结果68件金属烤瓷冠发生牙龈炎中修复体边缘不合符要求占70.59%，修复体外形不合符要求占10.29%，邻接关系不良占19.12%。

Results Among the 68 metal ceramic crowns, 70.59% were found to be fringe unqualification, 10.29% with contour unqualification, and 19.12% with ill interproximal contacts.

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结果：与修复有关的失败占6 1 .2 % ，其中主要是冠折。与牙周疾病有关的失败占2 9.8%。

Results:Of the teeth, 61.2% were prosthetic failures which were due primarily to crown fracture. 29.8% were periodontal failures.

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