Abstract: Objective: A follow-up study of 100 implanted patients in our hospital was conducted to investigate the retention rate, complications and risk factors of implants after implant restoration, in order to prevent and reduce the occurrence of implant restoration complications. Methods: 100 patients who underwent implant restoration in our hospital from January 2017 to September 2019 were enrolled in the study. The patient's admission information, basic clinical data, implant restoration and complications were recorded, and the complications were discussed. Results: The study included 100 patients with dental implants from January 2017 to September 2019, and 143 implants. The total number of implants was removed and dropped, and the retention rate was 97.90%. There was no significant difference in the retention rate of implants and the incidence of complications(P>0.05). According to the type of repair complications, the overall incidence of each repair complication was counted. The specific results are shown in the following table. The top three complications were food impaction(45.0%), abutment or abutment screw loosening (6.0%). And loss of adjacency(5.0%) (both P<0.05). Logistic regression analysis found that patients>50 years of age had a higher risk of complications than patients≤18 years of age; compared with patients with adequate bone mass, the risk of complications was increased in patients with insufficient bone mass, diabetes is independent risk factors for complications occur more frequently in diabetic patients. Gender and smoking had no significant effect on complications. Conclusion: Food caulking and abutment or abutment screw loosening are common complications, and the incidence of complications in the posterior region, advanced age, insufficient bone mass, and diabetes is relatively high.

Key words: dentition defect, implant restoration, complications, risk factors