness (p=.009), and precision (distance, p<.001 and angular, p<.001). With landmarks, the IOS-YA group had higher overall trueness (distance, p<.001 and angular, p<.001) than the IOS-NA group, and the IOS-YT group has higher distance trueness (p=.041) than the IOS-NT group. Moreover, the precision in distance and angle was significantly improved for IOS-YA and IOS-YT groups, compared with the IOS-NA (p<.001) and IOS-NT (p<.001) groups separately. CONCLUSIONS Digital scans were more accurate than conventional splinting open-trayed impressions. Prefabricated landmarks significantly improved the accuracy of full-arch implant digital scans, regardless of the scanner used. CLINICAL SIGNIFICANCE Prefabricated landmarks can enhance the accuracy of intraoral scanners for full-arch implant rehabilitation, improving scanning efficiency and clinical outcomes.
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Affiliation(s)
- Yifang Ke
- Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health
| | - Yaopeng Zhang
- Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health
| | - Yong Wang
- Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health
| | - Hu Chen
- Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health.
| | - Yuchun Sun
- Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health.
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Robles D, Brizuela A, Fernández-Domínguez M, Gil J. Corrosion Resistance and Titanium Ion Release of Hybrid Dental Implants. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103650. [PMID: 37241275 DOI: 10.3390/ma16103650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/02/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
One of the strategies for the fight against peri-implantitis is the fabrication of titanium dental implants with the part close to the neck without roughness. It is well known that roughness favors osseointegration but hinders the formation of biofilm. Implants with this type of structure are called hybrid dental implants, which sacrifice better coronal osseointegration for a smooth surface that hinders bacterial colonization. In this contribution, we have studied the corrosion resistance and the release of titanium ions to the medium of smooth (L), hybrid (H), and rough (R) dental implants. All implants were identical in design. Roughness was determined with an optical interferometer and residual stresses were determined for each surface by X-ray diffraction using the Bragg-Bentano technique. Corrosion studies were carried out with a Voltalab PGZ301 potentiostat, using Hank's solution as an electrolyte at a temperature of 37 °C. Open-circuit potentials (Eocp), corrosion potential (Ecorr), and current density (icorr) were determined. Implant surfaces were observed by JEOL 5410 scanning electron microscopy. Finally, for each of the different dental implants, the release of ions into Hank's solution at 37 °C at 1, 7, 14, and 30 days of immersion was determined by ICP-MS. The results, as expected, show a higher roughness of R with respect to L and compressive residual stresses of -201.2 MPa and -20.2 MPa, respectively. These differences in residual stresses create a potential difference in the H implant corresponding to Eocp of -186.4 mV higher than for the L and R of -200.9 and -192.2 mV, respectively. The corrosion potentials and current intensity are also higher for the H implants (-223 mV and 0.069 μA/mm2) with respect to the L (-280 mV and 0.014 μA/mm2 and R (-273 mV and 0.019 μA/mm2). Scanning electron microscopy revealed pitting in the interface zone of the H implants and no pitting in the L and R dental implants. The titanium ion release values to the medium are higher in the R implants due to their higher specific surface area compared to the H and L implants. The maximum values obtained are low, not exceeding 6 ppb in 30 days.
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Affiliation(s)
- Daniel Robles
- Department of Translational Medicine CEU, San Pablo University, Urbanización Montepríncipe, Alcorcón, 28925 Madrid, Spain
- Facultad de Odontología, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2, 47012 Valladolid, Spain
| | - Aritza Brizuela
- Facultad de Odontología, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2, 47012 Valladolid, Spain
| | - Manuel Fernández-Domínguez
- Department of Oral and Maxillofacial Surgery, Hospital Monteprincipe, University CEU San Pablo, Av. de Montepríncipe s/n, Alcorcón, 28668 Madrid, Spain
| | - Javier Gil
- Bioengineering Institute of Technology, Facultad de Medicina y Ciencias de la Salud, Universidad Internacional de Catalunya, Josep Trueta s/n, Sant Cugat del Vallés, 08195 Barcelona, Spain
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Todaro C, Cerri M, Rodriguez Y Baena R, Lupi SM. Full-Arch Guided Restoration and Bone Regeneration: A Complete Digital Workflow Case Report. Healthcare (Basel) 2023; 11:healthcare11091301. [PMID: 37174843 PMCID: PMC10177883 DOI: 10.3390/healthcare11091301] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/19/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023] Open
Abstract
OBJECTIVE complex rehabilitations present multiple difficulties, regarding both the planification of the surgery and the design of the prothesis. A digital approach can support the workflow, as well as the degree of intraoperative precision, and improve the long-term prognosis. METHODS A surgical guide was designed for implant placement. An extensive regeneration of the upper jaw was performed with contextual implant insertion, and a delayed load rehabilitation was chosen. After four months, a second surgery and a simultaneous soft tissue augmentation was performed, and a 3D-printed temporary restoration was placed. After another two months, new dental and facial scans, smile design, and facial bite registrations were obtained. Upper and lower dentures were built using an exclusively digital workflow. Both metal substructures were passivated and cemented in one session; in the following appointment, the aesthetic and occlusal checks were carried out. During the third visit, both prostheses were delivered. RESULTS Careful case planning and the surgical guide made it possible to achieve primary stability and acceptable emergence profiles in an extremely reabsorbed upper jaw. Leukocyte-Platelet Rich Fibrin (L-PRF) made the extensive bone regeneration more approachable and lowered the post-operative pain and swelling, while speeding up the soft tissue healing process. During the re-entry surgery, the volumes of soft tissues were increased to improve aesthetics, and the amount of keratinized gingiva around the six implants was also increased. Smile design and facial scans have provided the means to create acceptable aesthetics and function in a few sessions with minimal patient discomfort. CONCLUSIONS Computer-assisted implantology is a safe and precise method of performing dental implant surgery. Preliminary studies have a high degree of accuracy, but further studies are needed to arrive at a fully digital clinical protocol at all stages.
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Affiliation(s)
- Claudia Todaro
- School of Dentistry, Department of Clinical Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy
| | | | - Ruggero Rodriguez Y Baena
- School of Dentistry, Department of Clinical Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy
| | - Saturnino Marco Lupi
- School of Dentistry, Department of Clinical Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy
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Koleilat A, Mansour A, Alkassimi FM, Aguirre A, Almaghrabi B. A Combination of Platelet-Rich Fibrin and Collagen Membranes for Sinus Membrane Repair: A Case Report (Repair of Sinus Membrane Perforation). Dent J (Basel) 2023; 11:dj11030084. [PMID: 36975581 PMCID: PMC10047151 DOI: 10.3390/dj11030084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/11/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
Maxillary sinus lift surgery is applied to compensate for the reduced vertical height in the posterior maxilla to facilitate placing a dental implant of a suitable length. Pathological conditions may be accidentally discovered, which necessitate careful assessment and management to prevent the infection of the maxillofacial complex and eventually bone grafting and dental implant failure. This case report describes an approach for the management of Schneiderian membrane perforation associated with the removal of an antral pseudocyst for successful dental implant therapy. A 70-year-old healthy Caucasian male presented for implant therapy to replace a non-restorable maxillary molar. Initial examination revealed the need for a sinus lift procedure to prepare the site for implant placement. A 3D CBCT evaluation before surgery revealed an incidental finding of a pathological lesion at the surgical site. The histological analysis of a biopsy specimen retrieved during implant site preparation showed findings consistent with antral pseudocyst. The resulting perforation of the sinus membrane was treated, and an adequate period of healing was given. A thickened sinus membrane was detected upon surgical exposure for implant placement. The novel technique illustrated could result in a fibrotic repaired sinus membrane and help shorten the time required for dental implant treatment.
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Affiliation(s)
| | - Alaa Mansour
- Periodontology Unit, College of Dentistry, Sharjah University, Sharjah P.O. Box 27272, United Arab Emirates
- Correspondence: ; Tel.: +971-566775619
| | - Fatma M. Alkassimi
- Department of Basic & Clinical Oral Sciences, College of Dental Medicine, Umm Al Qura University, Makkah, KSA P.O. Box 715, Saudi Arabia
| | - Alfredo Aguirre
- Department of Oral and Maxillofacial Pathology, UB SUNY School of Dental Medicine, Buffalo, NY 14214, USA
| | - Bandar Almaghrabi
- Department of Restorative Dentistry, UB SUNY School of Dental Medicine, Buffalo, NY 14214, USA
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He M, Pu T, Ding Q, Sun Y, Wang P, Sun Y, Zhang L. Occlusal contact and clearance of posterior implant-supported single crowns designed by two different methods: a self-controlled study. BMC Oral Health 2023; 23:151. [PMID: 36918877 PMCID: PMC10015920 DOI: 10.1186/s12903-023-02847-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 02/28/2023] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND Precise occlusal design of implant-supported fixed prostheses is difficult to achieve by the conventional wax-up method, often requiring chairside adjustments. The computer-aided design (CAD) method is promising. This study aims to compare the occlusal contacts and clearance of posterior implant-supported single crowns designed by the CAD and conventional methods. METHODS Sample size calculation indicated fourteen samples per group. Two sets of type-IV plaster casts with a single implant analog inserted in the posterior teeth region were mounted as master casts in a mechanical articulator in maximal intercuspal position (MIP). Seven working cast sets were obtained from each master cast by a closed tray technique, and mounted in MIP. Two implant-supported single crowns were designed with an occlusal clearance to achieve light occlusal contact in each working cast set by CAD and conventional method, separately. For the CAD group, the crown was designed in digital models obtained by scanning the working casts. For the conventional group, wax-up of the crown was prepared on the working casts and scanned to generate a STL file. In the working and master casts, mean and minimum occlusal clearances in the designed occlusal contact area of the both finished prostheses were calculated using the occlusal clearance (OC) and occlusal record (OR) method. The prostheses' occlusion was evaluated in master casts. RESULTS For the evaluation in the working casts, both design methods had similar mean occlusal clearances by the OC method (195.4 ± 43.8 vs. 179.8 ± 41.8 μm; P = 0.300), while CAD group resulted in a significantly larger minimum occlusal clearance in the designed occlusal contact area (139.5 ± 52.3 vs. 99.8 ± 43.8 μm; P = 0.043). Both design methods had similar mean and minimum occlusal clearances by the OR method (P > 0.05). For the evaluation in the master casts, both design techniques had similar mean and minimum occlusal clearances, number and distribution of occlusal contacts, and lateral interference ratios (P > 0.05). CONCLUSION Occlusal contact and clearance of posterior implant-supported single crowns designed by the CAD method can be at least as good as those designed by the conventional wax-up method.
