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Volume 20 , Issue 6
November/December 2005

Pages 930–937


Survival Estimates and Risk Factors for Failure with 6 3 5.7-mm Implants

Michael A. Gentile, DMD / Sung-Kiang Chuang, DMD, MD / Thomas B. Dodson, DMD, MPH


PMID: 16392351

Survival Estimates and Risk Factors for Failure with 6 3 5.7-mm Implants Michael A. Gentile, DMD1/Sung-Kiang Chuang, DMD, MD2/Thomas B. Dodson, DMD, MPH3 Purpose: Short dental implants facilitate prosthetic restoration in the setting of limited alveolar bone height. The study objectives were to (1) estimate the 1-year survival of Bicon 6 3 5.7-mm implants, (2) compare the 1-year survival of 6 3 5.7-mm implants with that of non–6 3 5.7-mm implants, and (3) identify risk factors associated with implant failure. Materials and Methods: A retrospective cohort study design was used. The sample was composed of patients who had received at least one 6 3 5.7-mm implant. Predictor variables were categorized as demographic, health status, anatomic, implant-specific, prosthetic, perioperative, and reconstructive. The outcome variable was implant failure, defined as explantation. Appropriate descriptive, bivariate, and multivariate survival statistics were computed. Results: The sample was composed of 35 patients in whom 172 implants had been placed (45 of which were 6 3 5.7-mm). The 1-year survival rates for 6 3 5.7-mm and non–6 3 5.7-mm implants were 92.2% and 95.2%, respectively (P = .76). After adjusting for covariates in a multivariate model, implant size was not associated with failure (P = .95). Discussion: The comparable survival estimates for 6 3 5.7-mm implants and non–6 3 5.7-mm implants in this study suggested that 6 3 5.7-mm implants can become osseointegrated and bear a functional load after placement. Conclusions: The survival of 6 3 5.7-mm implants was comparable to that of non–6 3 5.7-mm implants. Int J Oral Maxillofac Implants 2005;20:930–937
Key words: dental implants, implant survival, oral surgery, risk factors, short implants


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