Abstract: Objective: To analyze the factors related to the failure of implants in the department of stomatology in the past five years. Methods: A total of 392 cases were implanted in the Department of Oral Implantol-ogy of People's Hospital of Sichuan Province from January 2013 to December 2017. A total of 392 men were enrolled in this study, 212 of whom were males and 180 were females. A total of 598 implants were implanted. There were 116 Dentiums, 170 American Biohorizons, and 312 Straumanns from Switzerland. Table analysis was performed. Chi-square test was used to analyze the early failure of the implants in terms of gender, different implant systems, different bone augmentation procedures, different implant sites, and implant size. The relevant factors of the rate. Results: According to the analysis of case data, there were 8 cases of early failure within 5 years and 10 implants. The early failure rate of implants was 1.67%. In terms of gender, the early failure rate after implantation was not statistically significant(p>0.05), there was no significant difference in early failure rate between different implant systems(p>0.05), the ear-ly failure of maxillary sinus extraction and bone grafting. The rate was highest, but it was not statistically significant compared to other bone augmentation surgeries. The number of implanted mandibular anterior teeth was the lowest but the early failure rate was higher than other sites and statistically significant (p< 0.05), fine implants (Diameter≤3.8mm), the early failure rate of short implants(length≤10mm) was signifi-cantly higher than other types of implants, and there was a statistically significant(p<0.05). Conclusions: The early failure rate of implants in the anterior mandibular area, narrow implants and short implant placements are much higher.

Key words: dental implants, early failure, risk factors