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Affiliation(s)
- Mingzhu He
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, 22 South Street,Zhong Guan Cun, 100081, Beijing, Haidian District, China
- School/Hospital of Stomatology, Lanzhou University, Lanzhou, China
| | - Tingting Pu
- Denture Processing Center, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Qian Ding
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, 22 South Street,Zhong Guan Cun, 100081, Beijing, Haidian District, China.
| | - Yao Sun
- Department of Prosthodontics, The Third Clinic of Peking University School and Hospital of Stomatology, Beijing, China
| | - Pengfei Wang
- Denture Processing Center, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Yuchun Sun
- Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Lei Zhang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, 22 South Street,Zhong Guan Cun, 100081, Beijing, Haidian District, China
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Abutment rotational freedom on five implant systems with different internal connections. J Prosthet Dent 2023; 129:433-439. [PMID: 34238536 DOI: 10.1016/j.prosdent.2021.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 04/30/2021] [Accepted: 04/30/2021] [Indexed: 11/20/2022]
Abstract
STATEMENT OF PROBLEM Information regarding the rotational freedom of internal connection implants is sparse. PURPOSE The purpose of this in vitro study was to compare the rotational freedom of different internal conical and internal nonconical connections. MATERIAL AND METHODS Thirty implants, 30 straight manufactured standard abutments, and 30 standard abutment screws were obtained for each of the 5 implant systems tested. Three implant systems had indexed internal conical connections with different antirotational geometries: hexagon (Naturall+), cam-groove (ID CAM M), and octagon (Bone Level). Two implant systems had internal nonconical connections with hexagonal antirotational geometry (Tapered Screw-Vent and Seven). The implants were mounted in a steel plate, and a metal reference arm was attached to the abutment. Before tightening the standard abutment screw, a modified torque wrench was used to rotate the abutment clockwise until reaching the clockwise rotational endpoint. This modified torque wrench was connected to the abutment's outer surface. It allowed free access to the standard abutment screw for a second torque wrench, specific to each implant system. The modified torque wrench applied a controlled torque of 5 Ncm, which held the abutment at the clockwise rotational endpoint. The standard abutment screw was then tightened to the manufacturer's specified torque value with the second torque wrench. Angle value corresponding to the clockwise endpoint was measured microscopically between a fixed reference point on the steel plate and the reference arm. The abutment was then unscrewed and removed. The same procedure was carried out to rotate the abutment counterclockwise and measure the angle value corresponding to the counterclockwise rotational endpoint. The rotational freedom was finally determined from the differences in the angles between the clockwise and counterclockwise rotational endpoints. Rotational freedom angle values were summarized as descriptive statistics (means, standard deviations). The normality test (Kolmogorov-Smirnov) was applied, and the Kruskal-Wallis test was performed. The Wilcoxon signed-rank test was used to isolate the implant system differences from each other (α=.05). RESULTS The lowest mean rotational freedom angles were obtained for Bone Level (conical connection, 0.17 degrees) and Tapered Screw-Vent (nonconical connection, 0.05 degrees). These systems were followed in increasing order by ID CAM M (conical connection, 0.50 degrees), Seven (nonconical connection, 1.98 degrees), and Naturall+ (conical connection, 2.49 degrees). Compared with each other, all implant systems had significant statistical differences in rotational freedom angles (P<.05). CONCLUSIONS Significant differences were found among the 5 implant systems. The lowest mean rotational freedom angles were obtained both with a conical connection (Bone Level) and a nonconical connection (Tapered Screw-Vent).
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What every dental practitioner should know about how to examine patients with dental implants. Br Dent J 2023; 234:309-314. [PMID: 36899236 PMCID: PMC10005927 DOI: 10.1038/s41415-023-5574-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 10/31/2022] [Accepted: 11/08/2022] [Indexed: 03/12/2023]
Abstract
Dental implants are a common treatment modality provided in both primary and secondary care settings. It is increasingly common for a general dental practitioner to see patients with implant-retained restorations. This article suggests an implant safety checklist for general dental practitioners to help them examine an implant-retained prosthesis.
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Cristea I, Agop-Forna D, Martu MA, Dascălu C, Topoliceanu C, Török R, Török B, Bardis D, Bardi PM, Forna N. Oral and Periodontal Risk Factors of Prosthetic Success for 3-Unit Natural Tooth-Supported Bridges versus Implant-Supported Fixed Dental Prostheses. Diagnostics (Basel) 2023; 13:diagnostics13050852. [PMID: 36899996 PMCID: PMC10001396 DOI: 10.3390/diagnostics13050852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 02/19/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
The goals of this research are: (1) to compare the survival and prosthetic success of metal-ceramic 3-unit tooth- versus implant-supported fixed dental prostheses; (2) to evaluate the influence of several risk factors on the prosthetic success of tooth- and implant-supported fixed dental prostheses (FPDs). A total of 68 patients with posterior short edentulous spaces (mean age 61.00 ± 1.325 years), were divided into two groups: 3-unit tooth-supported FPDs (40 patients; 52 FPD; mean follow-up 10.27 ± 0.496 years) and 3-unit implant-supported FPDs (28 patients; 32 FPD; mean follow-up 8.656 ± 0.718 years). Pearson-chi tests were used to highlight the risk factors for the prosthetic success of tooth- and implant-supported FPDs and multivariate analysis was used to determine significant risk predictors for the prosthetic success of the tooth-supported FPDs. The survival rates of 3-unit tooth- versus implant-supported FPDs were 100% and 87.5%, respectively, while the prosthetic success was 69.25% and 68.75%, respectively. The prosthetic success of tooth-supported FPDs was significantly higher for patients older than 60 years (83.3%) vs. 40-60 years old (57.1%) (p = 0.041). Periodontal disease history decreased the prosthetic success of tooth- versus implant-supported FPDs when compared with the absence of periodontal history (45.5% vs. 86.7%, p = 0.001; 33.3% vs. 90%, p = 0.002). The prosthetic success of 3-unit tooth- vs. implant-supported FPDs was not significantly influenced by gender, location, smoking, or oral hygiene in our study. In conclusion, similar rates of prosthetic success were recorded for both types of FPDs. In our study, prosthetic success of tooth- versus implant-supported FPDs was not significantly influenced by gender, location, smoking, or oral hygiene; however, history of periodontal disease is a significant negative predictor of success in both groups when compared with patients without periodontal history.
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Affiliation(s)
- Ioana Cristea
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
| | - Doriana Agop-Forna
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
- Correspondence: (D.A.-F.); (M.-A.M.); Tel.: +40-232301618 (M.-A.M.)
| | - Maria-Alexandra Martu
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
- Correspondence: (D.A.-F.); (M.-A.M.); Tel.: +40-232301618 (M.-A.M.)
| | - Cristina Dascălu
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
| | - Claudiu Topoliceanu
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
| | - Roland Török
- Implant Institute Török, 1712 Tafers, Switzerland
| | - Bianca Török
- Implant Institute Török, 1712 Tafers, Switzerland
| | - Dimitrios Bardis
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
| | | | - Norina Forna
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Street 16, 700115 Iasi, Romania
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Shukri NMM, Duraisamy R, Balasubramaniam A, Ganapathy D. Evaluation of Implant and Prosthesis Survival Rates Based on Crestal Bone Loss. J Long Term Eff Med Implants 2023; 33:1-14. [PMID: 36734922 DOI: 10.1615/jlongtermeffmedimplants.2022041096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A dental implant mimics the tooth and restores its function. It has flourished as a replacement of missing natural teeth that has a success rate over 90% over the years. However, this root-form implant has also been associated with some complications after its application. Crestal bone loss, one of the biggest challenges in dental implant placement, occurs around the dental implant neck within a few months post-loading. The aim of this study was to determine survival rates and to measure crestal bone changes after placement of a single crown prosthesis. Data collection was done in a private dental university setting. Data from approximately 296 cases were retrieved after analyzing 86,000 case sheets. The following parameters were evaluated based on dental records: age, sex, implant placement area, implant diameter and length, and presence or absence of exudate. Crestal bone loss was assessed radiographically. Excel tabulation and SPSS version 23 were used for data analysis. Chi-square testing was done to correlate various parameters used in this study. Incipient crestal bone loss was commonly observed. It was seen that the association between crestal bone loss and exudate was statistically significant (Chi-square, p < 0.05). Within the limits of this study, incipient crestal bone loss was observed in most dental implants irrespective of bone density, implant length, implant diameter, and implant placement area.
