[摘要]目的调查不同分组条件下口腔修复体的返工率，探究影响口腔修复体返工率的因素，为生产厂降低返工率，提高生产效益提供帮助。方法收集口腔修复体生产记录15 980条。根据制作种类、模型分级等因素分组，比较修复体的返工率。采用SPSS 17.0数据统计软件，对数据进行统计分析。结果15 980条口腔修复体记录中，返工件1 366个，返工率为8.55%。根据制作类型分组，固定修复体的返工率为10.35%，活动修复体为6.10%；根据模型质量分组，固定组4级模型返工率最高，为12.77%；试戴组的返工率为4.19%，未试戴组为8.69%。经卡方检验差异有统计学意义(P<0.01)。结论口腔修复体的返工率与工作模型质量、制作种类、送件地区以及生产过程中有无试戴等因素有关。

    [关键词]牙修复体；义齿；工作模型；返工；返工率

    [中图分类号]R 783.2[文献标志码]A[doi]10.3969/j.issn.1673-5749.2012.04.006

    Analysis of dental prosthesis’rework ratesHuang Wenjing, Ma Chaoyi, Yu Na, Yue Li, Yu Haiyang.(Dept. of Dental Technology, West China School of Stomatology, Sichuan University, Chengdu 610041, China)

    [Abstract]ObjectiveTo investigate the rework rates of dental prosthesis under different conditions and explore the factors affecting rework rates, in order to reduce rework rates, and help improve production efficiency. Methods15 980 dental prosthesis records were collected and rework rates were compared under different group divided by production type, model classification, and so on. Data were analyzed by SPSS 17.0. ResultsThere were 1 366 rework prosthesis out of 15 980 records, the rework rate was 8.55%. Grouped by production type, rework rate of fixed denture was 10.35%, while removable denture was 6.10%. Grouped by model quality, the fourth model of fixed denture group had the highest rework rate as 12.77%. In addition, rework rate of try-in group was 4.19%, while non-try-in group was 8.69%. Chi-square tests showed P<0.01, there were significant statistical difference. ConclusionRework rates of dental prosthesis are related to model quality, production type, delivery areas, and try-in or not during production. ......