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Ahn JH, Lim YJ, Lee J, Baek YW, Kim MJ, Kwon HB. A One-Year Randomized Controlled Clinical Trial of Three Types of Narrow-Diameter Implants for Fixed Partial Implant-Supported Prosthesis in the Mandibular Incisor Area. Bioengineering (Basel) 2024; 11:272. [PMID: 38534546 DOI: 10.3390/bioengineering11030272] [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: 02/18/2024] [Revised: 03/05/2024] [Accepted: 03/07/2024] [Indexed: 03/28/2024] Open
Abstract
Narrow-diameter implants (NDI) serve as a solution for treating limited bone volume in the anterior mandible. This study aimed to evaluate the one-year clinical outcomes of various NDIs in the mandibular incisor area after immediate loading in partially edentulous patients. This single-center, prospective, single-blinded, randomized controlled trial study included 21 patients, with 7 patients in each of the following groups: control (BLT NC SLActive®; Straumann), experimental group 1 (CMI IS-III Active® S-Narrow; Neobiotech), and experimental group 2 (CMI IS-III Active® Narrow; Neobiotech). Using full digital flow, two fixtures were placed in each patient and immediately provisionalized on the day of surgery. Evaluations encompassed periapical radiographs, implant stability quotient (ISQ), implant stability test (IST) readings, per-implant soft tissue health, patient satisfaction surveys, and esthetic score assessments. Definitive prostheses were delivered twelve weeks post-surgery (CRiS, number: KCT0007300). Following exclusions due to low stability values (n = 2), fixture failure (n = 5), and voluntary withdrawal (n = 1), the implant success rate for patients completing all clinical protocols stood at 100%. The resulting patient failure rates in the control, experimental group 1, and experimental group 2 were 50.0%, 42.9%, and 14.3%, respectively. There were no significant differences between the groups in terms of marginal bone loss, soft tissue health, patient satisfaction, and esthetic scores. Narrow implants showed superior clinical outcomes, followed by S-Narrow and Straumann implants. Calculated one-year survival rates at the implant level were 66.7% for the control group, 85.7% for experimental group 1, and 100% for experimental group 2. All three types of NDIs showed acceptable clinical and radiographic results during the year-long observation period.
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Affiliation(s)
- Ji-Ho Ahn
- Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
| | - Young-Jun Lim
- Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
| | - Jungwon Lee
- Department of Periodontology, One-Stop Specialty Center, Seoul National University Dental Hospital, Seoul 03080, Republic of Korea
| | - Yeon-Wha Baek
- Department of Prosthodontics, Gwanak Center, Seoul National University Dental Hospital, Seoul 08826, Republic of Korea
| | - Myung-Joo Kim
- Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
| | - Ho-Beom Kwon
- Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
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Rosa C, Bento V, Duarte N, Sayeg J, Santos T, Pellizzer E. Do dental implants installed in different types of bone (I, II, III, IV) have different success rates? A systematic review and meta-analysis. Saudi Dent J 2024; 36:428-442. [PMID: 38525185 PMCID: PMC10960139 DOI: 10.1016/j.sdentj.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 11/11/2023] [Accepted: 12/18/2023] [Indexed: 03/26/2024] Open
Abstract
Purpose The objective of this systematic review and meta-analysis was to evaluate the survival rate of implants installed in bone type IV (Lekholm and Zarb, 1995) compared to that of implants installed in bone types I, II, and III. Material and methods This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines (PRISMA) and was registered in the PROSPERO International Database of Systematic Reviews (CRD42021229775). The PubMed/MEDLINE, Scopus, and Cochrane databases were searched through July 2021. The PICO question was: "Dental implants installed in type IV bone have a lower success rate when compared to implants installed in type I bone, II and III?". The established inclusion criteria were: 1) controlled and randomized clinical trials (RCT), 2) prospective and retrospective studies with at least 10 participants with dental implants, and 3) patients with dental implants installed in bone tissue types I, II, III, and IV (Lekholm and Zarb, 1985). The minimum followup duration was 1 year. Results After searching the identified databases, 117 articles were selected for full reading and 68 were excluded. Thus, 49 studies were included for qualitative and quantitative analyses. The total number of participants included was 12,056, with a mean age of 41.56 years and 29,905 implants installed. Bone types I, II, and III exhibit a lower implant failure rate when compared to bone type IV. Conclusion Dental implants installed in bone types I, II, and III showed significantly higher survival rates than those installed in type IV. The bone type I success rate was not significantly different than that of type II; however, the success rate of bone type I and II was higher than that of type III.
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Affiliation(s)
- Cleber Rosa
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP - Univ Estadual Paulista, Araçatuba, Sao Paulo, Brazil
| | - Victor Bento
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP - Univ Estadual Paulista, Araçatuba, Sao Paulo, Brazil
| | - Nathália Duarte
- Department of Basic Sciences, Araçatuba Dental School, UNESP - Univ Estadual Paulista, Araçatuba, Sao Paulo, Brazil
| | - Joao Sayeg
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP - Univ Estadual Paulista, Araçatuba, Sao Paulo, Brazil
| | - Thawan Santos
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP - Univ Estadual Paulista, Araçatuba, Sao Paulo, Brazil
| | - Eduardo Pellizzer
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP - Univ Estadual Paulista, Araçatuba, Sao Paulo, Brazil
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Hwang I, Kim TI, Cho YD. Clinical evaluation of 3.0-mm narrow-diameter implants: a retrospective study with up to 5 years of observation. J Periodontal Implant Sci 2024; 54:44-52. [PMID: 37336522 PMCID: PMC10901684 DOI: 10.5051/jpis.2300820041] [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: 02/04/2023] [Revised: 04/12/2023] [Accepted: 04/21/2023] [Indexed: 06/21/2023] Open
Abstract
PURPOSE This study aimed to evaluate the clinical outcomes of a single type of narrow-diameter implant (NDI) by investigating its survival rate and peri-implant marginal bone loss (MBL). In addition, variables possibly related to implant survival and MBL were investigated to identify potential risk factors. METHODS The study was conducted as a retrospective study involving 49 patients who had received 3.0-mm diameter TSIII implants (Osstem Implant Co.) at Seoul National University Dental Hospital. In total, 64 implants were included, and dental records and radiographic data were collected from 2017 to 2022. Kaplan-Meier survival curves and a Cox proportional hazard model were used to estimate the implant survival rate and to investigate the effects of age, sex, jaw, implant location, implant length, the stage of surgery, guided bone regeneration, type of implant placement, and the surgeon's proficiency (resident or professor) on implant survival. The MBL of the NDIs was measured, and the factors influencing MBL were evaluated. RESULTS The mean observation period was 30.5 months (interquartile range, 26.75-45 months), and 6 out of 64 implants failed. The survival rate of the NDIs was 90.6%, and the multivariate Cox regression analysis showed that age was associated with implant failure (hazard ratio, 1.17; 95% confidence interval, 1.04-1.31, P=0.01). The mean MBL was 0.44±0.75 mm, and no factors showed statistically significant associations with greater MBL. CONCLUSIONS NDIs can be considered a primary alternative when standard-diameter implants are unsuitable. However, further studies are required to confirm their long-term stability.
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Affiliation(s)
- InKyung Hwang
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea
| | - Tae-Il Kim
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea.
| | - Young-Dan Cho
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea.
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Douest Y, Forrest RM, Ter-Ovanessian B, Courtois N, Tancret F, Greer AL, Chevalier J, Fabrègue D. Machine learning-guided exploration and experimental assessment of unreported compositions in the quaternary Ti-Zr-Cu-Pd biocompatible metallic glass system. Acta Biomater 2024; 175:411-421. [PMID: 38135205 DOI: 10.1016/j.actbio.2023.12.028] [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: 09/22/2023] [Revised: 11/21/2023] [Accepted: 12/17/2023] [Indexed: 12/24/2023]
Abstract
Due to their outstanding elastic limit, biocompatible Ti-based bulk metallic glasses (BMGs) are candidate materials to decrease the size of medical implants and therefore reduce their invasiveness. However, the practical use of classical Ti-BMGs in medical applications is in part hindered by their high copper content: more effort is thus required to design low-copper Ti-BMGs. In this work, in line with current rise in AI-driven tools, machine learning (ML) approaches, a neural-network ML model is used to explore the glass-forming ability (GFA) of unreported low-copper compositions within the biocompatible Ti-Zr-Cu-Pd system. Two types of models are trained and compared: one based on the alloy composition only, and a second based on various features derived from the alloying elements. Contrary to expectation, the predictive power of both models in evaluating GFA is similar. The compositional space identified by ML as promising is experimentally assessed, finding unfortunately low GFA. These results indicate that the ML approach may be premature for specific composition tuning of amorphous metallic materials. We emphasise that the development of ML tools in GFA prediction requires an improvement of the dataset, in terms of homogeneity, size and GFA descriptors, which must be supported by increased reporting of high-quality experimental GFA measurements, both positive and negative. STATEMENT OF SIGNIFICANCE: Biocompatible Ti-based bulk metallic glasses (BMGs) are candidate materials for use in the next generation of minimally invasive dental implants where improved mechanical properties, such as high strength are required. Despite promising in vitro/vivo evaluations, implementation of alloys for practical applications is partly hindered by the presence of copper as the main alloying element. Recent studies have presented AI-guided and machine learning strategies as appealing approaches to understand and describe the glass forming ability (GFA) of BMG-forming compositions. In this work, we employ and evaluate the capacity of a machine-learning model to explore low-copper compositional spaces in the biocompatible Ti-Zr-Cu-Pd system. Our results highlight the limits of such a computational approach and suggest improvements for future designing routes.