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Affiliation(s)
- Nor Masitah Mohamed Shukri
- Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - Revathi Duraisamy
- Department of Prosthodontics and Implantology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, 162, Poonamallee High Road, Velappanchavadi, Chennai - 600077 India
| | - Arthi Balasubramaniam
- Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - Dhanraj Ganapathy
- Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
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Nishikawa Y, Tomotake Y, Kawano H, Naruishi K, Kido JI, Hiroshima Y, Murakami A, Ichikawa T, Yumoto H. Effects of Candidalysin Derived from Candida albicans on the Expression of Pro-Inflammatory Mediators in Human Gingival Fibroblasts. Int J Mol Sci 2023; 24:ijms24043256. [PMID: 36834667 PMCID: PMC9963793 DOI: 10.3390/ijms24043256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/09/2023] Open
Abstract
Candida albicans (Ca) is frequently detected in the peri-implant sulcus with peri-implantitis, a major postoperative complication after oral implant therapy. However, the involvement of Ca in the pathogenesis of peri-implantitis remains unclear. In this study, we aimed to clarify Ca prevalence in the peri-implant sulcus and investigated the effects of candidalysin (Clys), a toxin produced by Ca, on human gingival fibroblasts (HGFs). Peri-implant crevicular fluid (PICF) was cultured using CHROMagar and Ca colonization rate and colony numbers were calculated. The levels of interleukin (IL)-1β and soluble IL-6 receptor (sIL-6R) in PICF were quantified by enzyme-linked immunosorbent assay (ELISA). Pro-inflammatory mediator production and intracellular signaling pathway (MAPK) activation in HGFs were measured by ELISA and Western blotting, respectively. The Ca colonization rate and the average number of colonies in the peri-implantitis group tended to be higher than those in the healthy group. IL-1β and sIL-6R levels in the PICF were significantly higher in the peri-implantitis group than in the healthy group. Clys significantly induced IL-6 and pro-matrix metalloproteinase (MMP)-1 productions in HGFs, and co-stimulation with Clys and sIL-6R increased IL-6, pro-MMP-1, and IL-8 production levels in HGFs compared with Clys stimulation alone. These findings suggest that Clys from Ca plays a role in the pathogenesis of peri-implantitis by inducing pro-inflammatory mediators.
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Affiliation(s)
- Yasufumi Nishikawa
- Oral Implant Center, Tokushima University Hospital, 2-50-1 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Yoritoki Tomotake
- Oral Implant Center, Tokushima University Hospital, 2-50-1 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Hiromichi Kawano
- Oral Implant Center, Tokushima University Hospital, 2-50-1 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Koji Naruishi
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Jun-ichi Kido
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Yuka Hiroshima
- Department of Oral Microbiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Akikazu Murakami
- Department of Oral Microbiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Tetsuo Ichikawa
- Department of Prosthodontics and Oral Rehabilitation, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Hiromichi Yumoto
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
- Correspondence:
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Effect of Implantoplasty on Roughness, Fatigue and Corrosion Behavior of Narrow Diameter Dental Implants. J Funct Biomater 2023; 14:jfb14020061. [PMID: 36826860 PMCID: PMC9967762 DOI: 10.3390/jfb14020061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/25/2023] Open
Abstract
Implantoplasty (IP) is used in dental implants with peri-implantitis and aims to remove threads and polish rough surfaces in order to prevent bacterial colonization. As a result of this procedure, implant strength might be compromised. We tested 20 tapered screw-shaped Ti6Al4V dental implants with a simulated bone loss of 50%. Ten implants underwent IP and 10 served as controls. Surface topography (Sa, Sz, Ssk, and Sdr) was analyzed with a confocal optical microscope. Subsequently, a minimum of four series of cyclic loads were applied with a servo-hydraulic mechanical testing machine (5 × 106 cycles at 15 Hz, between a maximal nominal value-starting at 529 N in the IP group and 735 N in the control group-and 10% of that force). We recorded the number of cycles until failure and the type of failure. Implant failure was analyzed by visual inspection and scanning electron microscopy. Open circuit potential and potenctiodynamic tests were carried out with high precision potentiostat using Hank's solution at 37 °C to evaluate the effect of the implantoplasty on the corrosion resistance. Implantoplasty significantly reduced the surface topography values (median) and interquartile range (IQR); Sa from 1.76 (IQR = 0.11) to 0.49 (IQR = 0.16), Sz from 20.98 (IQR = 8.14) to 8.19 (IQR = 4.16), Ssk from 0.01 (IQR = 0.34) to -0.74 (IQR = 0.53) and Sdr from 18.20 (IQR = 2.26) to 2.67 (IQR = 0.87). The fatigue limits of the control and implantoplasty groups were 551 N and 529 N, respectively. The scanning electron micrographs showed fatigue striations indicating fatigue failure. Besides, the fractographic analysis revealed a typical brittle intergranular fracture mechanism. The infinite life range of the dental implants evaluated was largely above the threshold of usual chewing forces. Implantoplasty seems to render a fairly smooth surface and has a limited impact on fatigue resistance. In addition, implantoplasty produces a decrease in the corrosion resistance of the implant. Corrosion current density from 0.019 μA/cm2 for as-received to 0.069 μA/cm2 in the interface smooth-roughened dental implant. These places between the machining and the rough area of the implant are the most susceptible, with the appearance of pitting.
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Zhang R, Hao X, Zhang K. Evaluation of two different occlusal patterns on single posterior implant-supported crowns: A 12-month prospective study of occlusal analysis. J Prosthet Dent 2023:S0022-3913(22)00759-4. [PMID: 36610845 DOI: 10.1016/j.prosdent.2022.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 11/04/2022] [Accepted: 11/04/2022] [Indexed: 01/07/2023]
Abstract
STATEMENT OF PROBLEM According to the concept of implant-protected occlusion, light occlusion and late contact could prevent implants from occlusal overload. However, clinical data demonstrating how light occlusion differs from normal occlusion are lacking. PURPOSE The purpose of this prospective clinical study was to characterize the occlusal variation of single posterior implant-supported crowns with or without light occlusion. MATERIAL AND METHODS Participants with a single missing posterior maxillary or mandibular molar who were to receive implant-supported zirconia ceramic crowns were enrolled. The participants were divided into a light occlusion group, in which a 12-μm articulating film could be removed from the implant-supported crown and opposing natural teeth under the intercuspal position, and a normal occlusion group, in which the articulating film could not be removed. All participants underwent occlusal examinations using the T-scan III system, answered a satisfaction questionnaire using a visual analog scale (VAS), and received regular follow-ups. The participants were evaluated at 0.5, 3, 6, and 12 months after implant-supported crown delivery. The relative occlusal force of the implant-supported crowns, mesial teeth, control teeth (corresponding natural tooth on the dentition contralateral to each implant), and the occlusal contact time of implant-supported crowns were recorded. Moreover, the asymmetry index of the occlusal force and the VAS score were calculated. Two independent-sample tests were used to compare the 2 groups. The Wilcoxon rank sum and Mann‒Whitney tests were used to compare nonnormally distributed data (α=.001). RESULTS Fifty study participants with a mean ±standard deviation age of 36.97 ±7.34 years (23 men and 27 women aged 20 to 50 years) were followed for 0.5 to 12 months. No obvious complications of overloading were observed in either group. The mean ±standard deviation of the relative occlusal force of implant-supported crowns in the light occlusion group (from 4.91 ±3.52% to 10.34 ±4.35%) was always lower than that in the normal occlusion group (from 10.45 ±4.32% to 18.15 ±4.80%), while the mean ±standard deviation of the occlusal contact time in the light occlusion group (from 0.38 ±0.26 seconds to 0.10 ±0.07 seconds) was significantly later than that in the normal occlusion group (from 0.12 ±0.08 seconds to 0.04 ±0.02 seconds) (P<.001). The value of the asymmetry index of occlusal force remained within the normal range (10%). The VAS score in the normal occlusion group was significantly higher than that in the light occlusion group (P<.001). CONCLUSIONS Providing light occlusion to reduce occlusal force and delay the contact time was not stable over time. The relative occlusal force and occlusal contact time showed a similar development trend in both groups, and no obvious signs of occlusal overloading were observed in this study. Long-term follow-up is necessary for implant-supported prostheses because of the continuous increase in occlusal force.
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Affiliation(s)
- Ru Zhang
- Attending, Department of Prosthodontics, Capital Medical University School of Stomatology, Beijing Stomatological Hospital, Beijing, PR China
| | - Xiaoyu Hao
- Graduate Student, Department of Prosthodontics, Capital Medical University School of Stomatology, Beijing Stomatological Hospital, Beijing, PR China
| | - Kaiyu Zhang
- Associate Chief, Department of Oral and Maxillofacial Surgery, Capital Medical University School of Stomatology, Beijing Stomatological Hospital, Beijing, PR China.
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78
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Happe A, Blender S, Luthardt RG. Orthodontic pretreatment with aligners for optimizing the result prior to fixed restorations in the esthetic zone. J ESTHET RESTOR DENT 2023; 35:279-290. [PMID: 36591901 DOI: 10.1111/jerd.12997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To show the benefit of a minor orthodontic pretreatment prior to fixed restorations in the esthetic zone in challenging situations. OVERVIEW Esthetic rehabilitations in complex situations need careful treatment planning and comprehensive interdisciplinary approach. Minor orthodontic pretreatments may transfer complex situations into straight forward situations. Typical indications are space opening in order to provide space for a restoration with anatomic proportion or corrections of the tooth axis. CONCLUSION This article presents three clinical cases that show how decision making can be facilitated by a functional and esthetic wax-up/mock-up workflow and how orthodontic pretreatment can contribute to a more functional, less invasive, and more esthetic outcome of restorative treatments in the esthetic zone. CLINICAL SIGNIFICANCE Some complex cases in restorative dentistry can be transformed to straight forward cases with the help of minor orthodontic tooth movements.
