关键词: All-on-4, 无牙颌, 即刻负重, 边缘骨吸收, 口腔健康影响量表

Abstract:

Objective To evaluate the clinical outcomes of All-on-4 immediate loading implant restorations in edentulous patients. Methods A total of 30 All-on-4 patients with 144 implants who completed the treatment between November 2013 and August 2019 were included in this study. The 1-6 years outcome measurements, including survival rate of the implants and prostheses, marginal bone resorption of the implants, mechanical complications of the prostheses, patient satisfaction and quality of life scores were analyzed after implantation. Results Among the 30 patients, the implant survival rate and the restoration survival rate was 100%. There was no statistical difference in the comparison results of the marginal bone loss between axial and tilted implants in each time period. The bone loss stabilized within 2 or 3 years after implantation, and there was continuous bone loss during the follow-up period, but there was no significant change in bone resorption. One or more mechanical complications occurred in 13 restorations, accounting for 43.3%(13/30)of the total restorations, including temporary restorations fractured, abutment screws of restorations broken, retention screws loose, and restorations had one or more fractures. In terms of stability, psycho-social and chewing recovery, patient satisfaction score was relatively high;while for aesthetics, pain, and pronunciation effects, patient satisfaction score was relatively low. Conclusion The short-term clinical outcomes of All-on-4 immediate loading implant restoration technology in edentulous patients are reliable. However, more long-term clinical studies with high-quality large samples need to be conducted.

Key words: All-on-4, edentulous, immediate loading, marginal bone loss, oral health impact profile-14(OHIP-14)