不同清洁剂对赝复体硅橡胶色稳定性的影响

Effects of cleaners on the color stability of prosthesis silicone rubbers

目的了解不同清洁剂对赝复体硅橡胶色稳定性的影响，为临床选择适宜的赝复体清洁剂提供实验依据。方法制作直径12mm、高10mm的A-2000和ZY-1肤色硅橡胶试件（简称A和z）各30个，编号后按随机数字表分为6组，分别采用清洁剂异丙醇（I）、3种义齿清洁剂（P：Polident；S：Steredent：C：Cleansofl）和蒸馏水（D）浸泡（I、P、S、C、D分别为每次浸泡1、15、10、3和10min），蒸馏水冲洗1rain，吹干，重复365次；空白对照组不进行任何处理，避光保存。在浸泡前后采用CR-321色度仪测量试件的色度值，计算色差值△E。结果各种清洁剂浸泡前后赝复体硅橡胶的色差值不同，I组色差值（A：2．15，Z：2．00）显著高于其他组（P〈0．05）；义齿清洁剂P（A：0．36，Z：0．36）、c（A：0．42，Z：O．37）和s（A：0．33，z：0．38）与D（A：0．22，Z：0．23）色差值的差异无统计学意义（P〉0．05）。结论异丙醇对赝复体硅橡胶色稳定性影响明显，应尽量避免使用；义齿清洁剂与蒸馏水对赝复体硅橡胶色稳定性影响不明显。

Objective To evaluate the effect of different cleaners on the color stability of two silicone rubbers used for maxillofacial prosthesis, and to provide recommendations for clinical use. Methods Thirty skin-color columniform specimens （12 mm diameter, 10 mm height） of two silicone rubber（ A： A- 2000; Z： ZY-1 ） were prepared, randomly divided into 6 groups according to the table of random number, and eleaned with the following solutions： isopropyl alcohol （I）, three kinds of denture cleaners （P： Polident, S： Steradent, C： Cleansoft） and distilled water （D）, simulating the total immersion time of I year （ 1 , 15, 10, 3 and 10 rain each time respectively）. Control group was kept in dark place without treatment. The L ＊ , a ＊ , b ＊ value were tested before and after irmnersion. Then color difference value was calculated. Results Color differences were different among groups. Color difference in group I （ A ： 2. 15, Z ： 2. 00） were significantly greater than that in any other group. There were no significant differences between groups using denture cleaner P（A： 0.36, Z： 0.36）,C（A： 0.42, Z： 0.37） and S（A： 0.33, Z： 0.38）, and group D （ A： 0.22, Z ： 0. 23 ）. Conclusions Isopropyl alcohol causes the most severe fading, and denture cleaners and distilled water cause obscure fading.