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作者统计了人造冠３３８７件，固定桥１５８６件，其中戴用前失败的全冠为３９件，固定桥为３０件，导致全冠戴用前失败主要情况有边缘问题、咬合问题、邻接问题、全冠变形等，其中由于冠边缘问题造成失败的比率为４３．５９％，导致固定桥戴用前失败的主要情况有就位问题、桥体问题、铸造问题、电解问题等，其中因就位问题造成失败的比率为４３．３３％。根据失败情况作者对其主要原因加以分析，并提出了相应措施。
The author has counted 3387 artificial crowns and 1586 fixed bridges, of which 39 were worn before wear, 30 were used as fixed bridges, leading to failure of the crown before wearing. The main problems are edge problems, occlusion problems, abutment problems, Crown deformation, among which the failure rate due to the crown edge problem is 43.59%, resulting in failure of the fixed bridge before the main problems are in place, bridge problems, casting problems, electrolysis problems, in place The failure rate was 43.33%. According to the failure of the author to analyze the main reasons and put forward corresponding measures.