Related Experiment Video
Updated: Sep 24, 2025
Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness
Published on: March 14, 2025
Retrospective evaluation of failure rate of 1,000 immediate implants placed in fresh extraction sockets and their
Shirin Amini1, Ali Salehi2, Rojin Shahmohammadi3
1Private practice, Tehran, Iran.
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.
Clinical Significance:
The data was gathered using a relatively large sample size to perform a reliable evaluation on success and predictability of implants placed into fresh extraction sites. A brief review on articles focusing on fresh socket implant success or failure published from years 2000-2020 is presented.
