【摘要】 目的:观察采用2种边缘形式的后牙烤瓷熔附金属全冠边缘适合性和对牙龈健康的影响。方法:对668颗后牙,分别采用2种边缘形式的后牙烤瓷熔附金属全冠(单冠或桥的基牙)在修复2年后进行复查,检测其边缘适合性及牙龈指数(GI)和牙周探诊深度(PD),用统计学方法分析修复体边缘形式与牙龈病变间的关系。结果:采用羽状边缘360°金属脚边的PFM边缘适合性明显优于凹面肩台型边缘PFM,凹面肩台型边缘的PFM的牙龈病变发生率,明显高于羽状边缘360°金属脚边的PFM,而边缘适合性差者较适合性好者牙龈病变发生率显著增高。结论:后牙PFM的边缘采用羽状边缘360°金属脚边是一种好的选择。更多还原

【Abstract】 Objective: To evaluate marginal adaptation and gingival health on two kinds of marginal forms of porcelain fused to metal(PFM)complete crowns. Methods: 668 cases of none-precious metal porcelain crowns with 2 different margin designs were included in this study. The restorations were single crowns or the fixed bridge. The patients were followed up 2 years after crown placement. The marginal adaptation, GI, and PD were observed. The relationship between marginal designs and gingivitis was statistically analyzed. Results: Marginal adaptation was much better in crowns with 360°metal collar and knife edge than in crowns with chamfer margin. The rate of gingivitis in crowns with ceramic margins was higher than crowns with metal collar margins. There was a close relationship between marginal adaptation and gingivitis. Conclusion: In Metal collar margin is a good choice for posterior teeth’ s PFM crowns.更多还原