Retrospective Evaluation of Failure Rate of 1,000 Immediate Implants Placed in Fresh Extraction Sockets and Their Risk Factors Pubmed



Amini S¹ ; Salehi A¹ ; Shahmohammadi R² ; Ranji P³ Show Affiliations
Source: American Journal of Dentistry Published:2022

Abstract

Purpose: To evaluate the failure rate of 1,000 immediately placed implants in fresh extraction sockets and their risk factors. Methods: The data comprised files of 1,000 fresh socket implants placed during the 2014-2019 interval in three Tehran-based private dental clinics. The statistical method was survival analysis consisting of shared frailty and intra-cluster correlation. Moreover, Chi-squared test and Mann-Whitney U test were used to statistically analyze the relationship between each independent variable and the response variable (immediate implant failure). Results: 40 cases of failures among the implants were found, accounting for a 4% failure rate. Shared frailty survival model indicated that only the implant system significantly affects the failure rate. Intra-clustered correlation was 0.41. Chi-squared analysis showed that gender and implant system both significantly affect immediate implant failure. None of the quantitative variables were significantly related to immediate implant failure according to the Mann-Whitney U test. © 2022 Mosher and Linder, Inc. All rights reserved.