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Affiliation(s)
- Arndt Happe
- Dentist/Oral Surgeon, Dr. Happe & Kollegen, Münster, Germany.,Department of Prosthetic Dentistry, Center of Dentistry, University of Ulm, Ulm, Germany
| | - Sarah Blender
- Department of Prosthetic Dentistry, Center of Dentistry, University of Ulm, Ulm, Germany
| | - Ralph G Luthardt
- Department of Prosthetic Dentistry, Center of Dentistry, University of Ulm, Ulm, Germany
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Duan C, Ye L, Zhang M, Yang L, Li C, Pan J, Wu Y, Cao Y. Clinical performance of zirconium implants compared to titanium implants: a systematic review and meta-analysis of randomized controlled trials. PeerJ 2023; 11:e15010. [PMID: 36949758 PMCID: PMC10026713 DOI: 10.7717/peerj.15010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 02/16/2023] [Indexed: 03/19/2023] Open
Abstract
Purpose To quantitatively assess and compare the clinical outcomes, including survival rate, success rate, and peri-implant indices of titanium and zirconium implants in randomized controlled trials. Methods The electronic databases searched included the Cochrane Central Register of Controlled Trials (CENTRAL), Medline via Ovid, EMBASE, and Web of Science. Randomized controlled trials (RCTs) that reported the effects of zirconium implants on primary outcomes, such as survival rate, success rate, marginal bone loss (MBL), and probing pocket depth (PPD), compared to titanium implants were included in this review. Two reviewers independently screened and selected the records, assessed their quality, and extracted the data from the included studies. Results A total of four studies from six publications reviewed were included. Two of the comparative studies were assessed at minimal risk of bias. Zirconium implants may have a lower survival rate (risk ratio (RR) = 0.91, CI [0.82-1.02], P = 0.100, I 2 = 0%) and a significantly lower success rate than titanium implants (RR = 0.87, CI [0.78-0.98], P = 0.030, I 2 = 0%). In addition, there was no difference between the titanium and zirconium implants in terms of MBL, PPD, bleeding on probing (BOP), plaque index (PI), and pink esthetic score (PES) (for MBL, MD = 0.25, CI [0.02-0.49], P = 0.033, I 2 = 0%; for PPD, MD = -0.07, CI [-0.19-0.05], P = 0.250, I 2 = 31%). Conclusion Zirconium implants may have higher failure rates due to their mechanical weakness. Zirconium implants should be strictly assessed before they enter the market. Further studies are required to confirm these findings.
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Affiliation(s)
- Chengchen Duan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Li Ye
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Mengyun Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Lei Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Chunjie Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jian Pan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yingying Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Oral implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yubin Cao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Pozzi A, Arcuri L, Fabbri G, Singer G, Londono J. Long-term survival and success of zirconia screw-retained implant-supported prostheses for up to 12 years: A retrospective multicenter study. J Prosthet Dent 2023; 129:96-108. [PMID: 34187699 DOI: 10.1016/j.prosdent.2021.04.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 01/18/2023]
Abstract
STATEMENT OF PROBLEM Despite the broad clinical application of zirconia for fixed implant-supported prostheses, evidence of long-term performance is sparse. PURPOSE The purpose of this retrospective study was to evaluate the long-term clinical and radiographic outcomes of zirconia-based partial and complete screw-retained implant-supported zirconia fixed dental prostheses (ISZFDPs). MATERIAL AND METHODS Records of patients treated with dental implants and ISZFDPs between December 2004 and June 2017 were screened. Eligible study participants, according to inclusion criteria, were contacted and invited to undergo clinical and radiographic examinations. Outcomes were evaluated as implant and prosthetic survival rates, prosthetic success rate, complications, marginal bone level (MBL) change, and soft tissue condition. Along with the effects of zirconia prosthesis type and level, the effects of implant type and connection, type of loading, and follow-up on MBL were tested with a generalized linear effects model (GLEM) (α=.05). RESULTS A total of 118 patients were identified, of whom 20 (16.9%) were not available for clinical examination for various reasons. Ninety-eight participants (mean age 60.7 ±11.7 years) with 337 implants were included, of which 176 (52.2%) had been immediately loaded. A total of 111 ISZFDPs (96 zirconia connection and 15 titanium base) were investigated: 24 complete ISZFDPs with a zirconia connection (12.9 ±0.97 dental units, minimum 12, maximum 14), 72 partial with a zirconia connection (3.11 ±1.12, minimum 2, maximum 7), 15 partial with a titanium base (3.62 ±1.02, minimum 2, maximum 5). Forty ISZFDPs had been in function for ≥10 years (36%), 38 for 5 to 9 years (34.2%), and 33 for 2 to 4 years (22.8%). The mean follow-up time was 7.2 ±3.4 years. No zirconia fractures were identified. Two implants and 2 ISZFDPs failed, with chipping being the most common complication (13.5%). The implant survival rate was 99.4%, and the prosthetic survival rate was 98.2%. The cumulative prosthetic success rate was 91.9%. MBL change was -0.18 ±0.59 mm. Thirteen implants were treated for peri-implantitis (3.8%), and 9 for mucositis (2.7%), but presented healthy peri-implant soft tissues at the follow-up examination. A significant difference was found between the implant-level and abutment-level prostheses (P=.013), with less marginal bone loss observed in ISZFDPs delivered at the implant level. CONCLUSIONS Zirconia-based screw-retained implant-supported prosthesis can be considered a reliable long-term treatment option for partial and complete edentulism. No zirconia fractures were experienced. Stable bone levels and low peri-implantitis rates were reported regardless of the ISZFDP type and level, implant type and connection, and type of loading.
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Affiliation(s)
- Alessandro Pozzi
- Adjunct Associate Professor, Goldstein Center for Esthetic and Implant Dentistry, Department of Restorative Sciences, The Dental College of Georgia at Augusta University, Augusta, Ga; Private practice, Rome, Italy.
| | - Lorenzo Arcuri
- Assistant Professor, Department of Clinical Sciences and Translational Medicine, University of Tor Vergata, Rome, Italy
| | | | | | - Jimmy Londono
- Associate Professor, Director of Goldstein Center for Esthetic and Implant Dentistry, Department of Restorative Sciences, The Dental College of Georgia at Augusta University, Augusta, Ga
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Nourizadeh A, Shafiee E, Khorramdel A, Mousavi SA, Rahbar M. Comparison of reverse torque values of abutment screws with the application of oil-based and water-based antibacterial agents. J Dent Res Dent Clin Dent Prospects 2022; 16:238-242. [PMID: 37560492 PMCID: PMC10407870 DOI: 10.34172/joddd.2022.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 12/16/2022] [Indexed: 08/11/2023] Open
Abstract
Background Using antibacterial agents to remove the foul odor of the implant cavity and prevent peri-implantitis can affect the detorque values and lead to the loosening of the abutment screw. This study investigated the effects of tetracycline and chlorhexidine gel on detorque values. Methods This in vitro study was carried out on three groups of five implants. Group G1 was the control group, and no material was applied to the implant cavity. In group G2, the implant cavity was first filled with artificial saliva and then with chlorhexidine gel. In group G3, the implant cavity was first filled with artificial saliva and then with tetracycline. The abutments were tightened with 25 N/cm2 and then loosened. Finally, the detorque values were calculated. Results The highest detorque values were recorded in group G1. Group G3 showed the lowest detorque values. ANOVA showed significant differences in mean detorque values (P<0.05) between the three groups. Conclusion According to this study, applying antibacterial agents decreased the detorque values and increased the risk of screw loosening. The reduction of detorque values was more pronounced with the oil-based antibacterial agent (tetracycline).
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Affiliation(s)
- Amin Nourizadeh
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
| | - Elnaz Shafiee
- Department of Prosthodontics, Faculty of Dentistry, Islamic Azad University, Tabriz, Iran
| | - Azin Khorramdel
- Department of Periodontics, Faculty of Dentistry, Islamic Azad University, Tabriz, Iran
| | - Seyed Amin Mousavi
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Science, Tabriz, Iran
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Kunrath MF, Shah FA, Dahlin C. Bench-to-bedside: Feasibility of nano-engineered and drug-delivery biomaterials for bone-anchored implants and periodontal applications. Mater Today Bio 2022; 18:100540. [PMID: 36632628 PMCID: PMC9826856 DOI: 10.1016/j.mtbio.2022.100540] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 12/03/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022] Open
Abstract
Nanotechnology and drug-release biomaterials have been thoroughly explored in the last few years aiming to develop specialized clinical treatments. However, it is rare to find biomaterials associated with drug delivery properties in the current dental market for application in oral bone- and periodontal-related procedures. The gap between basic scientific evidence and translation to a commercial product remains wide. Several challenges have been reported regarding the clinical translation of biomaterials with drug-delivery systems (BDDS) and nanofeatures. Therefore, processes for BDDS development, application in preclinical models, drug delivery doses, sterilization processes, storage protocols and approval requirements were explored in this review, associated with tentative solutions for these issues. The diversity of techniques and compounds/molecules applied to develop BDDS demands a case-by-case approach to manufacturing and validating a commercial biomaterial. Promising outcomes such as accelerated tissue healing and higher antibacterial response have been shown through basic and preclinical studies using BDDS and nano-engineered biomaterials; however, the adequate process for sterilization, storage, cost-effectiveness and possible cytotoxic effects remains unclear for multifunctional biomaterials incorporated with different chemical compounds; then BDDSs are rarely translated into products. The future benefits of BDDS and nano-engineered biomaterials have been reported suggesting personalized clinical treatment and a promising reduction in the use of systemic antibiotics. Finally, the launch of these specialized biomaterials with solid data and controlled traceability onto the market will generate strong specificity for healthcare treatments.
