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Al Jabbari YS, Fournelle R, Sufyan A, Zinelis S. Is fatigue mechanism implicated in intraoral fracture of narrow dental implants? A thorough retrieval analysis of two failed implant fixtures retrieved from a single patient. Saudi Dent J 2024; 36:770-777. [PMID: 38766294 PMCID: PMC11096602 DOI: 10.1016/j.sdentj.2024.02.006] [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: 09/01/2023] [Revised: 02/12/2024] [Accepted: 02/14/2024] [Indexed: 05/22/2024] Open
Abstract
Purpose This study aimed to perform a thorough failure analysis of two fractured narrow dental implants after medium-term in vivo use. Materials and methods The top parts of two fractured Narrow Dental Implant (NDI) fixtures were retrieved from two different locations at two different times from the same patient. The NDI-specimen-1 was 12-months in service while the NDI-specimen-2 was 17-months in service. In both cases, the top parts of the fractured NDI fixtures that were attached to prosthetic components were retrieved and subjected to thorough, non-destructive and destructive testing. Results Light Microscopy (LM) and Scanning Electron Microscopy (SEM) revealed that both the retrieved fractured NDIs failed because of fatigue, characterized by beach and ratchet marks. Macroscopic examination revealed that fatigue cracks initiated at the internal thread surfaces of the implants and propagated around them until final fracture. Both samples fractured near the end of the retaining screw and followed the root of the internal thread. Optical and SEM analyses revealed a uniform distribution of irregularly shaped grains (diameter = 2 to 5 μm). X -ray Energy Dispersive Spectroscopy (EDS) analysis showed that the NDI-specimen-1 was made using Ti-14%Zr with a Vickers Hardens (HV) of 288 ± 5. Conclusion Since the fracture occurred by a fatigue; thus, an increase in fatigue resistance will be beneficial for the longevity of NDI.
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Affiliation(s)
- Youssef S. Al Jabbari
- Dental Biomaterials Research and Development Chair, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
- Department of Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Raymond Fournelle
- Professor Emeritus, Department of Mechanical and Industrial Engineering, Marquette University School of Engineering, Milwaukee, WI, United States
| | - Arif Sufyan
- Dental Biomaterials Research and Development Chair, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Spiros Zinelis
- Dental Biomaterials Research and Development Chair, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
- Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
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2
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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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Zhang Y, Wen G, Dong W. Clinical outcomes of narrow- and regular-diameter implants with bone augmentation in the anterior maxilla: a systematic review and meta-analysis. Clin Oral Investig 2024; 28:196. [PMID: 38443497 DOI: 10.1007/s00784-024-05588-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 02/25/2024] [Indexed: 03/07/2024]
Abstract
OBJECTIVES To evaluate the clinical outcomes of narrow-diameter implants (NDIs) and regular-diameter implants (RDIs) with bone augmentation in the anterior maxilla, with implant survival rate (ISR) as the primary outcome. Additionally, secondary outcomes such as peri-implant marginal bone loss (MBL), pocket probing depth (PPD), mechanical complications, and biological complications were also considered. MATERIALS AND METHODS A thorough literature search was performed to identify randomized controlled trials and cohort studies comparing outcomes of NDIs and RDIs with bone augmentation in the anterior maxilla published up to February 2024. Only studies with a minimum follow-up period of 12 months were selected for analysis. Meta-analysis was performed if at least two articles with similar characteristics were available. RESULTS Of the 288 articles initially considered, 5 were included in the analysis, involving 282 NDIs and 100 RDIs. At the 36-month follow-up, no statistically significant differences in ISR, which ranged 93.8-100% for NDIs and were 100% for RDIs, were observed between the two groups (relative risk, 0.989; 95% confidence interval, 0.839-1.165; p = 0.896). Similarly, MBL and PPD did not differ significantly between the two groups. Soft tissue dehiscence was the most common complication found in RDIs. CONCLUSION The results indicate that NDIs yield clinical outcomes similar to those of RDIs with bone augmentation in the anterior maxilla over a 36-month follow-up period. CLINICAL RELEVANCE Considering the similar clinical outcomes, the shortened treatment duration and more rapid esthetic improvement associated with NDIs may render them preferrable to RDIs with bone augmentation, particularly in this esthetic zone.
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Affiliation(s)
- Yan Zhang
- School of Stomatology, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Guochen Wen
- School of Stomatology, North China University of Science and Technology, Tangshan, Hebei, 063210, China
| | - Wei Dong
- School of Stomatology, North China University of Science and Technology, Tangshan, Hebei, 063210, China.
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Zumstein K, Waller T, Hämmerle CHF, Jung RE, Benic G, Mühlemann S. Clinical performance of monolithic zirconia crowns on titanium-zirconium reduced-diameter implants in the molar area: Interim data at three years of a randomized controlled trial. Clin Oral Implants Res 2023; 34:1354-1362. [PMID: 37668109 DOI: 10.1111/clr.14179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 08/10/2023] [Accepted: 08/23/2023] [Indexed: 09/06/2023]
Abstract
AIM The aim of the present study was (i) to evaluate the clinical performance of reduced-diameter implants placed in the molar area and (ii) to test whether monolithic zirconia implant-supported crowns lead to similar clinical outcomes compared to porcelain-fused-to-metal crowns. MATERIALS AND METHODS A total of 76 patients needing a single implant crown in the posterior region were recruited. All patients received a titanium-zirconium reduced-diameter implant (Straumann Roxolid, Tissue Level, Standard Plus, diameter 3.3 mm, regular neck) randomly allocated to receive either a (1) monolithic zirconia crown (test) or (2) porcelain-fused-to-metal crown (control). Implant survival, prosthetic outcomes, and patient-reported outcomes were assessed at crown delivery and after 3 years of follow-up. Marginal bone levels (MBL) as well as clinical parameters including probing depth (PD), bleeding on probing (BOP), and plaque levels (PCR) were also recorded. RESULTS A total of 59 patients were available at the 3-year follow-up; 32 patients with a monolithic zirconia crown (TEST) and 27 patients with a porcelain-fused-to-metal crown (CONTROL). 14 implants (11 implant fractures/3 aseptic losses) were lost leading to an estimated implant survival rate of 80% ± 5.1% (95% CI 70.8%-90.8%). Prosthetic complications were limited to the control group and involved minor chippings. CONCLUSIONS This type of reduced-diameter implant to support single implant molar crowns in the molar area cannot be recommended. Monolithic zirconia crowns appear to be a viable option in the posterior region showing similar prosthetic outcomes to porcelain-fused-to-metal crowns.