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Affiliation(s)
- Yohan Douest
- Anthogyr SAS, 2237 Avenue André Lasquin, 74700 Sallanches, France; INSA-Lyon, Université de Lyon, UMR CNRS 5510 MATEIS, 20 Avenue Albert Einstein, 69621 Villeurbanne CEDEX, France.
| | - Robert M Forrest
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Benoit Ter-Ovanessian
- INSA-Lyon, Université de Lyon, UMR CNRS 5510 MATEIS, 20 Avenue Albert Einstein, 69621 Villeurbanne CEDEX, France
| | - Nicolas Courtois
- Anthogyr SAS, 2237 Avenue André Lasquin, 74700 Sallanches, France
| | - Franck Tancret
- Université de Nantes, Institut des Matériaux Jean Rouxel (IMN), UMR CNRS 6502, Polytech Nantes, Rue Christian Pauc, BP 50609, 44306 Nantes CEDEX 3, France
| | - A Lindsay Greer
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Jérôme Chevalier
- INSA-Lyon, Université de Lyon, UMR CNRS 5510 MATEIS, 20 Avenue Albert Einstein, 69621 Villeurbanne CEDEX, France
| | - Damien Fabrègue
- INSA-Lyon, Université de Lyon, UMR CNRS 5510 MATEIS, 20 Avenue Albert Einstein, 69621 Villeurbanne CEDEX, France
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Assaf A, Saad M, Hijawi S. Use of narrow-diameter implants in the posterior segments of the jaws: A retrospective observational study of 2 to 11 years. J Prosthet Dent 2023; 130:840-848. [PMID: 35190196 DOI: 10.1016/j.prosdent.2022.01.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 12/30/2021] [Accepted: 01/04/2022] [Indexed: 12/14/2022]
Abstract
STATEMENT OF PROBLEM The placement of narrow-diameter implants (NDIs) in the posterior region is still debated in view of the high biomechanical risks in these areas. PURPOSE The purpose of this retrospective observational study was to evaluate the success and survival rates of NDIs restored with fixed prostheses in the posterior region (primary outcome) and analyze whether splinting multiple units (prosthesis design) affects the biological and mechanical complications (secondary outcome). MATERIAL AND METHODS Dental records from 2 private clinics were reviewed for NDIs in the posterior region installed between 2009 and 2018. Ninety study participants (58 women and 32 men) aged between 21 and 84 years (mean age 49.9 years) were recalled for the assessment of implant survival and success of 160 NDIs previously provided for partial posterior edentulism associated with moderate horizontal bone loss or reduced interradicular space (105 premolars and 55 molars). The implants were restored with metal-ceramic single crowns or splinted multiple-unit prostheses, either screw-retained or cemented on custom (n=100) or stock titanium abutments (n=60). Peri-implant probing depth (PPD), bleeding on probing (BOP), bone quality, type of edentulism, and patient satisfaction were scored. The chi-squared test for independence and 2-sample Welch t test were performed for statistical analysis (α=.05). RESULTS The overall success rate was 89.37%. One implant had been removed 4 years after loading, another after 9 years, yielding a cumulative survival rate of 98.75%. Fourteen implants exhibited PPD > 5 mm. One implant and 1 abutment screw fractured, and 16 restorations demonstrated porcelain chipping. The chi-squared test showed no significant relationship between prosthetic design and complications whether biological (P=.087) or mechanical (P=.805). Eighty-two percent of patients were satisfied with esthetics, 76% with function, 85% with total duration of treatment, and 90% with overall treatment cost. CONCLUSIONS Within the limitations of this retrospective study, NDIs may be considered a reliable option to replace posterior teeth. The prosthetic design had no significant impact on biological or mechanical complications.
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Affiliation(s)
- André Assaf
- Clinical Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Beirut Arab University, Beirut, Lebanon; Former Head, Dental Biomaterials and Technology Unit, Faculty of Dentistry, Lebanese University, Beirut, Lebanon.
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Bhumpattarachai S, Kan JYK, Goodacre CJ, Swamidass RS, Al-Ardah A, Rungcharassaeng K, Lozada J. Effects of cyclic loading on loss of abutment screw torque of angled screw channel single implant crowns on narrow diameter implants. J Prosthet Dent 2023; 130:741.e1-741.e9. [PMID: 37689572 DOI: 10.1016/j.prosdent.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 09/11/2023]
Abstract
STATEMENT OF PROBLEM Screw access channels that emerge on the facial aspect of anterior screw-retained implant crowns can compromise esthetics. Recently, angled screw channels (ASCs) have been developed that can alter screw access channel angulations to improve esthetics. While ASCs can be used on narrow-diameter implants, information is limited on the loss of abutment screw torque on narrow-diameter implants with ASCs. PURPOSE The purpose of this in vitro study was to compare the loss of abutment screw torque after thermocycling and the cyclic loading of ASCs from 3 different companies connected to narrow-diameter implants. MATERIAL AND METHODS A total of 40 narrow-diameter implants (NobelReplace Conical Connection 3.5×11.5 mm) were mounted individually in acrylic resin blocks and divided equally into 4 groups. The first group, NB-0 (Control), consisted of screw-retained zirconia crowns fabricated on ASCs at 0-degree angulation (n=10). The other 3 groups consisted of a total of 30 screw-retained zirconia crowns fabricated on ASCs at 20-degree angulation: NB-20 (Angulated Screw Channel Solutions), ATL-20 (Atlantis Custom Base Solution with angulated screw access), and DA-20 (Dynamic TiBase). Each crown was secured on the mounted implant with its corresponding titanium base insert and screw and then tightened to the manufacturer's recommended torque with a digital torque gauge. The initial reverse torque value (RTVI) was obtained and recorded at baseline. Subsequently, a new set of screws were tightened to recommended values, and each specimen underwent thermocycling and then cyclic loading at 0 to 100 N at 10 Hz for 1 million cycles to simulate 1year of functional loading. After cyclic loading, the final reverse torque values (RTVF) were recorded and compared with the RTVI to evaluate the percentage torque loss (PTLF). Statistical analysis was performed using the Kruskal-Wallis analysis, Rank base analysis of covariance (ANCOVA), and the Tukey HSD post hoc comparisons (α=.05). RESULTS Significant differences were found for the PTLF among all groups after cyclic loading (P<.001). The PTLF in ATL-20 (51.4%) was significantly higher than in NB-0 (22.2%) (P<.001) and NB-20 (29.2%) (P=.010). No significant difference was found in the PTLF among other groups (P>.05). CONCLUSIONS The abutment screw torque loss after cyclic loading of the ASCs on narrow diameter implants among the 4 groups did not perform comparably. The largest percentage torque loss was recorded for the ATL-20 group. The NB-20 group demonstrated the lowest percentage torque loss. DA-20 showed percentage torque loss less than ATL-20; however, its RTVF was the lowest.
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Affiliation(s)
- Sasiya Bhumpattarachai
- Assistant Professor, Department of General Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif; Research Associate, Advanced Dental Education Program in Implant Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif.
| | - Joseph Y K Kan
- Professor, Advanced Dental Education Program in Implant Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif
| | - Charles J Goodacre
- Distinguished Professor, Advanced Dental Education Program in Implant Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif
| | - Rajesh S Swamidass
- Assistant Clinical Professor, Advanced Dental Education Program in Implant Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif
| | - Aladdin Al-Ardah
- Associate Professor, Advanced Dental Education Program in Implant Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif
| | | | - Jaime Lozada
- Professor and Program Director, Advanced Education Program in Implant Dentistry, School of Dentistry, Loma Linda University, Loma Linda, Calif
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Kim JE, Yoon Y, Pae A, Kwon YD. Clinical outcome of narrow diameter dental implants: a 3-year retrospective study. Maxillofac Plast Reconstr Surg 2023; 45:26. [PMID: 37526800 PMCID: PMC10393933 DOI: 10.1186/s40902-023-00394-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/21/2023] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND This study aimed to analyze the clinical outcome and complications of narrow-diameter dental implants (NDIs) (diameter ≤3.5 mm). METHODS The 274 NDIs that met the selection criteria from 2013 to 2018 were included in the retrospective study, and the survival rates (SVR) were compared. Mechanical complications included screw loosening and fractures of the implant components, such as the implant fixture, abutment, and prosthesis. In addition, marginal bone loss (MBL) was measured immediately after surgery and 1 year after loading. RESULTS The 3-year cumulative SVR was 92.4%. Nineteen fixtures failed during the follow-up. The failure rate was significantly higher (OR=4.573, p<0.05) in smokers and was significantly higher in osteoporosis patients (OR=3.420, p<0.05). The vertical and horizontal values of MBL were 0.33±0.32 mm and 0.18±0.17 mm, respectively. Mechanical complications included screw loosening (5.5%) and porcelain fracture (2.2%), but no fractures of the fixture or components were observed. The choice of titanium and zirconium (TiZr) alloy implant was significantly more frequent in the posterior region. Bone graft was significantly more frequently done in the anterior region. CONCLUSIONS According to the high SVR and stability of NDIs, the findings of the study suggest that NDIs may be a replacement for regular diameter dental implants (RDIs) and the use of TiZr alloy could extend the indication of NDIs. In the esthetic area, contour augmentation may be a reason for increasing the frequency of bone grafts.
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Affiliation(s)
- Jae-Eun Kim
- Department of Dentistry, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Youngjae Yoon
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Ahran Pae
- Department of Prosthodontics, College of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Yong-Dae Kwon
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Kyung Hee University, Seoul, Republic of Korea.
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Pesce P, Del Fabbro M, Modenese L, Sandron S, Francetti L, Isola G, Canullo L, Menini M. Influence of implant diameter on implant survival rate and clinical outcomes in the posterior area: a systematic review and meta-analysis. BMC Oral Health 2023; 23:235. [PMID: 37085829 PMCID: PMC10122303 DOI: 10.1186/s12903-023-02962-8] [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: 10/01/2022] [Accepted: 04/11/2023] [Indexed: 04/23/2023] Open
Abstract
OBJECTIVE The aim of the present systematic review was to test the hypothesis that the diameter of implants inserted in the posterior area affects implant survival rate, prosthetic survival rate and peri-implant parameters (bleeding on probing (BoP), marginal bone loss (MBL), pocket probing depth (PPD)). MATERIALS AND METHODS An electronic search of studies published until December 2021 was done on three databases (Pubmed, Scopus, Cochrane) independently by two authors. Clinical trials comparing implant survival rate, BoP, MBL and PPD among narrow diameter implants (NDI: ≥ 3.0 mm to < 3.75 mm) and regular diameter implants (RDI ≥ 3.75 mm to < 5 mm) were included. Data were independently extracted by two reviewers. Risk of bias was evaluated according to the Cochrane risk-of-bias tool for randomized studies and to the Joanna Briggs Institute Critical Appraisal tools for non-randomized ones. A pair-wise meta-analysis was conducted on the included studies. RESULTS Seven articles were included out of the 4291 identified from the digital research. Overall, a total of 939 implants were inserted (319 NDI, 620 RDI). Only one study was judged at serious risk of bias. No statistically significant difference was found in implant survival rate (risk ratio 1.01 (95% CI [0.98 to 1.04], P = 0.67)) while the difference was significant for BoP (mean difference 2.89 (95% CI [0.30 to 5.48] mm, P = 0.03)) with higher values for NDI. Higher MBL was identified among regular diameter implants (mean difference -0.15 mm (95% CI [-0.32 to 0.01 mm], P = 0.07). No statistically significant differences were identified for prosthetic survival and PPD. CONCLUSIONS No differences were found in implant survival rate between narrow and regular implants. A higher BoP was identified among narrow implants, but there was no higher bone loss. It is not possible to draw definitive conclusions about the use of narrow-diameter implants in the posterior region.
