关键词: 金属嵌体, 牙体缺损, 后牙

Abstract:

Objective    To compare and analyze the retention-loss ratio of two different metal inlays in the short-term. Methods    Totally 1039 patients were chosen in the study，who had metal inlay restorations made for 1104 posterior teeth with vital pulps by five dentists. Six to 24 months later，retention-loss ratio was calculated and analyzed through clinical follow-up observation. Results    Be it nickel chromium alloy or gold palladium alloy inlay，classⅡhole retention-loss rate was higher than classⅠ，showing statistically significant difference（P＜0.05）；loss rate of the two kinds of material in classⅠand classⅡhole had no statistically significant differences （P＞0.05）. Causes of retention-loss of metal inlay mainly were that clinical preparation for inlay was not standard. Conclusion    In the short-term，as for mental inlays of posterior teeth with vital pulps，classⅡhole retention-loss rate is higher than classⅠ. Metal material choice and retention-loss rate may have no relationship. The loss rate is closely related to the unstandard preparation. 

Key words: metal inlay, tooth defect, posterior teeth