The different shape of abutment margin has little influence on the marginal fit of crowns for ZOE and had important influence for ZP,and the chamfer margin is superior to shoulder margin for the marginal sealing of metal crowns.

• 金属全冠在使用氧化锌丁香酚水门汀时的边缘适合性受预备体龈缘形态的影响很小 ,而在使用磷酸锌水门汀时受到显著影响 ,凹形龈缘比肩台龈缘更有利于全冠的边缘封闭