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Affiliation(s)
- Marcel F. Kunrath
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, P.O. Box 412, SE 405 30, Göteborg, Sweden,Department of Dentistry, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande Do Sul (PUCRS), Porto Alegre, Brazil,Corresponding author. Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, P.O. Box 412, SE 405 30, Göteborg, Sweden.
| | - Furqan A. Shah
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, P.O. Box 412, SE 405 30, Göteborg, Sweden
| | - Christer Dahlin
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, P.O. Box 412, SE 405 30, Göteborg, Sweden
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Liu N, Huang S, Guo F, Zhai S, Wang D, Li F, Liu C. Calcium phosphate cement with icariin-loaded gelatin microspheres as a local drug delivery system for bone regeneration. Biomed Eng Online 2022; 21:89. [PMID: 36550581 PMCID: PMC9773482 DOI: 10.1186/s12938-022-01052-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 11/10/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Icariin (ICA), a main active ingredient of Herba Epimedium, could promote bone formation, inhibit bone resorption and alleviate inflammatory responses. The aim of this study was to investigate the effect of ICA on the inhibition of bacteria associated with peri-implantitis, and fabricate a calcium phosphate cement (CPC) with ICA-loaded gelatin microspheres (GMs) as a local drug delivery system efficiently promoting bone formation and alleviating inflammation. RESULTS In this study, ICA exhibited antibacterial activity against P. gingivalis with a MIC value of 1 × 10-4 mol/L. When the concentration of ICA was 0.5 mM, the encapsulation efficiency of GMs reached the maximum value of 76.26 ± 3.97%. GMs with ICA revealed a controlled release profile, 0.5 mM ICA exhibited a higher ICA release profile than the other groups during a 21 d monitoring span. The results of SEM and XRD demonstrated successful fabrication of a calcium phosphate cement with ICA-loaded GMs. ICA released from CPC/GMs (ICA) was slower than ICA released from GMs within 10 days. CPC/GMs (ICA) exhibited antibacterial activity against P. gingivalis, but the antibacterial rate of CPC/GMs (ICA) was only 17.15 ± 6.06%. In addition, CPC/GMs (ICA) promoted the proliferation of BMSCs and significantly stimulated the differentiation and maturation of BMSCs. In vivo, H&E and Masson staining experiments demonstrated that CPC/GMs (ICA) exhibited better capacity for bone regeneration than CPC/GMs and CPC, and the expression of TNF-α and IL-1β in the tissue around CPC/GMs (ICA) was significantly lower than CPC/GMs and CPC in IHC staining (P < 0.05). CONCLUSION In this study, ICA exhibited limited antibacterial activity against bacteria associated with peri-implantitis. A composite material of calcium phosphate cement with ICA-loaded gelatin microspheres was developed, which not only promoting osteoinductivity and bone formation, but also alleviating inflammation, demonstrating its potential as a promising bone substitute material for treatment of peri-implantitis.
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Affiliation(s)
- Ning Liu
- grid.508540.c0000 0004 4914 235XDepartment of Oral and Maxillofacial Surgery, School of Stomatology, Xi’an Medical University, Xi’an, 710021 Shaanxi China
| | - Shuo Huang
- grid.508540.c0000 0004 4914 235XDepartment of Oral and Maxillofacial Surgery, School of Stomatology, Xi’an Medical University, Xi’an, 710021 Shaanxi China
| | - Fang Guo
- grid.508540.c0000 0004 4914 235XDepartment of Oral and Maxillofacial Surgery, School of Stomatology, Xi’an Medical University, Xi’an, 710021 Shaanxi China
| | - Shafei Zhai
- grid.508540.c0000 0004 4914 235XDepartment of Oral Histopathology, School of Stomatology, Xi’an Medical University, Xi’an, 710021 Shaanxi China
| | - Danyang Wang
- grid.508540.c0000 0004 4914 235XDepartment of Prosthodontics, School of Stomatology, Xi’an Medical University, Xi’an, 710021 Shaanxi China
| | - Fang Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Air Force Military Medical University, Xi’an, 710032 Shaanxi China
| | - Changkui Liu
- grid.508540.c0000 0004 4914 235XDepartment of Oral and Maxillofacial Surgery, School of Stomatology, Xi’an Medical University, Xi’an, 710021 Shaanxi China
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Strappa EM, Memè L, Cerea M, Roy M, Bambini F. Custom-made additively manufactured subperiosteal implant. Minerva Dent Oral Sci 2022; 71:353-360. [PMID: 36345834 DOI: 10.23736/s2724-6329.22.04640-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Subperiosteal implants were introduced in the last century. Poor clinical results led those implants to be progressively abandoned. Recently, several Authors suggested a revival of subperiosteal implants as an alternative to regenerative procedures. The purpose of this study was to describe the clinical application of custom-made additively manufactured subperiosteal implant for fixed prosthetic rehabilitation of edentulous maxilla. Plaster models of the upper and the lower arch were scanned, as well as the mock-up. Digital Imaging and Communications in Medicine data obtained from cone beam computed tomography were processed through the thresholding procedure. The design of the subperiosteal implant was drawn on the stereolithographic model and scanned. Once the digital project of the subperiosteal implant was completed, it was sent to additive manufacturing. After the surgery, the patient was strictly monitored for up to 2 years. The outcomes were assessed based on the incurrence of biological and mechanical complications, postoperative complications, and implant survival. The patient did not suffer from postoperative complications. Neither biological nor mechanical complications occurred during the follow-up period. At the end of the study, the implant was still in function. Custom-made subperiosteal implants could be considered as an alternative to regenerative procedures for the rehabilitation of severe bone atrophy. Further studies are needed in the future to confirm the positive outcome.
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Affiliation(s)
| | - Lucia Memè
- Department of Clinical Sciences and Stomatology, Marche Polytechnic University, Ancona, Italy
| | | | - Marco Roy
- Department of Prosthodontics, Poznań University of Medical Sciences, Poznań, Poland
| | - Fabrizio Bambini
- Department of Clinical Sciences and Stomatology, Marche Polytechnic University, Ancona, Italy
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On SW, Yi SM, Park IY, Byun SH, Yang BE. Fracture and Fatigue of Dental Implants Fixtures and Abutments with a Novel Internal Connection Design: An In Vitro Pilot Study Comparing Three Different Dental Implant Systems. J Funct Biomater 2022; 13:jfb13040239. [PMID: 36412880 PMCID: PMC9680401 DOI: 10.3390/jfb13040239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/07/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to compare the mechanical behaviors of three dental implant fixtures with different abutment connection designs. Three implant systems were studied: the control (BLX implant), test group 1 (TORX++ implant), and test group 2 (IU implant). Three samples from each group were subjected to static compression to fracture tests to determine the maximum fracture load, and twelve samples were exposed to fatigue tests that measured how many cycles the implants could endure before deformation or fracture. Detailed images of the implant-abutment assemblies were obtained using micro-computed tomography imaging, and fractured or deformed areas were observed using a scanning electron microscope (SEM). The mean maximum breaking loads of 578.45 ± 42.46 N, 793.26 ± 57.43 N, and 862.30 ± 74.25 N were obtained for the BLX, TORX++, and IU implants, respectively. All samples in the three groups withstood 5 × 106 cycles at 50% of the nominal peak value, and different fracture points were observed. All abutment connection designs showed suitable mechanical properties for intraoral use. Microscopic differences in the fracture patterns may be due to the differences in the fixture design or abutment connection, and mechanical complications could be prevented by lowering the overload reaching the implant or preventing peri-implantitis.
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Affiliation(s)
- Sung-Woon On
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong 18450, Korea
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
| | - Sang-Min Yi
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14066, Korea
| | - In-Young Park
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Division of Orthodontics, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14066, Korea
| | - Soo-Hwan Byun
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14066, Korea
- Correspondence: (S.-H.B.); (B.-E.Y.); Tel.: +82-31-380-3870 (S.-H.B. & B.-E.Y.); Fax: +82-31-380-1726 (S.-H.B. & B.-E.Y.)
| | - Byoung-Eun Yang
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Korea
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14066, Korea
- Correspondence: (S.-H.B.); (B.-E.Y.); Tel.: +82-31-380-3870 (S.-H.B. & B.-E.Y.); Fax: +82-31-380-1726 (S.-H.B. & B.-E.Y.)
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86
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Kato T, Yasunami N, Furuhashi A, Sanda K, Ayukawa Y. Effects of Autoclave Sterilization and Multiple Use on Implant Scanbody Deformation In Vitro. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7717. [PMID: 36363311 PMCID: PMC9655283 DOI: 10.3390/ma15217717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
In the intraoral scanner (IOS) impression technique for dental implants, a scanbody (SB) is connected to the implant and scanned. Poly(ether-ether-ketone) (PEEK) is a widely used material for SBs and it is recommended for single use. However, from the perspective of the Sustainable Development Goals, it is desirable to use these products multiple times. As SBs are used in patients' mouths, proper sterilization is necessary for multiple uses. In the present study, the effect of autoclave treatment and connection/disconnection on SB deformation was investigated. The SB was connected to the implant and stereolithography (STL) data were obtained. Then, the SB was disconnected and underwent autoclave treatment, or was connected and disconnected multiple times, or underwent a combination of both processes. The results showed that there were significant differences in the distance and angle when comparing SBs before and after the autoclave treatment, but repeated connections with or without autoclave treatment had no significant impact on the measured values. The surface texture, observed with scanning electron microscopy, showed that a groove was observed on the surface of the SB, but the groove did not show major changes after 10 connection/autoclave processes. These results indicate that autoclave sterilization has some impact on SB deformation but connection/disconnection itself may not have a huge impact on SB deformation.
