塑料牙是口腔矫形修复中常用的材料,应用面广、数量多。由于没有统一的归口管理,各厂生产假牙的型号、尺寸、色号都较乱,不同的厂生产的大小型态也不一样,如原上海齿科材料厂生产的22型塑料牙中切长牙长10.5毫米,山西长治齿科材料厂生产的22型中切牙长为12毫米,其他如23、24、25、26,18、20等型号大小都不一致,型号编码也没有规律和意义,颜色方面同样存在同一个色号。1975年下达制订塑料牙卫生部部标准任务,在上海医疗器械研究所的技术指导下,听取全国各地约85个医疗单位的意见,在现有的基础上作了进一步的改进,于一九七七年由卫生部召开的有 Plastic dental orthodontics repair materials commonly used in a wide range of applications, the number of more. Because there is no unified centralized management, the factory production of dentures model, size, color number are more chaos, different plant size and shape are not the same, such as the original Shanghai Dental Materials Factory production of 22 plastic teeth cut long Dental 10.5 mm, Shanxi Changzhi Dental Materials Factory production of 22-type incisors 12 mm long, the other such as 23,24,25,26,18,20 and other models are inconsistent size, type code nor rules and significance, The same color number of the same color. In 1975, it formulated the standard task of formulating the standard of plastic dental health department. Under the technical guidance of Shanghai Institute of Medical Instrument, it listened to the opinions of about 85 medical units across the country and made further improvements on the existing basis. In 1979, Seven years by the Ministry of Health held