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Affiliation(s)
- K Zumstein
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - T Waller
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - C H F Hämmerle
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - R E Jung
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - G Benic
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - S Mühlemann
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
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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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Verma A, Agrawal KK, Chand P, Ramashanker, Tripathi S, Arya D. Clinical Outcomes of Titanium Zirconium and Titanium Dental Implants under Immediate Functional Loading in Posterior Mandibular Region. Indian J Dent Res 2023; 34:365-370. [PMID: 38739813 DOI: 10.4103/ijdr.ijdr_313_23] [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: 04/10/2023] [Accepted: 09/08/2023] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Studies comparing the clinical performance of titanium zirconium (Ti-Zr) and titanium (Ti) dental implants subjected to immediate loading in the posterior mandibular region where occlusal forces are higher are sparse in the current literature. Hence, the study aimed to evaluate and compare the clinical outcomes of Ti-Zr and Ti dental implants under immediate functional loading in the mandibular posterior region. METHODS Forty participants fulfilling the predetermined selection criteria were randomly grouped based on dental implant used; Titanium zirconium (Ti-Zr):20, and Titanium (Ti):20. Dental implants were placed through a standard full-thickness mucoperiosteal flap approach and loaded immediately fulfilling the principle of implant protective occlusion. Clinical parameters including crestal bone loss (CBL), modified plaque index (MPI), probing depth (PD) and modified sulcular bleeding index (MSBI) were measured at baseline and follow-up visits (4, 8, and 12 months). Obtained data were compared with standard tests such as the t-test, Chi-square test, and Mann-Whitney U test. RESULTS On intergroup comparison, CBL was more in the Ti-Zr group as compared to the Ti group at 4 months (0.72 ± 0.16 mm versus 0.70 ± 0.13 mm), but it was less at 8 months (1.08 ± 0.16 mm versus 1.13 ± 0.13 mm) and 12 months (1.19 ± 0.17 mm versus 1.24 ± 0.12 mm) but the difference was not statistically significant (P > 0.05). Mann-Whitney test also revealed no statistically significant difference in MPI, PD and MSBI at 4 months, 8 months and 12 months recall (P > 0.05). CONCLUSIONS CBL and periodontal parameters of Ti-Zr dental implants were found similar to Ti dental implants under immediate loading in the posterior mandibular region. However, further studies are needed to determine its long-term efficacy and cost-effectiveness.
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Affiliation(s)
- Aditi Verma
- Department of Prosthodontics, King George's Medical University, Lucknow, Uttar Pradesh, India
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7
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M King E, Schofield J. Restoratively driven planning for implants in the posterior maxilla - Part 1: alveolar bone healing, bone assessment and clinical classifications. Br Dent J 2023; 235:585-592. [PMID: 37891288 PMCID: PMC10611561 DOI: 10.1038/s41415-023-6391-7] [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: 03/19/2023] [Revised: 07/26/2023] [Accepted: 08/07/2023] [Indexed: 10/29/2023]
Abstract
Sinus augmentation in conjunction with implant placement is widely considered to be a predictable and successful treatment option for the edentulous posterior maxilla. However, the anatomical changes of the posterior maxilla following tooth extraction (namely alveolar atrophy and pneumatisation of the maxillary sinus) creates unique challenges for implant and prosthodontic rehabilitation. A large volume of literature has been published regarding the surgical indications and treatment planning for implants in the posterior maxilla. In comparison, there is a relative paucity of literature regarding the prosthodontic challenges associated with implants placed in augmented maxillary sinuses. This article describes the scientific background of native and grafted alveolar bone healing in relation to implant rehabilitation. Furthermore, clinical classifications available to assist implant treatment planning are described.
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Affiliation(s)
- Elizabeth M King
- Consultant Senior Lecturer in Restorative Dentistry, University of Bristol, Bristol Dental School, UK.
| | - Jonathon Schofield
- Senior Clinical Lecturer, University of Bristol, Bristol Dental School, UK
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Same-Day Digital Dentistry Restorative Workflow for Single Immediate Provisionalization of Narrow-Diameter Implants: An Exploratory Prospective Study. PROSTHESIS 2023. [DOI: 10.3390/prosthesis5010015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
This study evaluated the two-year clinical outcomes of 3.1 mm diameter dental implants, immediately provisionalized and later restored using same-day dentistry, in 10 patients receiving 11 narrow-diameter (3.1 mm) single implants. Each implant was placed and immediately restored with a provisional crown after placement. At least 2 months after placement, the implant was restored with a prefabricated titanium abutment and an all-ceramic crown using a same-day dentistry protocol. Clinical outcomes, including apical bone loss, probing depths, gingival index, and surgical and prosthetic complications, were documented. There was no implant failure over the course of two years. No surgical complications were reported. Two cases lost provisional crowns. One crown needed to be remade due to esthetic concern. The cumulative two-year survival rate of the implants was 100%. Implant bone loss after two years of functional loading was −0.56 ± 0.54 mm and −0.32 ± 0.68 mm for mesial and distal crestal bone, respectively. Two prosthetic complications included recementation of a crown and remaking of a crown. This exploratory study suggests that immediate provisionalization and a same-day restorative dentistry digital workflow protocol for narrow-diameter implants appear to be predictable clinical procedures with no reported surgical complications and minimal prosthetic complications.
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Reis TAD, Borges GCS, Zancopé K, Neves FDD. Influence of diameter on mechanical behavior of morse taper narrow implants. BRAZILIAN JOURNAL OF ORAL SCIENCES 2022. [DOI: 10.20396/bjos.v21i00.8666036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Dental implants could give back function, esthetics and quality of life to patients. The correct choice of the implant, especially in borderline cases, is essential for a satisfactory result. Aim: Thus, the objective of this study was to evaluate the mechanical behavior of Morse taper implants with two different prosthetic interfaces. Methods: Twenty self-locking Morse taper implants, 2.9 mm in diameter (FAC), and 20 Morse taper implants, 3.5 mm in diameter (CM) were divided into two groups (n=10), and submitted to strength to failure test, optical microscopic evaluation of fracture, metallographic analysis of the alloy, finite element analysis (FEA) and strain gauge test. A Student’s t test (α = 0.05) was made for a statistical analysis. Results: For the strength to failure test, a statistically difference was observed (p <0.001) between FAC (225.0 ± 19.8 N) and CM (397.3 ± 12.5 N). The optical microscopic evaluation demonstrated a fracture pattern that corroborated with FEA´s results. The metallographic analysis determined that the implants of the FAC group have titanium-aluminum-vanadium alloy in their composition. In the strain gauge test, there was no statistical difference (p = 0.833) between CM (1064.8 ± 575.04 μS) and FAC (1002.2 ± 657.6 μS) groups. Conclusion: Based on the results obtained in this study, ultra-narrow implants (FAC) should ideally be restricted to areas with low masticatory effort.