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87
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Athab Abduljabbar Z, Svensson KG, Hjalmarsson L, Franke Stenport V, Eliasson A. Chewing side preference and laterality in patients treated with unilateral posterior implant-supported fixed partial prostheses. J Oral Rehabil 2022; 49:1080-1086. [PMID: 36065716 PMCID: PMC9826335 DOI: 10.1111/joor.13366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 06/16/2022] [Accepted: 08/22/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND It is not clear to what extent chewing is improved by unilateral oral rehabilitation with implant-supported fixed partial prostheses (ISFPPs). OBJECTIVES This study aimed to investigate whether patients treated with unilateral ISFPPs in the maxilla use their prostheses during mastication to the same extent as they used their contralateral natural teeth. A further aim was to investigate whether there is a correlation between preferred chewing side and laterality. METHODS Chewing side preference was assessed in 15 participants treated with unilateral ISFPPs in the maxilla. The first, second, third, fifth and tenth chewing cycles were assessed, and the test was repeated 10 times. All participants also answered a questionnaire about their chewing side preference. RESULTS Most of the participants presented bilateral chewing, but two (13%) chewed only on the ISFPP. There was no statistically significant association between the objectively assessed chewing side and dental status (natural teeth or ISFPPs) during any of the recorded chewing cycles (p > .1). There were statistically significant correlations between both the subjectively reported usually preferred chewing side and the subjective chewing side preference during the test and the objectively assessed chewing side for the first three chewing cycles (p < .01). No correlation was found between handedness and the objectively assessed chewing side. CONCLUSION In the present study, most participants chewed bilaterally, and chewing was performed both on the ISFPP and on the natural teeth. No correlation was found between the preferred chewing side, objectively or subjectively determined and laterality.
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Affiliation(s)
- Zahra Athab Abduljabbar
- Specialist Dental Clinic, Folktandvården Sörmland ABMälar HospitalEskilstunaSweden,Centre for Clinical Research SörmlandUppsala UniversityUppsalaSweden,Department of Prosthodontics/Dental Materials Science, Institute of Odontology, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | | | - Lars Hjalmarsson
- Specialist Dental Clinic, Folktandvården Sörmland ABMälar HospitalEskilstunaSweden,Centre for Clinical Research SörmlandUppsala UniversityUppsalaSweden,Department of Prosthodontics/Dental Materials Science, Institute of Odontology, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Victoria Franke Stenport
- Department of Prosthodontics/Dental Materials Science, Institute of Odontology, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Alf Eliasson
- Dental Research Department, Faculty of Medicine and HealthÖrebro UniversityÖrebroSweden
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88
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Sun H, Yu P, Peng X, Meng L, Qin M, Xu X, Li J. Inspired by the Periodontium: A Universal Bacteria-Defensive Hydrogel for Preventing Percutaneous Device-Related Infection. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50424-50433. [PMID: 36282568 DOI: 10.1021/acsami.2c15478] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Percutaneous device-related infection has greatly shortened the service period of devices and seriously reduced the quality of life of patients. Bacteria are one of the main pathogenic factors and cannot be effectively and conveniently eradicated by traditional strategies (e.g., construct coatings and introduce antibiotics), due to the complex interface among medical devices, surrounding tissue, and colonizing bacteria. Inspired by the periodontium, a universal bacteria-defensive hydrogel adapting to the complicated interface is fabricated by introducing phenol-amine chemistry to a polymeric matrix of N-hydroxyethyl acrylamide (HPC hydrogels). The HPC hydrogels with excellent toughness (2.1 MJ/m3), adhesion (10.2 and 13.2 kPa for pigskin and Ti-6Al-4V alloy, respectively), and antibacterial property (up to 99.9% for both Escherichia coli and Staphylococcus aureus) contributed to the innate microbe barrier via sealing the tissue-device interface and adaptive defense to eradicate bacteria. Meanwhile, bacterial invasion experiments demonstrate HPC hydrogels possess both a bacteria-defensive property (up to 24 h) and cell-protecting function at the same time. Furthermore, the biocompatibility of HPC hydrogels is verified in tests for in vitro cytotoxicity and in vivo irritation. Hence, the designed HPC hydrogels are considered as an emerging and universal candidate for preventing bacterial infection and can protect the deep tissue around a percutaneous device.
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Affiliation(s)
- Hui Sun
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Peng Yu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xu Peng
- Experimental and Research Animal Institute, Sichuan University, Chengdu 610065, China
| | - Lingzhuang Meng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Meng Qin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xinyuan Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jianshu Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Oral Diseases, Med-X Center for Materials, West China Hospital of Stomatology, Sichuan University, Chengdu 610061, China
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89
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Memè L, Sartini D, Pozzi V, Emanuelli M, Strappa EM, Bittarello P, Bambini F, Gallusi G. Epithelial Biological Response to Machined Titanium vs. PVD Zirconium-Coated Titanium: An In Vitro Study. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15207250. [PMID: 36295315 PMCID: PMC9610795 DOI: 10.3390/ma15207250] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/25/2022] [Accepted: 10/12/2022] [Indexed: 05/28/2023]
Abstract
The aim of this study was to compare the epithelial biological response to machined titanium Ti-6Al-4V grade 5 and titanium Ti-6Al-4V grade 5 coated with zirconia (ZrN) by physical vapor deposition (PVD). Human keratinocytes were cultured in six-well plates. Machined titanium TiAl4V4 grade 5 (T1) and ZrN-coated titanium TiAl4V4 grade 5 (T2) discs were placed in two different wells. The remaining two wells served as control (C). Scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) were performed to compare the T1 and T2 surfaces. Subsequent analyses were performed to explore the effect of T1 and T2 contact with human keratinocyte HUKE cell lines. Cell viability was evaluated using a trypan blue exclusion test and MTT assay. Cell lysates from C, T1, and T2 were Western blotted to evaluate E-cadherin and Integrin-α6β4 expression. SEM revealed that T2 was smoother and more homogeneous than T1. EDS showed homogeneous and uniform distribution of ZrN coating on T2. Cell viability analyses did not show significant differences between T1 and T2. Furthermore, E-cadherin and Integrin-α6β4 expressions of the epithelial cells cultured in T1 and T2 were similar. Therefore, titanium Ti-6Al-4V grade 5 surfaces coated with ZrN by PVD seem to be similar substrates to the uncoated surfaces for keratinocyte adhesion and proliferation.
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Affiliation(s)
- Lucia Memè
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, 60126 Ancona, Italy
| | - Davide Sartini
- Department of Clinical Sciences, Polytechnic University of Marche, 60126 Ancona, Italy
| | - Valentina Pozzi
- Department of Clinical Sciences, Polytechnic University of Marche, 60126 Ancona, Italy
| | - Monica Emanuelli
- Department of Clinical Sciences, Polytechnic University of Marche, 60126 Ancona, Italy
| | - Enrico M. Strappa
- Department of Health Technologies, IRCCS Ospedale Galeazzi-Sant’Ambrogio, University of Milan, 20157 Milan, Italy
| | | | - Fabrizio Bambini
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, 60126 Ancona, Italy
| | - Gianni Gallusi
- Department of Clinical Sciences and Translational Medicine, University Tor Vergata, 00133 Rome, Italy
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90
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Hasan J, Bright R, Hayles A, Palms D, Zilm P, Barker D, Vasilev K. Preventing Peri-implantitis: The Quest for a Next Generation of Titanium Dental Implants. ACS Biomater Sci Eng 2022; 8:4697-4737. [PMID: 36240391 DOI: 10.1021/acsbiomaterials.2c00540] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Titanium and its alloys are frequently the biomaterial of choice for dental implant applications. Although titanium dental implants have been utilized for decades, there are yet unresolved issues pertaining to implant failure. Dental implant failure can arise either through wear and fatigue of the implant itself or peri-implant disease and subsequent host inflammation. In the present report, we provide a comprehensive review of titanium and its alloys in the context of dental implant material, and how surface properties influence the rate of bacterial colonization and peri-implant disease. Details are provided on the various periodontal pathogens implicated in peri-implantitis, their adhesive behavior, and how this relationship is governed by the implant surface properties. Issues of osteointegration and immunomodulation are also discussed in relation to titanium dental implants. Some impediments in the commercial translation for a novel titanium-based dental implant from "bench to bedside" are discussed. Numerous in vitro studies on novel materials, processing techniques, and methodologies performed on dental implants have been highlighted. The present report review that comprehensively compares the in vitro, in vivo, and clinical studies of titanium and its alloys for dental implants.