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Affiliation(s)
- Paolo Pesce
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Ospedale S. Martino, L. Rosanna Benzi 10, 16132, Genoa, Italy.
| | - Massimo Del Fabbro
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Laura Modenese
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
- IRCCS Orthopedic Institute Galeazzi, Dental Clinic, Milan, Italy
| | - Stefano Sandron
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Ospedale S. Martino, L. Rosanna Benzi 10, 16132, Genoa, Italy
| | - Luca Francetti
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
- IRCCS Orthopedic Institute Galeazzi, Dental Clinic, Milan, Italy
| | - Gaetano Isola
- Department of General Surgery and Surgical-Medical SpecialtiesSchool of Dentistry, University of Catania Via S, Sofia 78, Pad. 2 Piano -1 Stanza 53, 95124, Catania, Italy
| | - Luigi Canullo
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Ospedale S. Martino, L. Rosanna Benzi 10, 16132, Genoa, Italy
| | - Maria Menini
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Ospedale S. Martino, L. Rosanna Benzi 10, 16132, Genoa, Italy
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Use of Narrow-Diameter Implants in Completely Edentulous Patients as a Prosthetic Option: A Systematic Review of the Literature. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5571793. [PMID: 34239926 PMCID: PMC8241526 DOI: 10.1155/2021/5571793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/15/2021] [Accepted: 06/10/2021] [Indexed: 11/26/2022]
Abstract
Objective The objective of the present review is to assess the implant survival, marginal bone loss, and biomechanical features of narrow-diameter implants (2.5-3.5 mm) supporting or retaining full-arch fixed or removable restorations. Materials and Methods Three operators screened the literature (PubMed, Cochrane Library, and Google Scholar) and performed a hand search on the main journals that focus on implantology until 24 March 2019. Only articles that considered full-arch restorations supported or retained by narrow-diameter implants (2.5-3.5 mm) were considered if they have a minimum of 10 patients and a mean follow-up of at least 6 months. The outcome variables were survival of implants and marginal bone loss. The review was performed according to the PRISMA statements. Risk of bias assessment was evaluated. Failure rates were analyzed using random effect Poisson regression models to obtain the summary estimate of 5-year survival rate and marginal bone loss. Results A total of nine papers were finally selected, reporting a high survival rate of the implants. Eight studies focused only on the mandible while one study reported data from both mandible and maxilla. All studies reported on removable restorations; none focused on fixed rehabilitations. The estimated survival rate for 5 years of follow-up was calculated to be 92.25% for the implants. The estimated marginal bone loss after 5 years was calculated to be 1.40 mm. No study reported implant fractures. Conclusions With the limitations of the present study, there is evidence that 2.5-3.5 mm narrow-diameter implants retaining a removable restoration can be a successful treatment in fully edentulous patients. No data on fixed restorations was available.
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Knobloch LA, Larsen P, McGlumphy E, Kim DG, Gohel A, Messner R, Fogarty KJ, Fogarty MT. Prospective cohort study to evaluate narrow diameter implants for restoration of a missing lateral incisor in patients with a cleft palate: One-year results. J Prosthet Dent 2021; 128:1265-1274. [PMID: 34034898 DOI: 10.1016/j.prosdent.2021.03.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 11/17/2022]
Abstract
STATEMENT OF PROBLEM Patients diagnosed with a cleft palate often have a congenitally missing maxillary lateral incisor. The congenital cleft presents the practitioner with challenges including the quantity and quality of bone, a surgically managed cleft correction, and limited clinical space. PURPOSE The purpose of the present prospective investigation was to report preliminary results at the 1-year follow-up for this planned 5-year investigation of narrow diameter implants used to restore a missing lateral incisor in patients with a cleft palate. MATERIAL AND METHODS Fourteen study participants with a cleft palate and a missing maxillary lateral incisor were enrolled based on established criteria. Narrow diameter implants (AstraTech OsseoSpeed TX 3.0S and 3.5 mm) were placed by using a 2-stage protocol and restored. All study participants received an Atlantis abutment and a cement-retained crown. Four probing depth measurements and bleeding on probing were measured at baseline and at 1 year. Probing depth measurements were evaluated using a 2-way repeated measures ANOVA with Tukey-Kramer multiple comparisons tests. Radiographic marginal bone loss was measured at 1-year by using a digital subtraction technique and evaluated by using a repeated measures ANOVA. Pretreatment cone beam computed tomography (CBCT) images were used to measure a mean gray level that was proportional to bone mineral density (BMD) in the implant site. One-way mixed ANOVA was used to compare the mean gray level and average implant stability quotient (ISQ) loading. A Pearson correlation was also tested between those parameters (α=.05) for each statistical analysis. RESULTS The mean marginal bone loss at 1 year was 0.601 ±0.48 mm. Regarding probing depth measurements, a 2-way repeated measures ANOVA found both the location (P=.012) and time (P=.009) were significant. The Tukey-Kramer multiple comparisons test showed a significant difference between the buccal and distal site (P=.006) from baseline to 1-year follow-up. CONCLUSIONS Narrow diameter implants are a reliable treatment for replacing a missing lateral incisor in patients with a cleft palate at 1 year, with an implant survival rate of 100% and implant success rate of 94% using the established criteria. A negative association was found between the bone mineral density and the implant stability in the alveolar cleft site of a patient with a cleft palate. The peri-implant soft tissue probe depths exhibited significant change during the first year.
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Affiliation(s)
- Lisa A Knobloch
- Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio.
| | - Peter Larsen
- Professor, Division of Oral and Maxillofacial Surgery, The Ohio State University College of Dentistry, Columbus, Ohio
| | - Edwin McGlumphy
- Professor Emeritus, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio; Private practice, Columbus, Ohio
| | - Do-Gyoon Kim
- Professor, Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, Ohio
| | - Anita Gohel
- Clinical Professor, Division of Oral and Maxillofacial Radiology, University of Florida College of Dentistry, Gainesville, Fla
| | - Robin Messner
- Implant Patient Care Coordinator, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio
| | - Kyle J Fogarty
- Student, College of Arts and Sciences, The Ohio State University, Columbus, Ohio
| | - Matthew T Fogarty
- Student, Fisher College of Business, The Ohio State University, Columbus, Ohio
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11
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Hultin K, Eriksson A, Backe C, Johansson U, Bougas K. A Pilot Study with Randomised Controlled Design Comparing TiZr Alloy Dental Implants to Ti Implants. EJOURNAL OF ORAL MAXILLOFACIAL RESEARCH 2020; 11:e3. [PMID: 33598111 PMCID: PMC7875101 DOI: 10.5037/jomr.2020.11403] [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: 10/12/2020] [Accepted: 12/28/2020] [Indexed: 11/16/2022]
Abstract
Objectives Evidence on the clinical performance of recently introduced dental implants in titanium-zirconium alloy is sparse. The aim of the present pilot study with randomized controlled design is to compare changes in supporting structures around dental titanium-zirconium alloy implants to commercially pure titanium implants. Material and Methods The present material includes consecutive patients referred to a specialist clinic in Sweden. Two patient groups treated with dental implants in two different materials - titanium (Ti) and titanium-zirconium (TiZr) - were defined after block randomisation for smoking. In total, 40 implants installed in 21 patients were available for one-year follow-up. Marginal bone level, soft tissue height and width of keratinised mucosa were registered at baseline and at one-year follow-up. Results At implant level, the test group (TiZr) yielded significant marginal bone loss (P < 0.001) after one year. Additionally, marginal bone loss after one year was significantly higher for TiZr implants (P < 0.001) as compared to traditional Ti implants. Soft tissue dimensions were stable throughout the evaluation time for both implant materials. Conclusions One-year results indicate more pronounced initial marginal bone loss for dental implants in titanium-zirconium alloy as compared to implants made of commercially pure titanium.
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Affiliation(s)
- Kristina Hultin
- Department of Prosthodontics, Södra Älvsborg Hospital, BoråsSweden
| | - Annelie Eriksson
- Department of Oral and Maxillofacial Surgery, Södra Älvsborg Hospital, BoråsSweden
| | - Christina Backe
- Department of Oral and Maxillofacial Surgery, Södra Älvsborg Hospital, BoråsSweden
| | - Ulf Johansson
- Department of Oral and Maxillofacial Surgery, Södra Älvsborg Hospital, BoråsSweden
| | - Kostas Bougas
- Department of Periodontology, Södra Älvsborg Hospital, BoråsSweden
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12
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Cruz RS, Lemos CAA, de Batista VES, Yogui FC, Oliveira HFF, Verri FR. Narrow-diameter implants versus regular-diameter implants for rehabilitation of the anterior region: a systematic review and meta-analysis. Int J Oral Maxillofac Surg 2020; 50:674-682. [PMID: 33158693 DOI: 10.1016/j.ijom.2020.10.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 09/16/2020] [Accepted: 10/02/2020] [Indexed: 12/26/2022]
Abstract
The aim of this systematic review and meta-analysis was to evaluate studies comparing implant survival rates, marginal bone loss (MBL), and mechanical and biological complication rates between narrow-diameter implants (NDIs) and regular-diameter implants (RDIs) used for oral rehabilitation in the anterior region. The review was conducted according to the PRISMA checklist. Two independent reviewers performed a comprehensive search of the PubMed/MEDLINE, Embase, Scopus, and Cochrane Library databases for studies published until May 2020. A total of 843 implants (484 NDIs and 359 RDIs) were included. No significant difference in implant survival rate (risk difference (RD) 0.01, 95% confidence interval (CI) -0.01 to 0.03; P=0.34), MBL (standardised mean difference -0.51mm, 95% CI -1.29 to 0.26mm; P=0.19), mechanical complications (RD 0.01, 95% CI -0.02 to 0.04; P=0.40), or biological complications (RD 0.01, 95% CI -0.09 to 0.11; P=0.85) was found between the implant groups. Within the limitations of this study, it is concluded that NDIs are an effective alternative to RDIs due to similar survival rates, MBL, and mechanical and biological complication rates. However, future studies are highly encouraged due to the small number of interventional studies on this topic.
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Affiliation(s)
- R S Cruz
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil.
| | - C A A Lemos
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Governador Valadares, Governador Valadares, MG, Brazil
| | - V E S de Batista
- Department of Prosthodontics, Presidente Prudente Dental School, University of the West of São Paulo (UNOESTE), Presidente Prudente, Brazil
| | - F C Yogui
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil
| | - H F F Oliveira
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil
| | - F R Verri
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil
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13
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Barker E, AlQobaly L, Shaikh Z, Franklin K, Moharamzadeh K. Implant Soft-Tissue Attachment Using 3D Oral Mucosal Models-A Pilot Study. Dent J (Basel) 2020; 8:E72. [PMID: 32645887 PMCID: PMC7558259 DOI: 10.3390/dj8030072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/23/2020] [Accepted: 07/03/2020] [Indexed: 01/25/2023] Open
Abstract
PURPOSE The aim of this study was to investigate soft-tissue attachment to different metal, ceramic, and polymer implant surfaces using an inflamed, three-dimensional (3D), tissue-engineered, human oral mucosal model, as well as multiple-endpoint qualitative and quantitative biological approaches. METHODS Normal human oral fibroblasts, OKF6/TERT-2 keratinocytes and THP-1 monocytes were cultured, and full-thickness, 3D oral mucosal models were engineered inside tissue culture inserts. Sand-blasted and acid-etched (SLA) and machined (M) titanium-zirconium alloy (TiZr; commercially known as Roxolid; Institut Straumann AG, Switzerland), ceramic (ZrO2), and polyether ether ketone (PEEK) rods (Ø 4 mm × 8 mm) were inserted into the center of tissue-engineered oral mucosa following a Ø 4mm punch biopsy. Inflammation was simulated with addition of the lipopolysaccharide (LPS) of Escherichia coli (E. coli) and tumor necrosis factor (TNF)-alpha to the culture medium. Implant soft-tissue attachment was assessed using histology, an implant pull-test with PrestoBlue assay, and scanning electron microscopy (SEM). RESULTS Inflamed, full-thickness, 3D human oral mucosal models with inserted implants were successfully engineered and histologically characterized. The implant pull-test with PrestoBlue assay showed higher viability of the tissue that remained attached to the TiZr-SLA surface compared to the other test groups. This difference was statistically significant (p < 0.05). SEM analysis showed evidence of epithelial cell attachment on different implant surfaces. CONCLUSIONS The inflamed, 3D, oral mucosal model has the potential to be used as a suitable in vitro test system for visualization and quantification of implant soft-tissue attachment. The results of our study indicate greater soft tissue attachment to TiZr-SLA compared to TiZr-M, ceramic, and PEEK surfaces.