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Ćorić A, Kovačić I, Kiršić SP, Čelebić A. Are Mini Dental Implants Suitable for Support of Crowns or Small Bridges in the Mandibular Incisor Region? A 5-year Longitudinal Study. J Oral Maxillofac Surg 2022; 80:1811-1826. [PMID: 36049532 DOI: 10.1016/j.joms.2022.07.145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 07/22/2022] [Accepted: 07/24/2022] [Indexed: 11/19/2022]
Abstract
PURPOSE It has not been previously studied whether 1-piece category 1 narrow dental implants (≤2.5 mm wide) can successfully support crowns or small bridges. The purpose of this study was to evaluate the long-term benefits of the fixed-type mini dental implants (MDIs) for replacement of mandibular incisors. MATERIALS AND METHODS In a prospective cohort study, fixed-type 1-piece MDIs, replacing single or multiple mandibular incisors, supporting metal-ceramic single crowns (unsplinted group), or splinted crowns/small bridges (splinted group) were observed over the period of 5 years. The primary predictor was the splinting status. The primary outcome variables were peri-implant marginal bone level (MBL) change, success, and survival rates (assessed as per Pisa Consensus Conference). The secondary outcomes were dental patient-reported outcome measures (dPROMs) and oral hygiene assessment. Descriptive statistics, Chi-squared test, t-test, Mann-Whitney and Wilcoxon tests, Kaplan-Meier survival analysis, log-rank (Mantel-Cox) comparison, Cox proportional hazard analyses adjusting for number of implants, Spearman correlation, and repeated measures were used for data analysis. RESULTS From 44 participants (mean age 56.02 ± 5.72 years), 40 completed the 5-year study: 23 in the splinted and 17 in unsplinted group. Three subjects did not respond, while 1 MDI failed (third year) in the unsplinted group. Mean MBL change in both groups was small; however, it increased over time (-0.22 ± 0.38 mm after 1 year; -0.54 ± 0.56 mm after 5 years; P < .05). After 5 years mean MBL change was -0.59 ± 0.71 mm in the unsplinted and -0.50 ± 0.41 mm in the splinted group (P > .05). Survival analysis revealed no significant difference between the unsplinted (85.7% success, 4.8% failures, and 9.5% satisfactory survivals) and splinted group (93.4% success and 6.6% satisfactory survivals) (P > .05). The group affiliation (unsplinted vs splinted) and number of implants were not significant predictors of MDI failure or survival rates (P > .05). Significant improvement in dPROMs after rehabilitation remained unchanged over 5 years (P > .05). Modified plaque index significantly increased over time, correlating with the MBL loss. CONCLUSION MDIs supporting crowns and/or small bridges in the mandibular incisor region showed small rates of marginal bone loss, acceptable success, and survival rates and improved dPROMs over a 5-year observation period.
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Affiliation(s)
- Anka Ćorić
- Health Care Center Mostar, Mostar, Bosnia and Herzegovina & Assistant, Department of Prosthodontics, School of Medicine, University of Mostar, Mostar, Bosnia and Herzegovina
| | - Ines Kovačić
- Assistant, Department of Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia.
| | - Sanja Peršić Kiršić
- Associate Professor, Department of Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
| | - Asja Čelebić
- Professor, Department of Prosthodontics, School of Dental Medicine University of Zagreb, Zagreb, Croatia
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11
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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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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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Sato K, Takahashi M, Takada Y. Construction of Ti-Nb-Ti 2Cu pseudo-ternary phase diagram. Dent Mater J 2020; 39:422-428. [PMID: 31969544 DOI: 10.4012/dmj.2018-394] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this study was to construct a Ti-Nb-Cu ternary phase diagram that plays the role of a map for developing new titanium alloys with excellent machinability and mechanical properties. Fifteen experimental Ti-Nb-Cu ternary alloys composed of Ti-5-30%Nb-2-20%Cu were designed, and ingots made using Ar-arc melting furnace before casting to generate specimen. The alloy castings were evaluated in terms of their microstructures and alloy phases. A Ti-Nb-Ti2Cu pseudo-ternary phase diagram was constructed using X-ray diffractmetry results. Three alloy phases (α-Ti, β-Ti and Ti2Cu) were established within the specimen. Furthermore, the prescence of two-phase coexistence regions (α+Ti2Cu, α+β and β+Ti2Cu), and three-phase coexistence region (α+β+Ti2Cu) was noted. The findings obtained through microstructural observation corresponded well with the constructed phase diagram.
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Affiliation(s)
- Kotaro Sato
- Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry
| | - Masatoshi Takahashi
- Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry
| | - Yukyo Takada
- Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry
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Fracture and Fatigue of Titanium Narrow Dental Implants: New Trends in Order to Improve the Mechanical Response. MATERIALS 2019; 12:ma12223728. [PMID: 31726659 PMCID: PMC6888446 DOI: 10.3390/ma12223728] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 10/18/2019] [Accepted: 10/24/2019] [Indexed: 11/17/2022]
Abstract
Sixty-four fractured commercially pure titanium (cp-Ti) narrow dental implants (NDIs) with similar macrogeometry and connection designs were studied after different implantation times in humans in order to determine their reliability and to evaluate the causes of the fracture. These NDIs were compared with other similar implants, made with alloyed titanium with 15% Zr and with 12% strained titanium. Original implants were tested under static and fatigue conditions, simulating the tri-axial loads in the mouth by means of a Bionix hydraulic test machine. Fractography was studied using field-emission scanning electron microscopy (FSEM). The results showed that cp-Ti NDI exhibits low strength for mechanical cycling, and the alloyed Ti and strained titanium increase the mechanical strength, guaranteeing long term mechanical behavior. NDIs fractured due to fatigue, and, in some cases, the presence of cracks in the original NDIs quickly led to fracture. These cracks were attributed to plastic deformation during machining were found to be exacerbated due to acid etching in the passivation process. All cases of fracture were cp-Ti dental implants due to the low fatigue limit. The results show that, when titanium is alloyed or cold-worked, the fatigue limit is higher than cp-Ti. This in vitro research will help clinicians to select a better NDI system for safer treatment.
