全冠修复体边缘密合度临床测定方法研究

目的探讨千分尺测量法和薄复写纸测量法测量全冠边缘密合度的临床可行性。方法在10颗离体牙上模拟临床完成镍铬合金烤瓷全冠的修复，每颗离体牙肩台处选择6个测量位点，分别以千分尺测量法、薄复写纸测量法和扫描电镜测量法测量，得出数据并进行统计学分析。结果千分尺测量法有5个数据与扫描电镜测量法有差异，薄复写纸测量法有6个数据与扫描电镜测量法有差异，差异均无统计学意义（t=0．392，0．543，均P〉0．05）。结论千分尺测量法和薄复写纸测量法作为全冠边缘密合度的简易量化测量方法，能满足临床要求。

The study on clinical method of measurement in the marginal fitness of crown

Objective To study the clinical feasibility of micrometer method and thin carbon paper method in the marginal fitness of crown.Methods 10 ex vivo teeth were selected to be restored by Nickel-Chromium alloy PFM crown.Selected 6 measurement sites on shoulder in each ex vivo teeth.Micrometer method,thin carben paper method and SEM method were used to measure.and the data were analyzed by SPSS 13.0.Results 5 data in micrometer method and 6 data in thin carbon paper method were different to SEM method.The disparity was not statistically significant(t=0.392 and t=0.543).Conclusion Micrometer method and thin carbon paper method were two facility quantization measurements to the marginal fitness of crown.They had satisfied to effect in clinic.