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Affiliation(s)
| | | | | | | | - Keyvan Moharamzadeh
- School of Clinical Dentistry, University of Sheffield, Western Bank, Sheffield S10 2TN, UK; (E.B.); (L.A.); (Z.S.); (K.F.)
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14
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Yang G, Chen L, Gao Y, Liu H, Dong H, Mou Y. Risk factors and reoperative survival rate of failed narrow‐diameter implants in the maxillary anterior region. Clin Implant Dent Relat Res 2019; 22:29-41. [PMID: 31797552 DOI: 10.1111/cid.12867] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/04/2019] [Accepted: 10/23/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Guangwen Yang
- Department of Oral Implantology Nanjing Stomatological Hospital, Medical School of Nanjing University Nanjing Jiangsu China
| | - Li Chen
- Department of Oral Implantology Nanjing Stomatological Hospital, Medical School of Nanjing University Nanjing Jiangsu China
| | - Ying Gao
- The 461 Clinical Department of the 964 Hospital of People's Liberation Army Changchun Jilin China
| | - Hui Liu
- Department of Oral Implantology Nanjing Stomatological Hospital, Medical School of Nanjing University Nanjing Jiangsu China
| | - Heng Dong
- Department of Oral Implantology Nanjing Stomatological Hospital, Medical School of Nanjing University Nanjing Jiangsu China
| | - Yongbin Mou
- Department of Oral Implantology Nanjing Stomatological Hospital, Medical School of Nanjing University Nanjing Jiangsu China
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15
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Wang B, Ho KS, Neo TK, Cheng AC. Mini-dental implants for definitive prosthesis retention - A synopsis of the current evidence. SINGAPORE DENTAL JOURNAL 2019; 39:1-9. [PMID: 31672092 DOI: 10.1142/s2214607519300015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Background: This narrative review provides an evidence-based overview of the comparison between mini-dental implants (MDI) and conventional dental implants for definitive prosthesis retention. In addition, recommendations are made on whether the use of reduced diameter dental implants is more appropriate. Method: A literature review was conducted via electronic search addressing the following topics: (1) osseointegration, (2) peri-implant soft tissue characteristics, (3) biomechanics, (4) implant survival and (5) implant success. Conclusion: The procedure for dental implant prosthetic rehabilitation should preferentially include conventional dental implants (i.e. [Formula: see text][Formula: see text]mm fixture diameter). Small (3-3.25[Formula: see text]mm) and narrow (3.3-3.5[Formula: see text]mm) dental implants should primarily be used in non-load-bearing regions. MDI ([Formula: see text][Formula: see text]mm) should be considered to retain definitive prosthesis, only for reasons of anatomy or patient-centred preferences and as a last resort. If MDI are to be used, patients should be made aware of the lack of long-term, high-quality evidence as a part of the informed consent process and that most of the prospective data available pertain to MDI retaining complete dentures.
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Affiliation(s)
- Ben Wang
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
| | - Kok Sen Ho
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
| | - Tee Khin Neo
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
| | - Ansgar C Cheng
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
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16
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Ma M, Qi M, Zhang D, Liu H. The Clinical Performance of Narrow Diameter Implants Versus Regular Diameter Implants: A Meta-Analysis. J ORAL IMPLANTOL 2019; 45:503-508. [PMID: 31536434 DOI: 10.1563/aaid-joi-d-19-00025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The purpose of this study is to analyze 1- and 3-year clinical performances of narrow diameter implants (NDIs) versus regular diameter implants (RDIs). A search of electronic databases and a manual search was performed for the time period January 2000 to April 2018. A meta-regression was used to evaluate the effects of the "fixed effects" model on the implant survival rates, prosthesis success rates and marginal bone loss (MBL) with follow-up time of 1 year and 3 years. Of the 11 studies included, the overall combined 1-year implant survival rates were 98.14% for NDIs and 98.20% for RDIs. The overall combined 3-year implant survival rates were 98.71% for NDIs and 98.84% for RDIs. The corresponding values for 1-year prosthesis success rates were 96.94% for NDIs and 99.25% for RDIs. The corresponding values for 3-year prosthesis success rates were 89.25% for NDIs and 96.55% for RDIs. The meta-regression showed no significant differences between NDIs and RDIs regarding implant survival rates, prosthesis success rates, and MBL in 1-year and 3-year follow-up (P > .05). The results of this meta-analysis concluded that the implant diameter did not affect its survival rates, prosthesis success rates, and MBL in 1 and 3 years. The use of NDIs instead of bone augmentation procedures with RDIs did not affect its survival rates, prosthesis success rates, and MBL in the short-term and middle-term. However, more high-quality randomized controlled trials and long follow-up studies are needed on this topic.
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Affiliation(s)
- Meng Ma
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Institute of Stomatology, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Mengxing Qi
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Dongsheng Zhang
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Hongchen Liu
- Institute of Stomatology, Chinese People's Liberation Army General Hospital, Beijing, China
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17
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Sammour SR, Maamoun El-Sheikh M, Aly El-Gendy A. Effect of implant abutment connection designs, and implant diameters on screw loosening before and after cyclic loading: In-vitro study. Dent Mater 2019; 35:e265-e271. [PMID: 31427043 DOI: 10.1016/j.dental.2019.07.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 05/14/2019] [Accepted: 07/25/2019] [Indexed: 10/26/2022]
Abstract
AIMS The purpose of this in-vitro study was to evaluate the screw loosening of two different forms of implant abutment connection designs, and two implant diameters by measuring removal torque value (RTV) before and after cyclic loading. MATERIALS AND METHODS Twenty implant fixtures were divided equally into 2 groups (N=10): group I fixture with conical hybrid connection (CH), and group II fixture with internal hex connection (IH). Each group was divided equally into two subgroups according to implant diameters: subgroup A (3.3mm), and subgroup B (4.2mm). Each fixture was vertically placed in the center of an acrylic resin block. The samples were fixed to the jig, and an implant abutment connected it with a 20 Ncm tightening torque. The samples were subjected to eccentric cyclic loading (at a distance of 5mm) away from center of abutment at 100,000 cycles. A digital torque gauge was used to evaluate screw loosening by measuring RTVs in (Ncm) before and after cyclic loading. The removal torque loss ratio before and after cyclic loading and the removal torque loss ratio between before and after cyclic loading were calculated and analyzed using the SPSS statistical analysis. RESULTS For GI the initial removal torque loss ratio measurement was (14.45±3.18) and decreased significantly after loading, it was (11.47±3.64). For GII the initial removal torque loss ratio measurement was (20.47±4.99) and increased significantly after loading, being (35.35±4.26). There is no significant effect upon screw loosening for two implant diameters. CONCLUSION Within the limitations of this study, the results suggested that conical hybrid connections showed a better screw stability than an internal hex connection. Therefore, the use of conical implants can be promoted as they have better screw stability compared to other systems.
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Affiliation(s)
- Sara Reda Sammour
- Prosthodontic department, Faculty of Dentistry, University of Tanta, Egypt.
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18
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Reis TAD, Zancopé K, Karam FK, Neves FDD. Biomechanical behavior of extra-narrow implants after fatigue and pull-out tests. J Prosthet Dent 2019; 122:54.e1-54.e6. [PMID: 31202549 DOI: 10.1016/j.prosdent.2019.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 04/03/2019] [Accepted: 04/03/2019] [Indexed: 10/26/2022]
Abstract
STATEMENT OF PROBLEM Narrow implants have limited indications, and implant fracture may occur when these indications are not followed. PURPOSE The purpose of this in vitro study was to investigate the mechanical behavior of a 2.9-mm-diameter implant using a fatigue limit test and to investigate the Morse effect of 2 different Morse taper systems, 2.9-mm-diameter (FAC group) and 3.75-mm-diameter (CM group) implants, using a pull-out test. The null hypothesis was that the tensile strengths of the components for both systems would be similar. MATERIAL AND METHODS The fatigue properties of 13 specimens under 6 loads were determined. The test was performed at 15 Hz and for 5×106 cycles. In the pull-out test, the specimens were divided into 2 groups (n=8), the FAC group (2.9-mm-diameter) and the CM group (3.75-mm-diameter). Statistical analysis for the pull-out test was performed with the Student t test (α=.05). RESULTS Thirteen specimens underwent the fatigue test. Only 5 did not fail when subjected to the frequency and number of cycles examined. Three of the specimens did not fail under a load of 130 N. The pull-out test showed a significant difference between the FAC and CM groups (P<.001). CONCLUSIONS According to the fatigue test, the extra-narrow implant (Facility; Neodent) was compatible with the low masticatory effort regions, as indicated by the manufacturer. The better performance of the FAC group in the pull-out test may be due to its design, which promotes the pure Morse effect in the implant-abutment interface, and the angulation of its internal conical portion.
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Affiliation(s)
- Taís Alves Dos Reis
- Doctoral student, Department of Occlusion, Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil
| | - Karla Zancopé
- Professor, Department of Occlusion, Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil
| | - Frederick Khalil Karam
- Professor, Department of Implantology and Oral Rehabilitation, School of Dentistry, University of Rio Verde (UniRV), Rio Verde, Brazil
| | - Flávio Domingues das Neves
- Professor, Department of Occlusion, Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil.
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19
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Marginal Bone Loss Around One-Piece Implants: A 10-Year Radiological and Clinical Follow-up Evaluation. IMPLANT DENT 2019; 28:237-243. [PMID: 31124820 DOI: 10.1097/id.0000000000000861] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
PURPOSE This study was conducted to investigate one-piece narrow-diameter implants installed in maxillary lateral and mandibular incisor sites using immediate nonfunctional loading. MATERIALS AND METHODS In this 10-year clinical trial study, 42 narrow-diameter (3.0-mm) one-piece implants for 35 patients were inserted. Clinical and radiographic measurements were recorded in 10 years and analyzed statistically using t test. RESULTS A total of 26 patients (20 females and 6 males) with 30 implants were available for the 10-year follow-up. The 10-year implant survival rate was 100%. A statistically significant mean marginal bone loss was observed between 12 months and 10 years (0.18 ± 0.29 mm). The mean pocket depth increase was statistically significant (0.68 ± 0.83 mm). No bleeding on probing was observed around 90% of the implants. Full-mouth plaque index was registered at 20% of the implants. CONCLUSION The results obtained in this analysis suggest that modest marginal bone loss was observed around the implants. One-piece narrow-diameter implants (Maximus 3.0; BioHorizons) can predictably restore missing maxillary lateral incisors and mandibular incisors in cases of careful patient selection.