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Kovačić I, Peršić S, Kranjčić J, Čelebić A. A cohort study on short mini-implants for mandibular overdentures compared to those of standard length. Clin Oral Implants Res 2019; 31:121-132. [PMID: 31541517 DOI: 10.1111/clr.13542] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 09/12/2019] [Accepted: 09/13/2019] [Indexed: 01/21/2023]
Abstract
OBJECTIVES To assess peri-implant bone level, survival and success rates of short (6 or 8 mm long) one-piece mini-implants (MDIs) in edentulous patients with extremely resorbed alveolar ridge (interforaminal height <10 mm) rehabilitated with mandibular implant overdentures and to compare them with patients having standard length MDIs in 1-year prospective clinical study. MATERIAL AND METHODS The Short MDI group consisted of 28 participants with interforaminal height ≤10 mm. Implants being, both, short and slim (short MDIs: 6 or 8 mm long, 2 or 2.5 mm wide) were inserted. The Standard-MDI group included 35 participants (interforaminal height >13 mm) who received standard length MDIs (10-14 mm long, 2 or 2.5 mm wide). Primary outcomes were assessments of MDI peri-implant bone level, survival and success rates; secondary outcomes were assessments of peri-implant tissue, oral hygiene, and prosthodontic maintenance. RESULTS The Short MDI group had mean marginal bone loss (MBL) of 0.26 ± 0.35 mm, 6.4% of failure, and 92.6% of, both, success and survival rates. The Standard-MDI group had mean MBL of 0.34 ± 0.40 mm, 5% of failure, 95% of survival, and 94.3% success. There were no significant differences in MBL (p = .420), survival (p = .414), and success (p = .571) between the groups. The Short MDI group had significantly less plaque (p = .001) and bleeding on probing (p < .001). CONCLUSION Within the limitations of this study, short MDIs (6 or 8 mm long) in extremely atrophied mandibles (interforaminal height <10 mm) showed good clinical results in the first year of function.
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Affiliation(s)
- Ines Kovačić
- Department of Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
| | - Sanja Peršić
- Department of Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
| | - Josip Kranjčić
- Department of Prosthodontics, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
| | - Asja Čelebić
- Department of Prosthodontics, School of Dental Medicine & Clinical Hospital Centre Zagreb, University of Zagreb, Zagreb, Croatia
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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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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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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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Abstract
Edentulous sites are often characterized by inadequate bone volume for dental implant therapy. Bone augmentation procedures for site development involve longer healing period and are often invasive, costly, and associated with postoperative morbidity. This article discusses alternatives to invasive bone grafting procedures that are often used to develop implant sites. Owing to the broad nature of this topic, it is presented in two articles. In part I, the use of short and narrow-diameter implants are discussed. Part II reviews the use of tilted as well as fewer implants to support a prosthesis.
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Si M, Zhang Y, Li J, He F. Retrospective study on the clinical outcomes of small-diameter implants supporting fixed prostheses without bone augmentation in the posterior region after 2 to 12 years. Clin Implant Dent Relat Res 2019; 21:454-461. [PMID: 31025491 DOI: 10.1111/cid.12782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Small-diameter implants (SDIs: diameter <3.5 mm) are often chosen as an alternative to bone augmentation in clinical practice, but the scientific evidence regarding SDI application in the posterior area remains deficient. PURPOSE To evaluate the clinical and radiographic outcomes of SDIs supporting fixed prostheses without bone augmentation in the posterior region, and to analyze the potential influencing factors related to SDI failures. MATERIALS AND METHODS Clinical and radiographic data of 243 SDIs in 156 patients were retrospectively assembled after 2 to 12 (mean 4.75) years of follow-up. Implant and prosthesis failures, mechanical and biological complications, and radiographic marginal bone loss (MBL) were evaluated. The influence of patient/implant characteristics and prosthetic design on SDI failures was investigated. RESULTS Five implants in five patients failed, contributing to 10-year cumulative survival rates of 97.9% on an implant-based analysis and 96.8% on a patient-based analysis. Biological complications and mechanical complications were detected in 22 (9.1%) and 31 (12.8%) of implants, respectively. No implant fracture was detected. Peri-implant MBL during 10 years was 0.60 ± 0.90 mm on average. The implant type (bone-level or tissue-level) was the only factor that significantly influenced SDI failures. CONCLUSION SDIs supporting fixed prostheses in the posterior region achieved predictable long-term clinical outcomes. However, tissue-level titanium SDIs should be avoided where possible.
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Affiliation(s)
- Misi Si
- Department of Oral Implantology, Stomatology Hospital affiliated to the School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yu Zhang
- Department of Prevention and Health protection, Hangzhou Dental Hospital, Hangzhou, Zhejiang, China
| | - Jiaying Li
- Mingyang Dental Clinic Yuhang, Hangzhou, Zhejiang, China
| | - Fuming He
- Department of Oral Implantology and Prosthodontics, Stomatology Hospital affiliated to the School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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Hotchkiss KM, Sowers KT, Olivares-Navarrete R. Novel in vitro comparative model of osteogenic and inflammatory cell response to dental implants. Dent Mater 2018; 35:176-184. [PMID: 30509481 DOI: 10.1016/j.dental.2018.11.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 10/14/2018] [Accepted: 11/13/2018] [Indexed: 01/17/2023]
Abstract
OBJECTIVES Roughened dental implants promote mesenchymal stem cell (MSCs) osteoblastic differentiation, and hydrophilic modifications induce anti-inflammatory macrophages activation. While the effect of different surface modifications on osseointegration of commercial dental implants have been compared in vivo and clinically, the initial cellular response to these modifications often overlooked. We aimed to characterize the macrophage inflammatory response and MSC osteogenesis across different commercially available implants in vitro. METHODS Six commercially available rough implants [OsseoSpeed™ (Astra-Tech™, Implant A); Osseotite® (Biomet 3i™, Implant B); TiUnite™ (Nobel-Biocare®, Implant C); Ti-SLA®, (Implant D), Roxolid® (RXD-SLA, Implant E), RXD-SLActive® (Implant F) (Straumann®)] were examined. Macrophages and MSCs were seeded directly on implants and cultured in custom vials. mRNA and protein levels of pro- (IL1B, IL6, IL17A, CXCL10, TNFa) and anti- (IL4, IL10, TGFB1) inflammatory markers were measured after 24 and 48h in macrophages. Osteoblastic differentiation of MSCs was assessed after seven days by alkaline phosphatase activity, osteocalcin, and angiogenic, osteogenic, and inflammatory markers by ELISA and qPCR (n=6/variable, ANOVA, post hoc Tukey HSD with α=0.05). RESULTS Hydrophilic implant F induced the highest level of osteogenic factor released from MSCs and anti-inflammatory factors from macrophages with the lowest level of pro-inflammatory factors. Alternatively, implants A and C supported lower levels of osteogenesis and increased secretion of pro-inflammatory factors. SIGNIFICANCE In this study, we successfully evaluated differences in cell response to commercially available clinical implants using an in vitro model. Data from this model suggest that not all surface modification procedures generate the same cell response.
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Affiliation(s)
- Kelly M Hotchkiss
- Department of Biomedical Engineering, School of Engineering, Virginia Commonwealth University, Richmond, VA, USA
| | - Kegan T Sowers
- 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.
