Abstract:

Objective    To observe the clinical effect of inlay and post core crown restoration in the treatment of residual crowns with different degrees of defects. Methods    Totally 153 cases of patients with residual crown of the first molar in the Department of Stomatology， Zhengzhou people's Hospital from January 2009 to December 2012 were selected. According to the type of dental defect， the inlay， fiber post resin core plus all ceramic crown， silver and  palladium alloy post and core crown were used to repair a total of 176 teeth. Follow up regularly every year， record the clinical check and evaluate the clinical effect. Results    Among the 176 teeth with residual crown of the first molar 153 were continuously followed up after 3 to 5 years，144 successful， nine failure，with a success rate of 94.1%. In the failure cases，there was one case of broken tooth in inlayⅡclass repair. Fiber post resin core was applied to repair 1 case of classⅡdefects，and 4 cases of type Ⅲdefects had neck of the tooth broken. In silver palladium alloy post and core there was 1 case of root fracture，1 case of apical inflammation and 1 case of crown falling off. According to the different types of defects，there was no significant difference among the 3 methods（P > 0.05）. Conclusion    Residual crown of the first molar （Ⅰor Ⅱ type of defects） can be repaired by inlay. For type Ⅲor Ⅳ defects post core crown can be selected according to the amount of residual tissue in the neck.

Key words:  , inlay；post core crown；residual crown of the first molar

摘要：

目的    观察不同程度缺损前磨牙残冠嵌体和桩核冠修复后的临床效果。方法    选择2009年1月至2012年12月在郑州人民医院口腔科就诊的前磨牙残冠患者153例，根据患牙缺损类型，分别采用嵌体和纤维桩树脂核加全瓷冠、银钯合金桩核冠修复患牙共计176颗。每年定期随访，记录临床检查状况，并对临床效果进行评价。结果    176颗前磨牙残冠修复后随访3 ~ 5年，随访到153颗，其中成功144颗，成功率为94.1%，失败9颗。失败病例中，嵌体修复Ⅱ类缺损牙体折断1颗，纤维桩树脂核修复Ⅱ类缺损牙体颈部折断1颗、Ⅲ类缺损4颗，银钯合金桩核修复Ⅳ类缺损根折1颗，根尖炎症1颗，冠脱落1颗。针对不同缺损类型，3种修复方式临床效果比较差异无统计学意义（P＞0.05）。结论    前磨牙残冠Ⅰ、Ⅱ类缺损可采用嵌体修复，Ⅲ、Ⅳ类缺损可根据牙颈部剩余组织量选择桩核冠修复。

关键词: 嵌体, 桩核冠, 前磨牙残冠