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20
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Yin L, Chang Y, You Y, Liu C, Li J, Lai HC. Biological responses of human bone mesenchymal stem cells to Ti and TiZr implant materials. Clin Implant Dent Relat Res 2019; 21:550-564. [PMID: 31009155 DOI: 10.1111/cid.12756] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 01/06/2019] [Accepted: 01/29/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Titanium-zirconium alloy (TiZr1317) is a new material used for biological implants. There are several studies on the effects of TiZr implants on the biological characteristics of human bone mesenchymal stem cells (hBMSCs). PURPOSE The purpose of this study was to investigate the biological responses of hBMSCs to implant holes affected by the physicochemical properties of oral implants (TiSLA , TiSLActive , TiZrSLA , and TiZrSLActive ). MATERIALS AND METHODS Grade 4 Ti and TiZr (13-17% Zr) substrates were modified by sand-blasted large-grit acid-etched (SLA) or hydrophilic sand-blasted large-grit acid-etched (SLActive), resulting in four types of surface with complex microstructures corresponding to the commercially-available implants SLA, RoxolidSLA, SLActive, and RoxolidSLActive (Institute Straumann AG, Basel, Switzerland). Physicochemical properties were detected and the biological responses of hBMSCs were observed. RESULTS Surface morphology characterization by scanning electron microscopy and atomic force microscopy revealed differences between the four groups. SLActive had higher surface energy/wettability than SLA, indicating that increased surface energy/wettability can promote the absorption of osteogenic proteins and enhance osseointegration. hBMSCs seeded on SLActive substrates exhibited better performance in terms of cell attachment, proliferation and osteoblastic differentiation than cells seeded on SLA. CONCLUSION Because of their more suitable physicochemical properties, TiSLActive and TiZrSLActive materials demonstrated more pronounced effects on the biological responses of hBMSCs compared with TiSLA and TiZrSLA .
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Affiliation(s)
- Lihua Yin
- Department of Implant Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai JiaoTong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yaoren Chang
- Department of Implantology, School/Hospital of Stomatology Lanzhou University, Lanzhou, Gansu, China
| | - Yuanhe You
- Department of Implantology, School/Hospital of Stomatology Lanzhou University, Lanzhou, Gansu, China
| | - Chun Liu
- Department of Implantology, School/Hospital of Stomatology Lanzhou University, Lanzhou, Gansu, China
| | - Jie Li
- Department of Implantology, School/Hospital of Stomatology Lanzhou University, Lanzhou, Gansu, China
| | - Hong-Chang Lai
- Department of Implant Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai JiaoTong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
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Pjetursson BE, Valente NA, Strasding M, Zwahlen M, Liu S, Sailer I. A systematic review of the survival and complication rates of zirconia-ceramic and metal-ceramic single crowns. Clin Oral Implants Res 2019; 29 Suppl 16:199-214. [PMID: 30328190 DOI: 10.1111/clr.13306] [Citation(s) in RCA: 147] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/07/2018] [Accepted: 03/14/2018] [Indexed: 12/26/2022]
Abstract
OBJECTIVES The aim of the present systematic review was to analyze the survival and complication rates of zirconia-based and metal-ceramic implant-supported single crowns (SCs). MATERIALS AND METHODS An electronic MEDLINE search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective cohort and retrospective case series on implant-supported SCs with a mean follow-up time of at least 3 years. Patients had to have been clinically examined at the follow-up visit. Assessment of the identified studies and data extraction was performed independently by two reviewers. Failure and complication rates were analyzed using robust Poisson's regression models to obtain summary estimates of 5-year proportions. RESULTS The search provided 5,263 titles and 455 abstracts, full-text analysis was performed for 240 articles, resulting in 35 included studies on implant-supported crowns. Meta-analysis revealed an estimated 5-year survival rate of 98.3% (95% CI: 96.8-99.1) for metal-ceramic implant supported SCs (n = 4,363) compared to 97.6% (95% CI: 94.3-99.0) for zirconia implant supported SCs (n = 912). About 86.7% (95% CI: 80.7-91.0) of the metal-ceramic SCs (n = 1,300) experienced no biological/technical complications over the entire observation period. The corresponding rate for zirconia SCs (n = 76) was 83.8% (95% CI: 61.6-93.8). The biologic outcomes of the two types of crowns were similar; yet, zirconia SCs exhibited less aesthetic complications than metal-ceramics. The 5-year incidence of chipping of the veneering ceramic was similar between the material groups (2.9% metal-ceramic, 2.8% zirconia-ceramic). Significantly (p = 0.001), more zirconia-ceramic implant SCs failed due to material fractures (2.1% vs. 0.2% metal-ceramic implant SCs). No studies on newer types of monolithic zirconia SCs fulfilled the simple inclusion criteria of 3 years follow-up time and clinical examination of the present systematic review. CONCLUSION Zirconia-ceramic implant-supported SCs are a valid treatment alternative to metal-ceramic SCs, with similar incidence of biological complications and less aesthetic problems. The amount of ceramic chipping was similar between the material groups; yet, significantly more zirconia crowns failed due to material fractures.
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Affiliation(s)
- Bjarni E Pjetursson
- Department of Reconstructive Dentistry, Faculty of Odontology, University of Iceland, Reykjavik, Iceland.,Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Nicola A Valente
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Marcel Zwahlen
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Shiming Liu
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland.,Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
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Sailer I, Strasding M, Valente NA, Zwahlen M, Liu S, Pjetursson BE. A systematic review of the survival and complication rates of zirconia-ceramic and metal-ceramic multiple-unit fixed dental prostheses. Clin Oral Implants Res 2019; 29 Suppl 16:184-198. [PMID: 30328185 DOI: 10.1111/clr.13277] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2018] [Indexed: 12/28/2022]
Abstract
OBJECTIVES The aim of the present review was to compare the outcomes, that is, survival and complication rates of zirconia-ceramic and/or monolithic zirconia implant-supported fixed dental prostheses (FDPs) with metal-ceramic FDPs. MATERIALS AND METHODS An electronic MEDLINE search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective cohort studies and retrospective case series on implant-supported FDPs with a mean follow-up of at least 3 years. Patients had to have been examined clinically at the follow-up visit. Assessment of the identified studies and data extraction was performed independently by two reviewers. Failure and complication rates were analyzed using robust Poisson regression models to obtain summary estimates of 5-year proportions. RESULTS The search provided 5,263 titles and 455 abstracts. Full-text analysis was performed for 240 articles resulting in 19 studies on implant FDPs that met the inclusion criteria. The studies reported on 932 metal-ceramic and 175 zirconia-ceramic FDPs. Meta-analysis revealed an estimated 5-year survival rate of 98.7% (95% CI: 96.8%-99.5%) for metal-ceramic implant-supported FDPs, and of 93.0% (95% CI: 90.6%-94.8%) for zirconia-ceramic implant-supported FDPs (p < 0.001). Thirteen studies including 781 metal-ceramic implant-supported FDPs estimated a 5-year rate of ceramic fractures and chippings to be 11.6% compared with a significantly higher (p < 0.001) complication rate for zirconia implant-supported FDPs of 50%, reported in a small study with 13 zirconia implant-supported FDPs. Significantly (p = 0.001) more, that is, 4.1%, of the zirconia-ceramic implant-supported FDPs were lost due to ceramic fractures compared to only 0.2% of the metal-ceramic implant-supported FDPs. Detailed analysis of factors like number of units of the FDPs or location in the jaws was not possible due to heterogeneity of reporting. No studies on monolithic zirconia implant-supported FDPs fulfilled the inclusion criteria of the present review. Furthermore, no conclusive results were found for the aesthetic outcomes of both FDP-types. CONCLUSION For implant-supported FDPs, conventionally veneered zirconia should not be considered as material selection of first priority, as pronounced risk for framework fractures and chipping of the zirconia veneering ceramic was observed. Monolithic zirconia may be an interesting alternative, but its clinical medium- to long-term outcomes have not been evaluated yet. Hence, metal ceramics seems to stay the golden standard for implant-supported multiple-unit FDPs.
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Affiliation(s)
- Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Nicola Alberto Valente
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Marcel Zwahlen
- Department of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Shiming Liu
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland.,Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Bjarni Elvar Pjetursson
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland.,Department of Reconstructive Dentistry, Faculty of Odontology, University of Iceland, Reykjavik, Iceland
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Storelli S, Del Fabbro M, Scanferla M, Palandrani G, Romeo E. Implant supported cantilevered fixed dental rehabilitations in partially edentulous patients: Systematic review of the literature. Part I. Clin Oral Implants Res 2019; 29 Suppl 18:253-274. [PMID: 30306681 DOI: 10.1111/clr.13311] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To investigate in which clinical situations a cantilever fixed implant supported restorations can be a treatment alternative and which complications are reported. MATERIALS AND METHODS Two operators screened the literature (MEDLINE, EMBASE) and performed a hand search on the main journals dealing with implantology and prosthetics until 31 December 2017. Only articles that considered cantilever implant fixed restorations with at least 10 patients and with a mean follow-up of at least 5 year were selected. The outcome variables were survival of implants and prosthesis, mechanical, technical and biological complications, marginal bone loss. The review was performed according to the PRISMA statements. Risk of bias assessment was evaluated. Failure and complication rates were analysed using random effect Poisson regression models to obtain summary estimate of 5- and 10-year survival and complication rates. RESULTS A total of nine papers were selected for partially edentulous patients and reported high survival rate of the prosthesis. The estimated survival rate for 5-10 years was calculated to be 98.4% for the implants and 99.2% for the rehabilitations. Mechanical, technical and biological complications were reported with a cumulative 5-10 years complication rate of 28.66% and 26.57% for the patients and for the prosthesis, respectively. Two papers for single implant supporting 2-unit cantilever were not sufficient to draw conclusions. CONCLUSIONS There is evidence that cantilever can be successful treatment in partially edentulous patients. In two adjacent edentulous sites, data are not yet sufficient.