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Abstract
Dental implants are a mainstream treatment protocol to replace missing teeth. Patient and clinician demands have led to shorter length and narrower diameter implants, immediately placed implants into infected sites, and the use of implants in children. This article reviews some of the controversial topics in implant dentistry, and presents the evidence that supports and challenges these newer techniques. Because long-term studies are often not available, especially for implants in infected sites, mini implants, and implants in the growing patient, the field continues to evolve.
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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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Choi JW, Choi KH, Chae HJ, Chae SK, Bae EB, Lee JJ, Lee SH, Jeong CM, Huh JB. Load-Bearing Capacity and Retention of Newly Developed Micro-Locking Implant Prosthetic System: An In Vitro Pilot Study. MATERIALS 2018; 11:ma11040564. [PMID: 29642407 PMCID: PMC5951448 DOI: 10.3390/ma11040564] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/04/2018] [Accepted: 04/04/2018] [Indexed: 11/16/2022]
Abstract
The aim of this study was to introduce the newly developed micro-locking implant prosthetic system and to evaluate the resulting its characteristics. To evaluate load-bearing capacity, 25 implants were divided into five groups: external-hexagon connection (EH), internal-octagon connection (IO), internal-hexagon connection (IH), one-body implant (OB), micro-locking implant system (ML). The maximum compressive load was measured using a universal testing machine (UTM) according to the ISO 14801. Retention was evaluated in two experiments: (1) a tensile test of the structure modifications of the components (attachment and implant) and (2) a tensile test after cyclic loading (total 5,000,000 cycles, 100 N, 2 Hz). The load-bearing capacity of the ML group was not significantly different from the other groups (p > 0.05). The number of balls in the attachment and the presence of a hexagonal receptacle did not show a significant correlation with retention (p > 0.05), but the shape of the retentive groove in the implant post had a statistically significant effect on retention (p < 0.05). On the other hand, the retention loss was observed during the initial 1,000,000 cycles, but an overall constant retention was maintained afterward. Various preclinical studies on this novel micro-locking implant prosthetic system should continue so that it can be applied in clinical practice.
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Affiliation(s)
- Jae-Won Choi
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Kyung-Hee Choi
- Research and Development Institute, Cowellmedi Co., Ltd., Busan 46986, Korea.
| | - Hee-Jin Chae
- Research and Development Institute, Samwon Dental Medical Precise Co., Ltd., Yangsan 50603, Korea.
| | - Sung-Ki Chae
- Research and Development Institute, Samwon Dental Medical Precise Co., Ltd., Yangsan 50603, Korea.
| | - Eun-Bin Bae
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jin-Ju Lee
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - So-Hyoun Lee
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Chang-Mo Jeong
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jung-Bo Huh
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
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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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26
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Maló PS, de Araújo Nobre MA, Lopes AV, Ferro AS. Retrospective cohort clinical investigation of a dental implant with a narrow diameter and short length for the partial rehabilitation of extremely atrophic jaws. J Oral Sci 2017; 59:357-363. [PMID: 28904311 DOI: 10.2334/josnusd.16-0321] [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] [Indexed: 11/01/2022]
Abstract
We investigated the short-term clinical outcomes of narrow-diameter short-length implants for the fixed-prosthetic partial rehabilitation of extremely resorbed jaws. Twenty-three patients requiring partial rehabilitations with narrow-platform short-length implants in any jaw were included in this study. In total, 30 implants 3.3 mm in diameter and 7 (n = 15 implants) or 8.5 (n = 15 implants) mm in length were inserted. The primary outcome measure was implant cumulative survival rate (CSR); the secondary outcome measures were marginal bone resorption at 1 and 3 years and the incidence of biologic and mechanical complications. Five patients (21.7%) with six implants (20%) were lost to follow-up. Two implants failed in two patients, yielding a CSR at 3 years of follow-up of 93.4%. The average (standard deviation) marginal bone resorption was 1.34 mm (0.95 mm) after the first year and 1.38 mm (0.78 mm) after the third year. Biologic complications occurred in three patients; mechanical complications occurred in three patients. Despite the limitations of the study, our findings show that the use of new narrow-diameter short-length implants for the rehabilitation of extremely atrophic regions is viable in the short-term, and can be considered a treatment alternative in extremely resorbed jaws.
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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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28
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Takahashi M, Kikuchi M, Takada Y. Mechanical properties and microstructures of dental cast Ti-6Nb-4Cu, Ti-18Nb-2Cu, and Ti-24Nb-1Cu alloys. Dent Mater J 2017; 35:564-70. [PMID: 27477221 DOI: 10.4012/dmj.2015-354] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The mechanical properties -tensile strength, yield strength, elongation after fracture, and Vickers hardness- and alloy phases of the dental cast alloys Ti-6%Nb-4%Cu, Ti-18%Nb-2%Cu, and Ti-24%Nb-1%Cu were investigated. Ti-6%Nb-4%Cu consisted of a single α-phase, while Ti-18%Nb-2%Cu and Ti-24%Nb-1%Cu consisted of α- and β-phases. The tensile strengths, yield strengths, and hardnesses of these alloys were higher than those of Ti-5%Cu and Ti-30%Nb; however, their breaking elongations were smaller. These differences in the mechanical properties are attributable to solid-solution strengthening or to precipitation strengthening by the dual-phase (α+β) structure. Thus, Ti-Nb-Cu alloys are suitable for use in high-strength dental prostheses, such as implantretained superstructures and narrow-diameter implants.
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Affiliation(s)
- Masatoshi Takahashi
- Division of Dental Bioaterials, Tohoku University Graduate School of Dentistry
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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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Giannakopoulos NN, Ariaans K, Eberhard L, Klotz AL, Oh K, Kappel S. Immediate and delayed loading of two-piece reduced-diameter implants with locator-analog attachments in edentulous mandibles: One-year results from a randomized clinical trial examining clinical outcome and patient expectation. Clin Implant Dent Relat Res 2017; 19:643-653. [PMID: 28440024 DOI: 10.1111/cid.12489] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 02/28/2017] [Accepted: 04/01/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Prosthetic management of thin alveolar ridges in the edentulous mandibles of elderly patients, especially the time of loading, the number of implants needed, and patient expectations and perception, is a challenge in implant dentistry. PURPOSE Survival of conventionally and immediately loaded 2-piece reduced-diameter implants in the interforaminal region of the edentulous mandible supporting locator-analog attachments was evaluated. Prosthetic complications and peri-implant hygiene were also studied, and patient expectation and subjective evaluation of the treatment were documented. MATERIAL AND METHODS Twenty-five patients with adapted complete dentures received 4 reduced-diameter implants. All anterior implants were immediately loaded. Three months later, patients were allocated by randomization to 1 of 2 treatment groups: 2 locator-analog attachments on the anterior implants (Group A); or 4 locator-analog attachments (Group B). After another 3 months patient allocation was changed (crossover design) for the next 3 months. Questionnaires with Likert scales and numeric rating scales were used to assess patients' expectations and subjective overdenture-related variables, respectively. RESULTS One implant was lost in the immediate-loading group. Survival was 98% and 100% for immediate and delayed loading, respectively. During 12-month observation, 8 complications required aftercare. At the beginning of treatment, patients' expectations were highly positive. Subjective assessment of overdenture-related variables 3 months after immediate loading of 2 implants revealed a statistically significant improvement for most of the variables studied; this was maintained 1 year later. In the subjective assessments, there were no statistically significant differences between Groups A and B. CONCLUSION Immediate loading of reduced-diameter implants supporting locator-analog attachments resulted in high implant survival, few prosthetic complications, good oral hygiene, and improvement of subjective denture perception in the short-term. It might be a promising treatment option, especially for elderly patients with a narrow mandibular ridge.
