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在临床上治疗牙列缺损,尤其是后牙游离端缺失时,有时会考虑使用天然牙与种植体联合支持式固定义齿修复方案.虽然这是一种有争议的方案,有很多研究报道了它的临床并发症和不足之处;但同时也有很多研究表明其具有很好的临床效果.本文从生物力学研究和临床应用两个方面对有关天然牙与种植体联合支持式固定义齿修复的研究现状进行综述.  相似文献   

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1 Background

Computer‐guided systems were developed to facilitate implant placement at optimal positions in relation to the future prosthesis. However, the time, cost and, technique sensitivity involved with computer‐guided surgery impedes its routine practice. The aim of this study is to evaluate survival rates and complications associated with computer‐guided versus conventional implant placement in implant‐retained hybrid prostheses. Furthermore, long‐term economic efficiency of this approach was assessed.

2 Methods

Patients were stratified according to implant placement protocol into a test group, using computer‐guided placement, and a control group, using traditional placement. Calibrated radiographs were used to measure bone loss around implants. Furthermore, the costs of the initial treatment and prosthetic complications, if any, were standardized and analyzed.

3 Results

Forty‐five patients (149 implants in the test group and 111 implants in the control group) with a minimum follow‐up of 5 years, and a mean follow‐up of 9.6 years, were included in the study. While no significant difference was found between both groups in terms of biologic and technical complications, lower incidence of implant loss was observed in the test group (< 0.001). A statistically significant difference in favor of the non‐guided implant placement group was found for the initial cost (< 0.05) but not for the prosthetic complications and total cost (> 0.05).

4 Conclusions

Computer‐guided implant placement for an implant‐supported hybrid prosthesis is a valid, reliable alternative to the traditional approach for implant placement and immediate loading. Computer‐guided implant placement showed higher implant survival rates and comparable long‐term cost to non‐guided implant placement.  相似文献   

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