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Affiliation(s)
- Stefano Storelli
- Department of Biomedical, Surgical and Dental Sciences, Clinica Odontoiatrica ASST Santi Paolo e Carlo, University of Milan, Milan, Italy
| | - Massimo Del Fabbro
- Department of Biomedical, Surgical and Dental Sciences, IRCCS Orthopedic Institute Galeazzi, University of Milan, Milan, Italy
| | - Massimo Scanferla
- Department of Biomedical, Surgical and Dental Sciences, Clinica Odontoiatrica ASST Santi Paolo e Carlo, University of Milan, Milan, Italy
| | - Giulia Palandrani
- Department of Biomedical, Surgical and Dental Sciences, Clinica Odontoiatrica ASST Santi Paolo e Carlo, University of Milan, Milan, Italy
| | - Eugenio Romeo
- Department of Biomedical, Surgical and Dental Sciences, Clinica Odontoiatrica ASST Santi Paolo e Carlo, University of Milan, Milan, Italy
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Al‐Shibani N, Al‐Aali KA, Al‐Hamdan RS, Alrabiah M, Basunbul G, Abduljabbar T. Comparison of clinical peri‐implant indices and crestal bone levels around narrow and regular diameter implants placed in diabetic and non‐diabetic patients: A 3‐year follow‐up study. Clin Implant Dent Relat Res 2019; 21:247-252. [DOI: 10.1111/cid.12712] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 11/29/2018] [Accepted: 12/05/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Nouf Al‐Shibani
- Department of Periodontics and Community DentistryKing Saud University Riyadh Saudi Arabia
| | - Khulud Abdulrahman Al‐Aali
- Department of ProsthodonticsCollege of Dentistry, Princess Nourah Bint Abdulrahman University Riyadh Saudi Arabia
| | - Rana Sulaiman Al‐Hamdan
- Department of Restorative Dental Science, Operative DivisionCollege of Dentistry, King Saud University Riyadh Saudi Arabia
| | - Mohammed Alrabiah
- Department of Prosthetic Dental ScienceCollege of Dentistry, King Saud University Riyadh Saudi Arabia
| | - Ghadeer Basunbul
- Oral and Maxillofacial Rehabilitation Department, Faculty of DentistryKing Abdul Aziz University Jeddah Saudi Arabia
| | - Tariq Abduljabbar
- Department of Prosthetic Dental ScienceCollege of Dentistry, King Saud University Riyadh Saudi Arabia
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25
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Schiegnitz E, Al‐Nawas B. Narrow‐diameter implants: A systematic review and meta‐analysis. Clin Oral Implants Res 2018; 29 Suppl 16:21-40. [DOI: 10.1111/clr.13272] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2018] [Indexed: 01/19/2023]
Affiliation(s)
- Eik Schiegnitz
- Department of Oral and Maxillofacial Surgery, Plastic Surgery University Medical Centre of the Johannes Gutenberg‐University Mainz Mainz Germany
| | - Bilal Al‐Nawas
- Department of Oral and Maxillofacial Surgery, Plastic Surgery University Medical Centre of the Johannes Gutenberg‐University Mainz Mainz Germany
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26
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Storelli S, Del Fabbro M, Scanferla M, Palandrani G, Romeo E. Implant-supported cantilevered fixed dental rehabilitations in fully edentulous patients: Systematic review of the literature. Part II. Clin Oral Implants Res 2018; 29 Suppl 18:275-294. [DOI: 10.1111/clr.13310] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Stefano Storelli
- Department of Biomedical; Surgical and Dental Sciences; Clinica Odontoiatrica ASST Santi Paolo e Carlo; University of Milan; Milan Italy
| | - Massimo Del Fabbro
- Department of Biomedical; Surgical and Dental Sciences; IRCCS Orthopedic Institute Galeazzi; University of Milan; Milan Italy
| | - Massimo Scanferla
- Department of Biomedical; Surgical and Dental Sciences; Clinica Odontoiatrica ASST Santi Paolo e Carlo; University of Milan; Milan Italy
| | - Giulia Palandrani
- Department of Biomedical; Surgical and Dental Sciences; Clinica Odontoiatrica ASST Santi Paolo e Carlo; University of Milan; Milan Italy
| | - Eugenio Romeo
- Department of Biomedical; Surgical and Dental Sciences; Clinica Odontoiatrica ASST Santi Paolo e Carlo; University of Milan; Milan Italy
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27
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Trbakovic A, Bongenhielm U, Thor A. A clinical and radiological long-term follow-up study of narrow diameter implants in the aesthetic area. Clin Implant Dent Relat Res 2018; 20:598-605. [DOI: 10.1111/cid.12627] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 04/14/2018] [Accepted: 04/17/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Amela Trbakovic
- Department of Surgical Sciences, Plastic & Oral and Maxillofacial Surgery; Uppsala University; Uppsala SE-751 85 Sweden
| | - Ulf Bongenhielm
- Uppsala & Västerås Käkkirurgiska Centrum, Vaksalagatan 8; Uppsala 753 20 Sweden
| | - Andreas Thor
- Department of Surgical Sciences, Plastic & Oral and Maxillofacial Surgery; Uppsala University; Uppsala SE-751 85 Sweden
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28
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Janev E, Janeva N, Peeva-Petreska M, Mitic K. Therapeutic Challenge in a Severely Atrophic Mandible. Open Access Maced J Med Sci 2018; 6:564-567. [PMID: 29610621 PMCID: PMC5874386 DOI: 10.3889/oamjms.2018.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 12/21/2017] [Accepted: 02/08/2018] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: After tooth loss, however, severely atrophic residual alveolar ridges are fairly common, especially in patients who have been edentulous for a long period. Anterior area of the mandible is areas where clinicians have greater anatomical limitations. Reduced alveolar bone height very often represents a contraindication to implant therapy, unless a procedure such as a ridge augmentation is performed. CASE REPORT: This study aims to present two separate cases in highly selected edentulous anterior mandibular sites, where one stage, mini implants were used to support total prostheses. Small diameter implants have been used for retention of complete removable mandibular overdentures. This is an excellent option for those who suffer from the inconvenience and embarrassment of loose lower dentures and are tired of having to use sticky pastes and creams to make their dentures stay in place. CONCLUSION: Small diameter implants, when used multiples may offer adequate support for a removable prosthesis and overcome this problem.
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Affiliation(s)
- Edvard Janev
- Faculty of Dentistry, Ss Cyril and Methodius University of Skopje, Skopje, Republic of Macedonia
| | - Nadica Janeva
- Department of Prosthodontics, Faculty of Dental Medicine, Ss. Cyril and Methodius University of Skopje, Skopje, Republic of Macedonia
| | - Marija Peeva-Petreska
- Department of Oral Surgery, Faculty of Dental Medicine, Ss. Cyril and Methodius University of Skopje, Skopje, Republic of Macedonia
| | - Kristina Mitic
- Department of Periodontology, Faculty of Dental Medicine, Ss. Cyril and Methodius University of Skopje, Skopje, Republic of Macedonia
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29
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Cinel S, Celik E, Sagirkaya E, Sahin O. Experimental evaluation of stress distribution with narrow diameter implants: A finite element analysis. J Prosthet Dent 2018. [DOI: 10.1016/j.prosdent.2017.04.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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30
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Badran Z, Struillou X, Strube N, Bourdin D, Dard M, Soueidan A, Hoornaert A. Clinical Performance of Narrow-Diameter Titanium-Zirconium Implants: A Systematic Review. IMPLANT DENT 2018; 26:316-323. [PMID: 28114266 DOI: 10.1097/id.0000000000000557] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE Implant-supported prosthetic rehabilitations are in constant augmentation in everyday dental practice. This is largely due to increasing demand from patients for fixed or implant-stabilized prosthesis, although they are frequently reticent to complex preimplant bone augmentation surgeries, whenever bone volume is lacking. Narrow-diameter implants (NDI; ≤3.5 mm) have been developed to offer relatively simple implant solutions in challenging bone-deficient sites. However, concerns regarding their mechanical properties have been raised. Special titanium-zirconium material (Ti-Zr), with superior mechanical resistance, compared with pure titanium alloys has been introduced into the market. The purpose of this systematic review was to determine the available data on clinical performance of Ti-Zr NDI. MATERIALS AND METHODS A literature search of all available clinical articles dealing with Ti-Zr NDI has been carried out. After including only prospective clinical trials, 14 papers were retrieved for thorough reviewing. CONCLUSION Short-term results from preliminary clinical reports are quite promising, although the number of published studies and the follow-up periods are still insufficient to determine the real benefit of this hybrid material compared with titanium, especially when using NDI.
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Affiliation(s)
- Zahi Badran
- *Clinical Instructor, Department of Oral Implantology, Faculty of Dental Surgery, University of Nantes, Nantes, France; Associate Professor, Department of Periodontology, Faculty of Dental surgery, (Inserm U791/UIC 11) CHU de Nantes, France. †Clinical Instructor, Department of Oral Implantology, Faculty of Dental Surgery, University of Nantes, Nantes, France. ‡Adjunct Assistant Professor, Department of Periodontology and Implant Dentistry, College of Dentistry, New York University, New York, NY, and Institut Straumann, Basel, Switzerland. §Professor and Head, Department of Periodontology, Faculty of Dental surgery, (Inserm U791/UIC 11) CHU de Nantes, Nantes, France. ¶Associate Professor and Head, Department of Oral Implantology, Faculty of Dental Surgery, University of Nantes, Nantes, France
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Chiapasco M, Casentini P. Horizontal bone-augmentation procedures in implant dentistry: prosthetically guided regeneration. Periodontol 2000 2018; 77:213-240. [DOI: 10.1111/prd.12219] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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32
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Penmetsa R, Venkatesh Murthy KR. Replacement of a molar with two narrow-diameter dental implants. J Indian Soc Periodontol 2017; 20:651-654. [PMID: 29238150 PMCID: PMC5713093 DOI: 10.4103/jisp.jisp_134_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Dental implants have demonstrated a high degree of success in the restorations of teeth in partially or completely edentulous patients. However, when the buccolingual width of the edentulous crest is insufficient for the placement of standard sized implants, the use of two or more smaller diameter implants should be considered to avoid the need for invasive reconstruction techniques such as grafting procedures. The present case report describes the replacement of a single mandibular first molar with two narrow-diameter implants, in a 41-year- old male patient. No postoperative complications were reported in the 3-year follow-up period. The placement of two narrow-diameter implants replacing a missing mandibular molar could eliminate the mesiodistal bending, double the support capacity in the buccolingual direction, and minimize stress on the implants.
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Affiliation(s)
- Rajeshwari Penmetsa
- Department of Periodontics, GITAM Dental College and Hospital, Visakhapatnam, Andhra Pradesh, India
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de Souza AB, Sukekava F, Tolentino L, César-Neto JB, Garcez-Filho J, Araújo MG. Narrow- and regular-diameter implants in the posterior region of the jaws to support single crowns: A 3-year split-mouth randomized clinical trial. Clin Oral Implants Res 2017; 29:100-107. [DOI: 10.1111/clr.13076] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2017] [Indexed: 12/20/2022]
Affiliation(s)
| | - Flávia Sukekava
- Division of Periodontics; School of Dentistry; University of São Paulo; São Paulo Brazil
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Iegami CM, Uehara PN, Sesma N, Pannuti CM, Tortamano Neto P, Mukai MK. Survival rate of titanium-zirconium narrow diameter dental implants versus commercially pure titanium narrow diameter dental implants: A systematic review. Clin Implant Dent Relat Res 2017; 19:1015-1022. [DOI: 10.1111/cid.12527] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/26/2017] [Accepted: 07/31/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Carolina Mayumi Iegami
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
| | | | - Newton Sesma
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
| | | | - Pedro Tortamano Neto
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
| | - Márcio Katsuyoshi Mukai
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
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Galindo-Moreno P, Nilsson P, King P, Worsaae N, Schramm A, Padial-Molina M, Maiorana C. Clinical and radiographic evaluation of early loaded narrow-diameter implants: 5-year follow-up of a multicenter prospective clinical study. Clin Oral Implants Res 2017. [DOI: 10.1111/clr.13029] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Pablo Galindo-Moreno
- Department of Oral Surgery and Implant Dentistry; School of Dentistry; University of Granada; Granada Spain
| | - Peter Nilsson
- Department of Oral & Maxillofacial Surgery; The Institute for Postgraduate Education; Jönköping Sweden
| | - Paul King
- Restorative Dentistry; University of Bristol Dental School; Bristol UK
| | - Nils Worsaae
- Department of Oral & Maxillofacial Surgery; University Hospital (Rigshospitalet); Copenhagen Denmark
| | - Alexander Schramm
- Department of Oral and Maxillofacial Surgery; University Hospital Ulm and Department of Oral and Plastic Maxillofacial Surgery; German Federal Armed Forces Hospital; Ulm Germany
| | - Miguel Padial-Molina
- Department of Oral Surgery and Implant Dentistry; School of Dentistry; University of Granada; Granada Spain
| | - Carlo Maiorana
- Oral Surgery and Implantology Fondazione IRCSS Ca’ Granda Ospedale Maggiore Policlinico Milano; University of Milan; Milan Italy
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Fracture Resistance of Internal Conical and External Hexagon: Regular and Narrow Implant-Abutment Assemblies. IMPLANT DENT 2017; 25:510-4. [PMID: 27280738 DOI: 10.1097/id.0000000000000446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE The aim of this study was to compare the maximum load on the elastic limit of internal conical (IC) implants with regular external hexagon (REH) and narrow external hexagon (NEH) implants. MATERIALS AND METHODS Thirty cylindrical implants were divided in 3 groups (n = 10): REH (3.75 mm); NEH (3.3 mm); IC (3.5 mm). The implants were evaluated by means of cantilever bending loads using a mechanical testing machine. A strain qualitative analysis and the corresponding angles were analyzed. Using single factor analysis of variance with Tukey Test and Friedman Test (P < 0.05) the statistical analysis for data were performed. RESULTS REH (294.37 N) and IC (294.37 N) groups presented statistically greater Fle than NEH (189.16 N). Regarding to the strain, there were no significant differences among groups. However, there were a greater number of fissures and more fractures present on NEH group. CONCLUSION The IC implant with smaller diameter did not result in reduction of elastic limit when compared with the REH implants. Nevertheless, the reduction of 0.45 mm of the hexagonal connection implant's diameter has significantly diminished the elastic limit.