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Affiliation(s)
| | - Kirsten Ariaans
- Department of Prosthodontics, University of Heidelberg, INF 400, Heidelberg, 69120, Germany
| | - Lydia Eberhard
- Department of Prosthodontics, University of Heidelberg, INF 400, Heidelberg, 69120, Germany
| | - Anna-Luisa Klotz
- Department of Prosthodontics, University of Heidelberg, INF 400, Heidelberg, 69120, Germany
| | - Keunyoung Oh
- Department of Prosthodontics, University of Heidelberg, INF 400, Heidelberg, 69120, Germany
| | - Stefanie Kappel
- Department of Prosthodontics, University of Heidelberg, INF 400, Heidelberg, 69120, Germany
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Abstract
Oral implantology has become a major discipline within the field of dentistry. Small or mini dental implants have demonstrated success in the retention of removable and fixed prostheses. Small-diameter implants (SDI) and mini-diameter implants (MDI) describe a group of implants that demonstrate a diameter less than 3 mm. This retrospective study reports on 335 SDI placed during a 7-year period. All implants were placed in healed sites (>6 months) and loaded immediately or after waiting 3 months. A total of 321 implants were restored and functional within the study's time interval. A total of 14 implants failed, resulting in a 96.1% implant success rate. Treatment plan considerations should include prosthetic design, specific arch, and immediate load. Overall, SDI can be utilized as an alternative implant treatment option for patients with atrophic bone, compromised medical histories and financial constraints.
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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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33
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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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Immediate Nonfunctional Loading of Two Single-Maxillary Postextractive Implants: 6-Year Postloading Results of Two Case Reports. Case Rep Dent 2016; 2016:6816907. [PMID: 27293915 PMCID: PMC4884799 DOI: 10.1155/2016/6816907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 03/30/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022] Open
Abstract
Objectives. The aim of the study was to evaluate and compare crestal bone loss of single-maxillary immediate postextractive implants and immediate nonfunctional loading (INFL) during 72 months of follow-up. Material and Methods. Two single titanium implants (Certain Prevail, Biomet 3I, USA) were placed in two patients using INFL technique. Implant stability and crestal bone level were measured on periapical radiographs at 1, 3, and 6 months after surgery. Results. All osseointegrated implants were clinically successful after 6 years of functional loading. Conclusion. Within the limit of the present case report, the paper supports the concept that INFL of single dental implant can be a successful treatment procedure.
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35
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The Use of Narrow Diameter Implants in the Molar Area. Int J Dent 2016; 2016:8253090. [PMID: 27293436 PMCID: PMC4879234 DOI: 10.1155/2016/8253090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/06/2016] [Accepted: 04/06/2016] [Indexed: 02/08/2023] Open
Abstract
Implant rehabilitations in the posterior jaw are influenced by many factors such as the condition of the remaining teeth, the force factors related to the patient, the quality of the bone, the maintenance of the hygiene, the limited bone height, the type and extent of edentulism, and the nature of the opposing arch. The gold standard is to place a regular diameter implant (>3.7 mm) or a wide one to replace every missing molar. Unfortunately, due to horizontal bone resorption, this option is not possible without lateral bone augmentation. In this situation, narrow diameter implant (NDI < 3.5 mm) could be the alternative to lateral bone augmentation procedures. This paper presents a clinical study where NDIs were used for the replacement of missing molars. They were followed up to 11 years. Special considerations were observed and many parameters were evaluated. NDI could be used to replace missing molar in case of moderate horizontal bone resorption if strict guidelines are respected. Yet, future controlled prospective clinical trials are required to admit their use as scientific evidence.
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36
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Hotchkiss KM, Ayad NB, Hyzy SL, Boyan BD, Olivares-Navarrete R. Dental implant surface chemistry and energy alter macrophage activationin vitro. Clin Oral Implants Res 2016; 28:414-423. [DOI: 10.1111/clr.12814] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2016] [Indexed: 12/28/2022]
Affiliation(s)
- Kelly M. Hotchkiss
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
| | - Nancy B. Ayad
- 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
| | - Barbara D. Boyan
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
- Wallace H. Coulter Department of Biomedical Engineering at Georgia Tech and Emory University; Georgia Institute of Technology; Atlanta GA USA
| | - Rene Olivares-Navarrete
- Department of Biomedical Engineering; School of Engineering; Virginia Commonwealth University; Richmond VA USA
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37
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Kumari P, Verma M, Sainia V, Gupta A, Gupta R, Gill S. Mini-Implants, Mega Solutions: A Case Series. J Prosthodont 2015; 25:682-686. [DOI: 10.1111/jopr.12382] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2015] [Indexed: 11/29/2022] Open
Affiliation(s)
- Pooja Kumari
- Department of Prosthodontics; Maulana Azad Institute of Dental Sciences; New Delhi India
| | - Mahesh Verma
- Department of Prosthodontics; Maulana Azad Institute of Dental Sciences; New Delhi India
| | | | - Ankur Gupta
- Department of Prosthodontics; Maulana Azad Institute of Dental Sciences; New Delhi India
| | - Rekha Gupta
- Department of Prosthodontics; Maulana Azad Institute of Dental Sciences; New Delhi India
| | - Shubhra Gill
- Department of Prosthodontics; Maulana Azad Institute of Dental Sciences; New Delhi India
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38
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Ioannidis A, Gallucci GO, Jung RE, Borzangy S, Hämmerle CHF, Benic GI. Titanium-zirconium narrow-diameter versus
titanium regular-diameter implants for anterior and premolar single crowns: 3-year results of a randomized controlled clinical study. J Clin Periodontol 2015; 42:1060-70. [DOI: 10.1111/jcpe.12468] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2015] [Indexed: 10/23/2022]
Affiliation(s)
- Alexis Ioannidis
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - German O. Gallucci
- Department of Restorative Dentistry and Biomaterials Sciences; Harvard School of Dental Medicine; Boston MA USA
| | - Ronald E. Jung
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - Sary Borzangy
- Department of Restorative Dentistry and Biomaterials Sciences; Harvard School of Dental Medicine; Boston MA USA
- Department of Substitutive Dental Sciences; College of Dentistry; Taibah University; Al Madinah Al Munawwarah Kingdom of Saudi Arabia
| | - Christoph H. F. Hämmerle
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - Goran I. Benic
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
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39
