Abstract: Objective: To analyze the clinical efficacy of implant-supported overdentures with different types of attachments. Methods: Forty-six patients treated by implant-supported overdentures with different types of attachments were included and examined. Index for peri-implant tissue conditions and prosthetic complications were examined and recorded. The clinical efficacy was evaluated by the rate of implant retention, incidence of complications, and patients' satisfaction. Results: After an average follow-up of (64±36) months, the survival rate of implants was 93.44%, the marginal bone loss was (1.32±1.13) mm. There was no statistical difference among the different types of attachments groups regarding the peri-implant marginal bone loss and bleeding on probing (P＞0.05). There were statistically significant differences in mucosal proliferation index, plaque index, and probing depth (P＜0.05). Gingival hyperplasia was more common in the bar group. The main mechanical complications of implant-supported overdentures were retaining cap loosening and replacement, abutment wear, and screw loosening. Conclusion: The implant-supported overdentures with different types of attachments have successful clinical efficacy and patients' satisfaction. The quality of life of the patients was improved by overdenture.

Key words: edentulous jaw, implant overdenture, clinical efficacy