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Affiliation(s)
- Jafar Hasan
- Academic Unit of STEM, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Richard Bright
- Academic Unit of STEM, University of South Australia, Mawson Lakes, SA 5095, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park 5042, South Australia, Australia
| | - Andrew Hayles
- Academic Unit of STEM, University of South Australia, Mawson Lakes, SA 5095, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park 5042, South Australia, Australia
| | - Dennis Palms
- Academic Unit of STEM, University of South Australia, Mawson Lakes, SA 5095, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park 5042, South Australia, Australia
| | - Peter Zilm
- Adelaide Dental School, University of Adelaide, Adelaide, 5005, South Australia, Australia
| | - Dan Barker
- ANISOP Holdings, Pty. Ltd., 101 Collins St, Melbourne VIC, 3000 Australia
| | - Krasimir Vasilev
- Academic Unit of STEM, University of South Australia, Mawson Lakes, SA 5095, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park 5042, South Australia, Australia
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91
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Yang F, Ruan Y, Liu Y, Chen J, Chen Y, Zhang W, Ding Y, Wang L. Abutment mechanical complications of a Morse taper connection implant system: A 1- to 9-year retrospective study. Clin Implant Dent Relat Res 2022; 24:683-695. [PMID: 35791805 PMCID: PMC9796380 DOI: 10.1111/cid.13115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/29/2022] [Accepted: 05/30/2022] [Indexed: 01/01/2023]
Abstract
BACKGROUND The fracture of a Morse tapered abutment connection in an osseointegrated implant is one of the most serious mechanical complications, and it is extremely hard to deal with this complication in clinical practice. PURPOSE The aim of this study was to explore the cumulative mechanical complications focus on abutment of a platform switching Morse taper connection implant system after loading, and to perform a retrospective, approximately 1- to 9-year follow-up study to identify the predisposing factors. MATERIALS AND METHODS A total of 495 patients with 945 fitted implants were enrolled in this study with a follow-up from January 2012 to January 2020. The data of mechanical complications of the abutment, including abutment fracture (AF) and abutment screw loosening (ASL), and possible causative factors were extracted and evaluated statistically. RESULTS A total of 25 out of 945 (2.65%) cumulative abutment mechanical complications occurred. AF was the most common complication (n = 13, 1.38%), followed by ASL (n = 12, 1.27%). For AF, gender, type of prosthesis, abutment design, and implant diameter were identified as the causative factors. AF was mostly observed in the single crown of males in molar areas, while ASL was more likely to occur on an angled abutment than on a non-angled abutment. Moreover, the abutment with the positioning index (/X) had a higher incidence of fracture than the abutment without the positioning index (C/). CONCLUSIONS This study shows that the Morse taper connection is a safe abutment connection. AF occurs more frequently within single crowns in molar area of males, especially with the positioning index (/X), while ASL is more likely to occur in an angled abutment.
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Affiliation(s)
- Fan Yang
- Center for Plastic & Reconstructive Surgery, Department of StomatologyZhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College)HangzhouZhejiangChina
| | - Yan Ruan
- Department of StomatologyBengbu Medical CollegeBengbuAnhuiChina
| | - Yunqing Liu
- Department of Restorative Dentistry, Division of Oral Health Science, Graduate School of Dental MedicineHokkaido UniversitySapporoJapan
| | - Jianping Chen
- Center for Plastic & Reconstructive Surgery, Department of StomatologyZhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College)HangzhouZhejiangChina
| | - Yunfang Chen
- Center for Plastic & Reconstructive Surgery, Department of StomatologyZhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College)HangzhouZhejiangChina
| | - Wentao Zhang
- Center for Plastic & Reconstructive Surgery, Department of StomatologyZhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College)HangzhouZhejiangChina
| | - Yude Ding
- Center for Plastic & Reconstructive Surgery, Department of StomatologyZhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College)HangzhouZhejiangChina
| | - Linhong Wang
- Center for Plastic & Reconstructive Surgery, Department of StomatologyZhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College)HangzhouZhejiangChina,Department of Restorative Dentistry, Division of Oral Health Science, Graduate School of Dental MedicineHokkaido UniversitySapporoJapan
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92
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Yildiz H, Bertl K, Stavropoulos A. Titanium implant surface roughness after different implantoplasty protocols: A laboratory study. Clin Exp Dent Res 2022; 8:1315-1321. [PMID: 36069295 PMCID: PMC9760168 DOI: 10.1002/cre2.659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 08/08/2022] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVE To compare the surface roughness of sandblasted, large grit, acid-etched (SLA) surfaced titanium discs, after implantoplasty (IP) with different combinations of rotating instruments without or with the subsequent use of a silicone polisher. METHODS Titanium discs (n = 12 per group) with an SLA surface were treated with the following IP protocols: (1) Tungsten carbide bur sequence from company 1 (Komet Dental) without or with polishing (P) with a silicone polisher (Brownie®), (2) tungsten carbide bur sequence from company 2 (Hager & Meisinger GmbH) without or with P, and (3) diamond bur sequence (125, 40, 15-μm grit) without or with P. Pristine turned (T) and SLA titanium discs were used as negative and positive controls, respectively. Surface roughness measurements were taken with a contact profilometer rendering Ra and Rz values. RESULTS All IP protocols, even without P, resulted in significantly reduced surface roughness compared to the SLA group. The tungsten carbide bur protocols, even without P, resulted in a surface roughness similar to or significantly lower than that in the T group in terms of Ra and Rz , respectively. IP with the diamond bur sequence resulted in a significantly rougher surface compared to that achieved with the carbide burs. In all IP groups, P with a silicone polisher resulted in a significantly smoother surface. CONCLUSIONS IP with dedicated tungsten carbide burs without or with the subsequent use of a silicone polisher resulted in a surface roughness similar to or significantly lower than that of commercially available turned surfaces. IP with a diamond bur sequence required additional polishing to achieve a comparable surface roughness to that of commercially available turned surfaces.
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Affiliation(s)
- Hulya Yildiz
- Department of Periodontology, Faculty of DentistryIstanbul Aydın UniversityIstanbulTurkey
| | - Kristina Bertl
- Division of Oral Surgery, University Clinic of DentistryMedical University of ViennaViennaAustria,Department of Periodontology, Faculty of OdontologyUnivesity of MalmöMalmöSweden
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of OdontologyUnivesity of MalmöMalmöSweden,Division of Conservative Dentistry and Periodontology, University Clinic of DentistryMedical University of ViennaViennaAustria
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93
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Torabi S, Panjnoush M, Poursafar F, Taheri M, Khorsand A, Yaghobee S. Comparison of Ridge Mapping and Cone Beam Computed Tomography for the Determination of Alveolar Ridge Width. J Maxillofac Oral Surg 2022; 21:802-807. [PMID: 36274889 PMCID: PMC9474968 DOI: 10.1007/s12663-021-01530-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/06/2021] [Indexed: 10/21/2022] Open
Abstract
Objective This study aimed to evaluate the accuracy of cone beam computed tomography (CBCT) and ridge mapping for linear measurement of alveolar ridge width. Materials and methods In this cross-sectional study, 25 implant placement sites in 25 patients were selected and an acrylic stent was fabricated for each one. Three buccal-lingual point pairs were located on the stent at 4-, 7-, and 10-mm distances from the soft tissue summit of the alveolar ridge. The measurements were recorded by three examiners (two periodontists and one radiologist). Results Both techniques (CBCT and ridge mapping) overestimated alveolar ridge width compared to direct measurements, but mean differences compared to direct measurements (gold standard) were not statistically significant. The lowest mean difference compared to direct measurements was related to the ridge mapping technique, and CBCT measurements were less accurate to measure the alveolar ridge width. Conclusion In determining alveolar ridge width, ridge mapping and CBCT are both valid and useful. Ridge mapping provides high accuracy, simplicity, and lack of radiation exposure.
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Affiliation(s)
- Sepehr Torabi
- Department of Periodontics, Tehran University of Medical Sciences Dental School, Tehran, Iran
| | - Mehrdad Panjnoush
- Department of Oral and Maxillofacial Radiology, Tehran University of Medical Sciences Dental School, Tehran, Iran
| | - Farzaneh Poursafar
- Department of Periodontics, Tehran University of Medical Sciences Dental School, Tehran, Iran
| | - Mina Taheri
- Department of Periodontics, Tehran University of Medical Sciences Dental School, Tehran, Iran
| | - Afshin Khorsand
- Department of Periodontics, Tehran University of Medical Sciences Dental School, Tehran, Iran
| | - Siamak Yaghobee
- Department of Periodontics, Dental Implant Research Center, Tehran University of Medical Sciences Dental School, Tehran, Iran
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94
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The Conometric Connection for the Implant-Supported Fixed Prosthesis: A Narrative Review. PROSTHESIS 2022. [DOI: 10.3390/prosthesis4030037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aim: The conometric concept was proposed as a possible connection between the abutment and the prosthetic coping. This research aimed to review the features and possible clinical uses of this connection in an implant-supported fixed prosthesis. Methods: An electronic search was conducted on an online database for the topic in object; articles published in international literature were considered and the research gave 17 results, and 6 parameters were analyzed. Results: This connection eliminated the possibility of cement residues in the subgingival region, reducing the risk of inflammation of peri-implant soft and hard tissues; not having to remove the cement residues, it is possible to place the margins in more apical portions, improving the aesthetics outcomes of the rehabilitations. It is also known that the retention by means of a screw causes a weakening of the restoration. The retentive force is adequate for fixed rehabilitation even after a high number of insertion–disengagement cycles; in vitro studies have also shown a high bacterial sealing. Implant rehabilitation using preformed components, such as conometric hoods, is helpful for CAD/CAM, so a digital workflow is possible. Several types of prosthesis were presented, all of which demonstrated adequate clinical performance in the follow-up observation. Conclusions: This type of connection seems to be suitable to support fixed implant rehabilitations, but long-term clinical studies are needed to validate this system.
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95
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A Retrospective Analysis of Biological Complications of Dental Implants. Int J Dent 2022; 2022:1545748. [PMID: 35990253 PMCID: PMC9391181 DOI: 10.1155/2022/1545748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 06/25/2022] [Accepted: 07/29/2022] [Indexed: 11/17/2022] Open
Abstract
Methods A retrospective analysis of patients aged ≥18 years and having dental implants placed at Dubai Health Authority in 2010. Relevant information related to systemic-, patient-, implant-, site-, surgical- and prosthesis-related factors were collected. The strength of association between the prevalence of peri-implant mucositis and peri-implantitis and each variable was measured by chi-square analysis. A binary logistic regression analysis was performed to identify possible risk factors. Results A total of 162 patients with 301 implant-supported restorations were included in the study. The age of the patients ranged between 19 and 72 with a mean age of 46.4 ± 11.7 years. The prevalence of peri-implant mucositis at the patient and implant levels were 44.4% and 38.2%, respectively. For peri-implantitis, the prevalence at the patient level was 5.6%, while the prevalence at the implant level was 4.0%. The binary logistic regression identified three risk factors (smoking habits, histories of treated periodontitis and lack of peri-implant maintenance) for peri-implantitis. Conclusion Within the limitations of this study, smoking habits, history of treated periodontitis and lack of peri-implant maintenance were significant risk factors for peri-implantitis. Early detection of these factors would ensure appropriate planning and care of patients at high risk of developing peri-implant diseases.