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Chang YY, Kim SH, Park KO, Yun JH. Effect of microthreads on coronal bone healing of narrow-diameter implants with reverse-tapered design in beagle dogs. Clin Oral Implants Res 2017; 28:1532-1542. [PMID: 28543806 DOI: 10.1111/clr.13022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2017] [Indexed: 12/01/2022]
Abstract
OBJECTIVES The objective of this study was to investigate the effect of microthreads on the coronal bone healing of narrow-diameter implants with reverse-tapered design. MATERIAL AND METHODS A total of 52 implants were classified into two groups according to presence or absence of coronal microthreads, the reverse-tapered narrow-diameter implant (RTN) group, and the reverse-tapered narrow-diameter implant with microthreads (RTNM) group. The implants were installed in split-mouth design in the edentulous mandible of six dogs. Three animals were sacrificed at 4 weeks and three at 8 weeks. Resonance frequency analysis, bone measurement using microcomputed tomography (micro-CT), removal torque test, and histometric analysis were performed. RESULTS No significant differences in implant stability quotient value were observed between the groups at baseline, 4 weeks, or 8 weeks. Bone measurement using micro-CT showed that bone-implant contact volume (BICV) and bone-implant contact volume ratio (BICVR) in the coronal part of RTNM were statistically higher than those in RTN at 4 and 8 weeks. Histometric analysis showed statistically higher bone-implant contact length (BICL) in the coronal part of RTNM than in RTN at 4 weeks; however, bone-implant contact ratio (BICR) was not significantly different between the groups. At 8 weeks, the BICL and BICR did not differ significantly between the groups. Removal torque test showed no significant differences between the groups at 4 and 8 weeks. CONCLUSIONS The microthreads might facilitate more coronal bone-implant contact due to increased surface areas at an early healing phase; however, they did not significantly affect coronal bone healing at 8 weeks.
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Affiliation(s)
- Yun-Young Chang
- Division of Periodontology, Department of Dentistry, Inha International Medical Center, Incheon, Korea
| | - Su-Hwan Kim
- Department of Periodontics, Asan Medical Center & Department of Dentistry, University of Ulsan College of Medicine, Seoul, Korea
| | - Keun-Oh Park
- Department of Bio-fibers and Materials Science, Kyungpook National University, Daegu, Korea
| | - Jeong-Ho Yun
- Department of Periodontology, School of Dentistry and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Korea.,Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
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Pieri F, Forlivesi C, Caselli E, Corinaldesi G. Narrow- (3.0 mm) Versus Standard-Diameter (4.0 and 4.5 mm) Implants for Splinted Partial Fixed Restoration of Posterior Mandibular and Maxillary Jaws: A 5-Year Retrospective Cohort Study. J Periodontol 2017; 88:338-347. [DOI: 10.1902/jop.2016.160510] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abstract
STATEMENT OF PROBLEM Evidence is limited on the efficacy of narrow-diameter implants (NDIs) in the posterior jaw. PURPOSE The purpose of this systematic review was to assess the survival of NDIs and provide guidelines for their safe use. MATERIALS AND METHODS Electronic search of the English-language literature enriched by hand search to identify suitable publications was made. Only peer-reviewed clinical studies published from January 1990 through March 2014 were included. RESULTS Seventeen studies with a total of 1644 implants met the inclusion criteria, with an observation period from 1 up to 12 years. The mean survival rate of 98.6% was reported. Technical and other complications were observed. CONCLUSION Short-term clinical data suggest that NDIs may serve in the posterior jaw as an alternative to standard-diameter implants. However, certain clinical conditions must be observed to assure long-term success.
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Temizel S, Heinemann F, Dirk C, Bourauel C, Hasan I. Clinical and radiological investigations of mandibular overdentures supported by conventional or mini-dental implants: A 2-year prospective follow-up study. J Prosthet Dent 2016; 117:239-246.e2. [PMID: 27671375 DOI: 10.1016/j.prosdent.2016.07.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 06/30/2016] [Accepted: 07/01/2016] [Indexed: 11/20/2022]
Abstract
STATEMENT OF PROBLEM Conventional dental implants are not applicable in the mandibular interforaminal region if bone volume is limited. Mini-dental implants offer an alternative means of supporting mandibular overdentures in a narrow residual ridge, without additional surgery. PURPOSE The purpose of this nonrandomized clinical trial was to compare the ability of mini-dental implants with that of conventional dental implants in supporting mandibular overdentures during a 2-year clinical follow-up. Bone quality, bone resorption, implant stability, and oral health were assessed radiographically. MATERIAL AND METHODS A total of 32 participants with edentulism were included. Twenty-two participants (99 implants) received 4 to 5 mini-dental implants (diameter: 1.8-2.4 mm; length: 13-15 mm, study group), and 10 participants (35 implants) received 2 to 4 conventional dental implants (diameter: 3.3-3.7 mm; length: 11-13 mm, control group). The selection of the participants in the study or control group was based on the available bone volume in the mandible. The selection was not randomized. The density of cortical bone thickness was measured in Hounsfield units (HU) from computed tomography data, and patients were followed for 2 years. The participants were examined 3, 6, 12, and 24 months after surgery. Primary stability immediately after the insertion of dental implants (Periotest), secondary stability 6 months after implantation, modified plaque, bleeding on probing indices, and probing depth were measured and analyzed statistically (α=.05). RESULTS The mean HU value 6 months after implantation in the participants who received mini-dental implants was significantly (P=.035) higher (1250 HU) than that in the participants who received conventional dental implants (1100 HU). The probing depths around the conventional dental implants (1.6 and 1.8 mm, respectively) were significantly higher than those around the mini-dental implants (1.3 and 1.2 mm, respectively) 12 and 24 months after surgery, respectively (P<.001). The mean primary and secondary stability values for conventional dental implants were -4.0 and -4.9, respectively. The primary and secondary stability values for the mini-dental implants were -0.3 and -1.4, respectively. The Periotest values of the primary (measured immediately after implant insertion) and secondary implant stabilities (measured 6 months after implant insertion) were significantly higher for the conventional dental implants than for the mini-dental implants (P<.001). CONCLUSIONS Based on this 2-year clinical trial, patients receiving mini-dental implants had clinical outcomes similar to those of patients receiving conventional dental implants to support overdenture prostheses.
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Affiliation(s)
- Sonay Temizel
- Dental student, Endowed Chair of Oral Technology, Rheinische Friedrich-Wilhelms University, Bonn, Germany
| | - Friedhelm Heinemann
- Research Associate Professor, Department of Prosthodontics, Gerodontology and Biomaterials, University of Greifswald, Greifswald, Germany
| | - Cornelius Dirk
- Doctoral student, Endowed Chair of Oral Technology, Rheinische Friedrich-Wilhelms University, Bonn, Germany
| | - Christoph Bourauel
- Professor, Endowed Chair of Oral Technology, Rheinische Friedrich-Wilhelms University, Bonn, Germany
| | - Istabrak Hasan
- Senior researcher, Department of Prosthetic Dentistry, Preclinical Education and Materials Science, Dental School, Rheinische Friedrich-Wilhelms University, Bonn, Germany.
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Herrmann J, Hentschel A, Glauche I, Vollmer A, Schlegel KA, Lutz R. Implant survival and patient satisfaction of reduced diameter implants made from a titanium-zirconium alloy: A retrospective cohort study with 550 implants in 311 patients. J Craniomaxillofac Surg 2016; 44:1940-1944. [PMID: 27765553 DOI: 10.1016/j.jcms.2016.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 08/11/2016] [Accepted: 09/19/2016] [Indexed: 11/29/2022] Open
Abstract
The aim of the study was to evaluate implant survival of reduced-diameter implants compared to regular-diameter implants. A retrospective evaluation of 154 Straumann Bone Level Roxolid® implants (diameter 3.3 mm) with SLActive®-surface in 107 patients, which were inserted between 2009 and 2010 in private practice, was performed. The mean observation period was 22.4 ± 8.2 months. 396 Straumann SLActive® implants (4.1 mm and 4.8 mm) in 204 patients, with an observation period of 28.4 ± 10.1 months served as control group. Implant survival rate, resonance frequency analysis and patient satisfaction were evaluated. The implant survival rate was 97.4% in the test vs. 98.5% in the control group. Resonance frequency analysis showed statistically significant lower values for the reduced-diameter implants. Patient satisfaction showed no significant difference between the test and the control group. Reduced-diameter implants displayed high survival rates during the period investigated and represent a convincing treatment alternative. Long-term follow-up investigations confirmed the high implant survival rates of 96.8% (after 69.7 ± 12.3 months) in the test group and 98.5% (after 76.0 ± 13.6 months) in the control group.
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Affiliation(s)
- Jan Herrmann
- Private Practice, Lothar-Streit-Straße 10b, 08056 Zwickau, Germany; Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany
| | - Andreas Hentschel
- Private Practice, Lothar-Streit-Straße 10b, 08056 Zwickau, Germany; Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany
| | - Ingmar Glauche
- Institute for Medical Informatics and Biometry (IMB) (Director of the Institution: Prof. Dr. rer. med. Ingo Röder), Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | | | - Karl Andreas Schlegel
- Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany
| | - Rainer Lutz
- Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany.