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Jackson BJ. Small-Diameter Implant Treatment Plan Revision: Management of Complications. J ORAL IMPLANTOL 2015; 42:295-8. [PMID: 26390370 DOI: 10.1563/aaid-joi-d-15-00083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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40
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Anitua E, Saracho J, Begoña L, Alkhraisat MH. Long-Term Follow-Up of 2.5-mm Narrow-Diameter Implants Supporting a Fixed Prostheses. Clin Implant Dent Relat Res 2015; 18:769-77. [DOI: 10.1111/cid.12350] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Eduardo Anitua
- Oral implantology; Eduardo Anitua Foundation; Vitoria Spain
- Eduardo Anitua Foundation; Vitoria Spain
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41
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Tolentino L, Sukekava F, Garcez-Filho J, Tormena M, Lima LA, Araújo MG. One-year follow-up of titanium/zirconium alloy X commercially pure titanium narrow-diameter implants placed in the molar region of the mandible: a randomized controlled trial. Clin Oral Implants Res 2015; 27:393-8. [PMID: 25692479 DOI: 10.1111/clr.12561] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To analyze marginal bone loss (MBL) and clinical parameters around narrow-diameter implants (NDIs - 3.3 mm) made of titanium/zirconium alloy (TiZr) in comparison with commercially pure titanium (cpTi) installed in the molar region of the mandible after 1 year in function. MATERIALS AND METHODS Ten patients participated in the study. A TiZr and a cpTi NDI were randomly installed in contralateral molar sites of the mandible of each patient in a split-mouth design. Eight weeks after healing, all metal-ceramic single crowns were adapted to the implants and patients were enrolled in a plaque control program. MBL at the mesial and distal aspects of the implants were evaluated by comparing periapical radiographs taken immediately after prosthesis installation (T1) and 1 year after loading (T2). Clinical probing depth, bleeding on probing, suppuration, visible plaque and implant mobility were evaluated to determine implant success and survival rates. RESULTS Mean MBL at the interproximal aspects of TiZr implant sites was 0.32 ± 0.27 mm, while at cpTi implant sites mean MBL was 0.35 ± 0.24 mm (P = 0.60). Both TiZr and cpTi NDIs presented 100% implant survival and success rates, with no significant differences in the clinical parameters studied (P > 0.05). CONCLUSION TiZr and cpTi NDIs presented similar outcomes after 1 year in function in the molar region of the mandible. The results suggest that TiZr and cpTi NDIs may be equally used to support single crowns in the posterior area of the mouth. However, further studies with longer follow-up periods are necessary to confirm these findings.
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Affiliation(s)
- L Tolentino
- Division of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - F Sukekava
- Division of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | | | - M Tormena
- Department of Dentistry, State University of Maringá, Maringá, Brazil
| | - L A Lima
- Division of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - M G Araújo
- Department of Dentistry, State University of Maringá, Maringá, Brazil
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42
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Coelho Goiato M, Pesqueira AA, Santos DMD, Haddad MF, Moreno A. Photoelastic stress analysis in prosthetic implants of different diameters: mini, narrow, standard or wide. J Clin Diagn Res 2014; 8:ZC86-90. [PMID: 25386531 DOI: 10.7860/jcdr/2014/8489.4902] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 05/29/2014] [Indexed: 11/24/2022]
Abstract
PURPOSE This study investigated the biomechanical behavior of screwed partial fixed prosthesis supported by implants with different diameters (2.5 mm; 3.3 mm and 3.75 mm) by using a photoelastic analysis. MATERIALS AND METHODS Six photoelastic models were fabricated in PL-2 resin as single crowns or splinted 3-unit piece. Models were positioned in a circular polariscope and 100-N axial and oblique (45 degrees) loads were applied in the occlusal surface of the crowns by using a universal testing machine (EMIC). The stresses were photographically recorded and qualitatively analyzed using a software (Adobe Photoshop). RESULTS Under axial loading, the number of fringes was inversely proportional to the diameter of the implants in the single crown models. In the splinted 3-unit piece, the 3.75-mm implant promoted lower number of fringes regardless of loading area application. Under oblique loading, a slight increase of fringes number was observed for all groups. CONCLUSION The standard implant diameter promoted better stress distribution than the narrow and mini diameter implants. Additionally, the splinted crowns showed a more uniform stress distribution.
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Affiliation(s)
- Marcelo Coelho Goiato
- Adjunct Professor, Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University -UNESP, Araçatuba, São Paulo, Brazil
| | - Alves Aldiéris Pesqueira
- Associate Professor, Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University-UNESP , Araçatuba, São Paulo, Brazil
| | - Daniela Micheline Dos Santos
- Associate Professor, Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP , Araçatuba, São Paulo, Brazil
| | - Marcela Filié Haddad
- Adjunct Professor, Federal University of Department of Dental Materials and Prosthodontics , Alfenas - UNIFAL
| | - Amália Moreno
- Post-Graduate Student, Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University-UNESP , Araçatuba, São Paulo, Brazil
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Wu X, Al-Abedalla K, Rastikerdar E, Abi Nader S, Daniel NG, Nicolau B, Tamimi F. Selective serotonin reuptake inhibitors and the risk of osseointegrated implant failure: a cohort study. J Dent Res 2014; 93:1054-61. [PMID: 25186831 DOI: 10.1177/0022034514549378] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Selective serotonin reuptake inhibitors (SSRIs), the most widely used drugs for the treatment of depression, have been reported to reduce bone formation and increase the risk of bone fracture. Since osseointegration is influenced by bone metabolism, this study aimed to investigate the association between SSRIs and the risk of failures in osseointegrated implants. This retrospective cohort study was conducted on patients treated with dental implants from January 2007 to January 2013. A total of 916 dental implants in 490 patients (94 implants on 51 patients using SSRIs) were used to estimate the risk of failure associated with the use of SSRIs. Data analysis involved Cox proportional hazards, generalized estimating equation models, multilevel mixed effects parametric survival analysis, and Kaplan-Meier analysis. After 3 to 67 mo of follow-up, 38 dental implants failed and 784 succeeded in the nonusers group, while 10 failed and 84 succeeded in the SSRI-users group. The main limitation of this retrospective study was that drug compliance dose and treatment period could not be acquired from the files of the patients. The primary outcome was that compared with nonusers of SSRIs, SSRI usage was associated with an increased risk of dental implants failure (hazard ratio, 6.28; 95% confidence interval, 1.25-31.61; p = .03). The failure rates were 4.6% for SSRI nonusers and 10.6% for SSRI users. The secondary outcomes were that small implant diameters (≤4 mm; p = .02) and smoking habits (p = .01) also seemed to be associated with higher risk of implant failure. Our findings indicate that treatment with SSRIs is associated with an increased failure risk of osseointegrated implants, which might suggest a careful surgical treatment planning for SSRI users.