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96
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Chatzopoulos GS, Wolff LF. Survival Rates and Factors Affecting the Outcome Following Immediate and Delayed Implant Placement: A Retrospective Study. J Clin Med 2022; 11:jcm11154598. [PMID: 35956213 PMCID: PMC9369675 DOI: 10.3390/jcm11154598] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/20/2022] [Accepted: 08/05/2022] [Indexed: 11/17/2022] Open
Abstract
Background: Immediate implant placement into extraction sockets has become a widely acceptable treatment option to decrease treatment time and enhance esthetics. The objectives of this study were to assess and compare the survival rates of immediate and delayed implant treatment as well as to investigate the effect of patient- and site-related variables on the treatment outcome in a large-scale population-based study. Methods: Dental records of patients who received implant therapy were retrieved from the electronic records of the University of Minnesota School of Dentistry. Demographic characteristics, dental insurance status, socioeconomic status as well as medical history and tobacco use were recorded. The treatment outcome was included as a binary variable (survival/failure). Time to failure (date of procedure to date of visit with failure) was compared between immediate and delayed implant treatment in Cox regression models. Kaplan−Meier plots for the survival of both treatment modalities were created. Patient-sites without failure were censored at the last follow-up visit. Results: A total of 4519 records of implants were included. The sample mean age was 60.27 years and included 50.7% males and 12.9% tobacco users. High socioeconomic status was characterized for 82.3% of the included population and 63.0% of them were self-payers. Immediate implants were significantly more frequently placed in the maxillary arch (p < 0.001) than in the mandible. Tobacco users received more often a delayed rather than an immediate implant placement (p = 0.001). The survival rate analysis revealed there were no significant differences between immediate and delayed implant placements (p = 0.48). The mean follow-up time was 32.27 months during which 1.5% immediate and 1.1% delayed implants were removed. The estimated mean survival time for immediate implants was 68.90 months, while delayed implants placed in healed sockets showed a mean survival time of 75.11 months. A statistically significant association was found between gender (p = 0.03) and osteoporosis (p = 0.001) with treatment outcome. Conclusions: The placement of immediate implants achieved similarly high survival rates when compared to delayed implants placed in healed sites. Males and osteoporotic individuals showed significantly higher implant failure than females and non-osteoporotic patients. This study demonstrated that both immediate and delayed implant placements are sound options with predictable treatment outcome.
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Affiliation(s)
- Georgios S. Chatzopoulos
- Division of Periodontology, Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, 515 Delaware St. SE, Minneapolis, MN 55455, USA
- Department of Preventive Dentistry, Periodontology and Implant Biology, School of Dentistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
- Correspondence:
| | - Larry F. Wolff
- Division of Periodontology, Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, 515 Delaware St. SE, Minneapolis, MN 55455, USA
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97
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MERAL SE, TUZ H. A Novel Design to Optimize Biomechanical Properties of Dental Implant. CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2022. [DOI: 10.33808/clinexphealthsci.1005677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Objective: The main objective of this study is to evaluate a novel design to optimize dental implant biomechanics. According to this objective, evaluations of the resilient implant design which aimed to mimic biomechanical behaviors of natural tooth have been made and outcomes were compared with natural tooth and standard dental implants with using 3D hyper-elastic finite element analysis. Methods: Models used in the study corresponding to conventional dental implant, natural tooth and resilient dental implant design. Hyperelastic model analysis were performed for close presentment of mechanical behaviors of resilient materials like periodontal ligament and medical silicone. Top values of maximum principal stress, minimum principal stress of surrounding bone and displacement of each model were evaluated under axial and non-axial loading conditions with magnitude of 30N, 80N and 100N. Results: Outcomes of finite element study showed reduction on maximum principal stress and minimum principal stress levels with the use of resilient dental implant comparing to the standard implant model. Standard implant model had been observed notably rigid in all loading conditions compared to the other models. Resilient implant model showed similar biomechanical characteristics with natural tooth model within the limitations of this study. Conclusion: According to finite element analysis results; resilient implant design was able to resolve some biomechanical discrepancies and seem to have adequate biomechanical similarity with natural tooth under both axial and non-axial loading conditions.
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Affiliation(s)
| | - Hakan TUZ
- HACETTEPE ÜNİVERSİTESİ, DİŞ HEKİMLİĞİ FAKÜLTESİ
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Lim J, Jun SH, Tallarico M, Park JB, Park DH, Hwang KG, Park CJ. A Randomized Controlled Trial of Guided Bone Regeneration for Peri-Implant Dehiscence Defects with Two Anorganic Bovine Bone Materials Covered by Titanium Meshes. MATERIALS 2022; 15:ma15155294. [PMID: 35955229 PMCID: PMC9369984 DOI: 10.3390/ma15155294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/17/2022] [Accepted: 07/21/2022] [Indexed: 12/10/2022]
Abstract
The aim of this study is to compare two low-temperature sintered anorganic bovine bone materials (ABBMs), Bio-Oss (Geistlich, Wolhusen, Switzerland) and A-Oss (Osstem, Seoul, Korea), for GBR in dehiscence defects. A single implant was placed simultaneously with GBR in the buccal or bucco-proximal osseous defect by double-layering of inner allograft and outer ABBM, covered by a preformed ultrafine titanium mesh and an absorbable collagen membrane. Grafted volume changes were evaluated by cone-beam computed tomography, taken preoperatively (T0), immediately after implant surgery (T1), after re-entry surgery (T2), and after delivery of the final restoration (T3). The density of the regenerated bone was assessed by measuring the probing depth on the buccal mid-center of the mesh after removing the mesh at T2. Postoperative sequelae were also recorded. Grafted volume shrinkage of 46.0% (0.78 ± 0.37 cc) and 40.8% (0.79 ± 0.33 cc) in the Bio-Oss group (8 patients) and A-Oss group (8 patients), respectively, was observed at T3 (p < 0.001). There were no significant differences in grafted volume changes according to time periods or bone density between the two groups. Despite postoperative mesh exposure (3 patients), premature removal of these exposed meshes and additional grafting was not necessary, and all implants were functional over the 1-year follow-up period. Both ABBMs with titanium meshes showed no significant difference in the quantity and density of the regenerated bone after GBR for peri-implant defects.
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Affiliation(s)
- JaeHyung Lim
- Department of Oral and Maxillofacial Surgery, Korea University Ansan Hospital, Ansan-si 15355, Korea;
| | - Sang Ho Jun
- Department of Oral and Maxillofacial Surgery, Korea University Anam Hospital, Seoul 02841, Korea;
| | - Marco Tallarico
- Department of Medicine, Surgery, and Pharmacy, University of Sassari, 07100 Sassari, Italy;
| | - Jun-Beom Park
- Department of Periodontics, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea;
| | - Dae-Ho Park
- Division of Oral & Maxillofacial Surgery, Department of Dentistry, College of Medicine, Hanyang University, Seoul 04763, Korea; (D.-H.P.); (K.-G.H.)
| | - Kyung-Gyun Hwang
- Division of Oral & Maxillofacial Surgery, Department of Dentistry, College of Medicine, Hanyang University, Seoul 04763, Korea; (D.-H.P.); (K.-G.H.)
| | - Chang-Joo Park
- Division of Oral & Maxillofacial Surgery, Department of Dentistry, College of Medicine, Hanyang University, Seoul 04763, Korea; (D.-H.P.); (K.-G.H.)
- Correspondence: ; Tel.: +82-2-2290-8646
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99
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Rutkowski JL. Survival Rates of Dental Implants Versus Teeth. J ORAL IMPLANTOL 2022; 48:261-262. [PMID: 36054134 DOI: 10.1563/aaid-joi-d-22-editorial.4804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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100
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Clinical Evaluation of Cement-Retained Implant-Supported CAD/CAM Monolithic Zirconia Single Crowns in Posterior Areas: Results of a 6-Year Prospective Clinical Study. PROSTHESIS 2022. [DOI: 10.3390/prosthesis4030031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background: Different technologies and materials can be used for implant-supported restorations in posterior areas. Our study aimed to evaluate the clinical performance of CAD/CAM implant-supported monolithic zirconia single crowns (ZrSCs) cemented onto titanium abutments with a dual-curing resin cement after 6 years of use. Methods: Fifty patients in need of one single crown in posterior regions were enrolled. The patients were recalled for a follow-up after 6 months and then yearly for a total observation period of 6 years. The biological and technical complications were examined using criteria set by the United States Public Health Service (USPHS), whereas visual analogue scales (VASs) were used to evaluate the patients’ aesthetic and functional satisfaction. Results: No patient was lost at follow-up; both the survival and success rates were 100%. No fractures, decementation, peri-implantitis, or soft tissue inflammation were recorded. Forty-six restorations were rated Alpha in each evaluated parameter of the USPHS’s criteria. According to the patients’ VASs assessments, the overall function of the ZrSCs was 8.4 (±2.1), whereas the overall aesthetic was 8.7 (±0.7). Conclusions: Monolithic zirconia single crowns cemented with dual-curing resin cements onto titanium abutments can be considered an effective clinical option in posterior regions after 6 years of function.
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