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Charles PD, Anandapandian PA, Samuel S. Osteogenic potential of laser modified and conditioned titanium zirconium surfaces. J Indian Prosthodont Soc 2016; 16:253-8. [PMID: 27621544 PMCID: PMC5000562 DOI: 10.4103/0972-4052.186403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Statement of Problem: The osseointegration of dental implant is related to their composition and surface treatment. Titanium zirconium (TiZr) has been introduced as an alternative to the commercially pure titanium and its alloys as dental implant material, which is attributed to its superior mechanical and biological properties. Surface treatments of TiZr have been introduced to enhance their osseointegration ability; however, reliable, easy to use surface modification technique has not been established. Purpose: The purpose of this study was to evaluate and compare the effect of neodymium-doped yttrium aluminum garnet (Nd-YAG) laser surface treatment of TiZr implant alloy on their osteogenic potential. Materials and Methods: Twenty disc-shaped samples of 5 mm diameter and 2 mm height were milled from the TiZr alloy ingot. The polished discs were ultrasonically cleaned in distilled water. Ten samples each were randomly selected as Group A control samples and Group B consisted of Nd-YAG laser surface etched and conditioned test samples. These were evaluated for cellular response. Cellular adhesion and proliferation were quantified, and the results were statistically analyzed using nonparametric analysis. Cellular morphology was observed using electron and epiflurosence microscopy. Results: Nd-YAG laser surface modified and conditioned TiZr samples increased the osteogenic potential. Conclusion: Nd-YAG laser surface modification of TiZr, improves the cellular activity, surface roughness, and wettability, thereby increasing the osteogenic potential.
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Affiliation(s)
- P David Charles
- Department of Prosthodontics, SRM Dental College, Chennai, Tamil Nadu, India
| | | | - Shila Samuel
- Department of Biochemistry, VRR Institute of Biomedical Science, Chennai, Tamil Nadu, India
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Wu AYJ, Hsu JT, Chee W, Lin YT, Fuh LJ, Huang HL. Biomechanical evaluation of one-piece and two-piece small-diameter dental implants: In-vitro experimental and three-dimensional finite element analyses. J Formos Med Assoc 2016; 115:794-800. [DOI: 10.1016/j.jfma.2016.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 10/22/2022] Open
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Galli S, Jimbo R, Naito Y, Berner S, Dard M, Wennerberg A. Chemically modified titanium-zirconium implants in comparison with commercially pure titanium controls stimulate the early molecular pathways of bone healing. Clin Oral Implants Res 2016; 28:1234-1240. [DOI: 10.1111/clr.12947] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Silvia Galli
- Department of Prosthodontics; Faculty of Odontology; Malmö University; Malmö Sweden
| | - Ryo Jimbo
- Department of Prosthodontics; Faculty of Odontology; Malmö University; Malmö Sweden
- Department of Oral and Maxillofacial Surgery and Oral Medicine; Faculty of Odontology; Malmö University; Malmö Sweden
| | - Yoshihito Naito
- Oral Implant Center; Tokushima University Hospital; Tokushima Japan
| | | | - Michel Dard
- Institut Straumann AG; Basel Switzerland
- College of Dentistry; New York University; New York NY USA
| | - Ann Wennerberg
- Department of Prosthodontics; Faculty of Odontology; Malmö University; Malmö Sweden
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Altuna P, Lucas-Taulé E, Gargallo-Albiol J, Figueras-Álvarez O, Hernández-Alfaro F, Nart J. Clinical evidence on titanium–zirconium dental implants: a systematic review and meta-analysis. Int J Oral Maxillofac Surg 2016; 45:842-50. [DOI: 10.1016/j.ijom.2016.01.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 10/21/2015] [Accepted: 01/11/2016] [Indexed: 11/15/2022]
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Moráguez O, Vailati F, Grütter L, Sailer I, Belser UC. Four-unit fixed dental prostheses replacing the maxillary incisors supported by two narrow-diameter implants - a five-year case series. Clin Oral Implants Res 2016; 28:887-892. [PMID: 27325154 DOI: 10.1111/clr.12895] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES (1) To determine the survival rate of 10 four-unit fixed dental prostheses (FDPs) replacing the four maxillary incisors, supported by 20 narrow-diameter implants (NDIs), (2) to assess the incidence of mechanical and biological complications, and (3) to evaluate bone level changes longitudinally after final FDP insertion. MATERIALS AND METHODS Ten patients (six women, four men), mean age 49.4 ± 12.6 years, were treated with a four-unit anterior maxillary FDP (six screw-retained; four cemented). Biological parameters, eventual technical complications, radiographic measurements, and study casts were assessed at 1 (baseline), 3, and 5 years after implant placement. A multilevel logistic regression test was performed on clinical parameters and bone level changes (significance level P < 0.05). RESULTS The 5-year implant and FDP survival rate was 100%. Mean modified plaque index (mPI) values were 0.03 and 0.02 at 3 and 5 years, significantly lower when compared to mPI (0.11 ± 0.31) at 1 year. Mean modified sulcus bleeding index (mSBI) was 0.08, 0.08, and 0.15 over time. Probing depth (PD) values were 1.57, 1.64, and 2.03 mm. Statistically significant differences were found between 1 vs. 5 year (P = 0.0003) and 3 vs. 5 year (P = 0.001). Keratinized mucosa (3.65 mm) remained stable during observation period. DIB mean values were 2.01 ± 0.34, 2.13 ± 0.13, and 2.17 ± 0.38 mm. Patient satisfaction based on visual analog scale revealed favorable fulfillment of overall treatment and esthetic expectations. CONCLUSIONS Two NDIs supporting a four-unit FDP to replace the four missing maxillary incisors may be considered a predictable treatment modality.
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Affiliation(s)
- Osvaldo Moráguez
- Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Francesca Vailati
- Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Linda Grütter
- Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Urs C Belser
- Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
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Lotz EM, Olivares-Navarrete R, Hyzy SL, Berner S, Schwartz Z, Boyan BD. Comparable responses of osteoblast lineage cells to microstructured hydrophilic titanium-zirconium and microstructured hydrophilic titanium. Clin Oral Implants Res 2016; 28:e51-e59. [DOI: 10.1111/clr.12855] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/03/2016] [Indexed: 01/15/2023]
Affiliation(s)
- Ethan M. Lotz
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
| | - Rene Olivares-Navarrete
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
| | - Sharon L. Hyzy
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
| | | | - Zvi Schwartz
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
- Department of Periodontics; University of Texas Health Science Center at San Antonio; San Antonio TX USA
| | - Barbara D. Boyan
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
- Wallace H. Coulter Department of Biomedical Engineering; Georgia Institute of Technology; Atlanta GA USA
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Galindo-Moreno P, Padial-Molina M, Nilsson P, King P, Worsaae N, Schramm A, Maiorana C. The influence of the distance between narrow implants and the adjacent teeth on marginal bone levels. Clin Oral Implants Res 2016; 28:704-712. [DOI: 10.1111/clr.12867] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Pablo Galindo-Moreno
- Oral Surgery and Implant Dentistry Department; School of Dentistry; University of Granada; Granada Spain
| | - Miguel Padial-Molina
- Oral Surgery and Implant Dentistry Department; School of Dentistry; University of Granada; Granada Spain
| | - Peter Nilsson
- Department of Oral & Maxillofacial Surgery; The Institute for Postgraduate Education; Jönköping Sweden
| | - Paul King
- Restorative Dentistry; University of Bristol Dental School; Bristol UK
| | - Nils Worsaae
- Department of Oral & Maxillofacial Surgery; University Hospital (Rigshospitalet); Copenhagen Denmark
| | - Alexander Schramm
- Department of Oral and Maxillofacial Surgery; University Hospital Ulm and Department of Oral and Plastic Maxillofacial Surgery; German Federal Armed Forces Hospital; Ulm Germany
| | - Carlo Maiorana
- Chairman Oral Surgery and Implantology Fondazione IRCSS Ca’ Granda Ospedale Maggiore Policlinico Milano; University of Milan; Milan Italy
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Borie E, Orsi IA, de Araujo CPR. The influence of the connection, length and diameter of an implant on bone biomechanics. Acta Odontol Scand 2015; 73:321-9. [PMID: 25598357 DOI: 10.3109/00016357.2014.961957] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Regardless of the multiple options of connections, diameters and heights for dental implants, the clinician should know the biomechanical behavior of the bone to plan the treatment according to the biological and anatomical conditions of each patient, without risk to the long-term treatment success. REVIEW The following review attempts to summarize the relevant literature to establish guidelines for clinicians based on the scientific evidence regarding the influence by the implant's connection, diameter and length on the bone biomechanics. CONCLUSIONS The length, diameter and connection of each implant have a degree of influence in bone biomechanics. Despite the influence of different implant connections, diameters and lengths on peri-implant bone stress and strain, these characteristics should remain within the physiological limits to avoid a pathological overload, bone resorption and consequent risk to the long-term success of implant-prosthetic treatment.
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Affiliation(s)
- Eduardo Borie
- CIMOFIR Research Centre, Dental School, Universidad de La Frontera , Temuco , Chile
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50
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Zhang W, Skrypczak A, Weltman R. Anterior maxilla alveolar ridge dimension and morphology measurement by cone beam computerized tomography (CBCT) for immediate implant treatment planning. BMC Oral Health 2015; 15:65. [PMID: 26059796 PMCID: PMC4460662 DOI: 10.1186/s12903-015-0055-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 06/03/2015] [Indexed: 01/07/2023] Open
Abstract
Background Implants have been widely used to restore missing teeth. Limited information on applied anatomy at the anterior maxilla compromises the clinical outcome for implant placement in this region. In the current study, Cone Beam Computerized Tomography (CBCT) was used to measure alveolar ridge and buccal undercut dimension at the anterior maxilla to help develop treatment planning for immediate implant placement. Methods CBCT scans were screened to include 51 subjects with full dentition at right maxilla. Measurements were taken at the cross sectional views in the middle of the maxillary right central incisor, lateral incisor, and canine regions. Alveolar height was measured from the alveolar crest to floor of nasal fossa. Alveolar width was measured from the buccal to palatal cortical plate at the coronal, middle, and apical third of the distance from the alveolar crest to floor of the nasal fossa. Buccal undercut location was measured from where the buccal cortical plate started dipping to a line extending at the alveolar crest that was perpendicular to the long axis of the alveolar ridge. The buccal undercut depth was measured from the deepest point of the undercut at the buccal plate to a line tangent to the buccal plate paralleling the long axis of ridge. Results Alveolar width increased from coronal to apical direction for each tooth. Mean alveolar widths (mm) were: central incisor, 9.55; lateral incisor, 8.30; canine, 9.62. The lateral incisor had a significantly smaller alveolar width than the other anterior teeth. No significant difference in ridge height was noted among the teeth. Undercut locations from the alveolar crest (mm) were: central incisor, 5.84; lateral incisor, 3.59; canine, 5.11. Undercut depths (mm) were: central incisor, 0.76; lateral incisor, 0.87; canine, 0.73. The percentages of teeth with buccal undercuts were: central incisor, 41 %, lateral incisor, 77 %, and canine 33 %. Male demonstrate significant larger ridge width compared with females for all three teeth. Conclusions At anterior maxilla, the lateral incisor has the thinnest alveolar bone, and most frequently exhibits a buccal undercut which is the closest to alveolar ridge compared with other maxillary anterior teeth.
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Affiliation(s)
- Wenjian Zhang
- Department of Diagnostic and Biomedical Sciences, The University of Texas School of Dentistry at Houston, 7500 Cambridge Street, Houston, TX, 77054, USA.
| | - Adam Skrypczak
- Junior Dental Student, The University of Texas School of Dentistry at Houston, 7500 Cambridge Street, Houston, TX, 77054, USA.
| | - Robin Weltman
- Department of Periodontics and Dental Hygiene, The University of Texas School of Dentistry at Houston, 7500 Cambridge Street, Houston, TX, 77054, USA.
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