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Affiliation(s)
- X Wu
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - K Al-Abedalla
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - E Rastikerdar
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - S Abi Nader
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - N G Daniel
- East Coast Oral Surgery, Moncton, New Brunswick, Canada
| | - B Nicolau
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - F Tamimi
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
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44
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Implant-abutment interface: A comparison of the ultimate force to failure among narrow-diameter implant systems. J Prosthet Dent 2014; 112:136-42. [DOI: 10.1016/j.prosdent.2014.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 01/27/2014] [Accepted: 01/30/2014] [Indexed: 11/23/2022]
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45
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Implant diameter and length influence on survival: interim results during the first 2 years of function of implants by a single manufacturer. IMPLANT DENT 2014; 22:394-8. [PMID: 23811719 DOI: 10.1097/id.0b013e31829afac0] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The aim of the present study was to evaluate the influence of implant length and diameter on implant survival. METHODS A retrospective cohort of 787 consecutive patients from 2 private practices between the years 2008 and 2011 had been evaluated. Patient demographics, site and implant characteristics, and time of follow-up were recorded from the medical files. RESULTS Overall, 3043 implants were investigated. Overall survival rate was 98.7% with 39 implant failures recorded. Survival rates for narrow- (<3.75 mm), regular- (3.75-5 mm), and wide- (>5 mm) diameter implants were 98.2%, 98.7%, and 98.5%, respectively (P = 0.89). Survival rates of short (<10 mm) and regular (10 mm and above) implants were 97% and 98.7%, respectively (P = 0.22). CONCLUSIONS Implant length and diameter were not found to be significant factors affecting implant survival during the first 2 years of function in the present investigation of this specific implant system by a single manufacturer. Further long-term follow-up studies are warranted because 2-years are only interim short-term results when dealing with dental implants.
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47
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Stress analysis in bone tissue around single implants with different diameters and veneering materials: A 3-D finite element study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4700-14. [DOI: 10.1016/j.msec.2013.07.027] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 06/15/2013] [Accepted: 07/20/2013] [Indexed: 11/24/2022]
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48
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Bural C, Bilhan H, Cilingir A, Geçkili O. Assessment of demographic and clinical data related to dental implants in a group of Turkish patients treated at a university clinic. J Adv Prosthodont 2013; 5:351-8. [PMID: 24049578 PMCID: PMC3774951 DOI: 10.4047/jap.2013.5.3.351] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 07/01/2013] [Accepted: 07/08/2013] [Indexed: 11/08/2022] Open
Abstract
PURPOSE This retrospective study analyzed the distribution of the dental implants with regards to age and gender of the patients and type of indication for the implant therapy, as well as the location, dimension and type of the implants. MATERIALS AND METHODS The data of demographics (age and gender), type of indication for implant therapy, anatomical location, dimensions (length and diameter) and type (bone and tissue level) of 1616 implants were recorded from patient charts between January 2000 and January 2010. Descriptive statistics were analyzed using a chi-squared test for demographic parameters, type of indication, tooth position, anatomical location, implant dimensions and type (α=.05). RESULTS The patient pool comprised of 350 women and 266 men, with a mean age of 52.12 ± 13.79 years. The difference in n% of the implants of the age groups was statistically significant between the types of indications. The difference in the position of the implants was statistically significant between the n% of the implants of all age groups. Gender did not significantly vary, except that the diameter of the implants was significantly higher for the standard diameter implants in males. The difference between the implant positions was statistically significant when considered according to indication. The relationship between implant length and anatomical location was statistically significant. CONCLUSION The indication for dental implant use is age dependent and the type and size of the implant seems to be strongly related to the location of the implant.
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Affiliation(s)
- Canan Bural
- Istanbul University, Faculty of Dentistry, Department of Prosthodontics, Istanbul, Turkey
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49
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Benic GI, Gallucci GO, Mokti M, Hämmerle CHF, Weber HP, Jung RE. Titanium-zirconium narrow-diameter versus titanium regular-diameter implants for anterior and premolar single crowns: 1-year results of a randomized controlled clinical study. J Clin Periodontol 2013; 40:1052-61. [DOI: 10.1111/jcpe.12156] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Goran I. Benic
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - German O. Gallucci
- Department of Restorative Dentistry and Biomaterials Sciences; Harvard School of Dental Medicine; Boston MA USA
| | - Muizzaddin Mokti
- Department of Restorative Dentistry and Biomaterials Sciences; Harvard School of Dental Medicine; Boston MA USA
| | - Christoph H. F. Hämmerle
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - Hans-Peter Weber
- Department of Prosthodontics and Operative Dentistry; Tufts University School of Dental Medicine; Boston MA USA
| | - Ronald E. Jung
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
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Ortega-Oller I, Suárez F, Galindo-Moreno P, Torrecillas-Martínez L, Monje A, Catena A, Wang HL. The influence of implant diameter on its survival: a meta-analysis based on prospective clinical trials. J Periodontol 2013; 85:569-80. [PMID: 23905841 DOI: 10.1902/jop.2013.130043] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND The use of narrow-diameter implants has been proposed to restore small edentulous spans, thus avoiding extensive bone augmentation procedures and reducing the surgical complexity of implant rehabilitations. Although success rates of narrow-diameter implants have already been analyzed in the literature, to the best of the authors' knowledge, no meta-analysis based on prospective and randomized controlled trials has been performed. The aim of this study is to analyze the survival rates of narrow-diameter implants compared with standard or wide-diameter implants. METHODS An electronic search from three databases and a hand search in implant-related journals of studies published in English before September 1, 2012 were performed. Prospective human clinical studies with at least 10 implants and a follow-up period of 1 year were included in the meta-analysis. Implants were divided into two groups based on their diameters. RESULTS The initial search yielded 484 articles, of which 49 were evaluated in full text for eligibility. Finally, 16 studies were chosen and separated into two groups: 1) implants of diameter <3.3 mm (group 1) and 2) implants of diameter ≥3.3 mm (group 2). A meta-analysis performed for groups 1 and 2 showed survival rates of 75% and 87%, respectively. CONCLUSIONS This meta-analysis showed that narrower implants (<3.3 mm) had significantly lower survival rates compared with wider implants (≥3.3 mm). Other variables, such as type of prosthesis, implant surface, and timing of prosthetic loading, were found to have influenced the implant survival rates.
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