不同消毒处理对藻酸钾印模尺寸精度的影响

目的：评价比较藻酸盐印模在分别接受体积分数与２％戊二醛、５０ｇ／Ｌ艾力克、纯水的不同方式、不同时间的处理后尺寸精度的变化。方法：以同一母模制取６０个印膜，２０个为一组分别接受体积分数为２％戊二醛，５０ｇ／Ｌ艾力克，纯水的处理。在每个处理组中的２０个印模中，４个印模被浸泡１０ｍｉｎ，４个被浸泡２０ｍｉｎ，４个被浸泡３０ｍｉｎ，４个被喷涂，４个不做处理作为对照组，处理完后立即以人造石灌模，比较各组石膏

The effect of different disinfectants upon diminsimal change of the alginate impressions

bjective:To study the effects of 2% glutaraldehyde,5% Eric or pure water on the impression accuracy.Method:Sixty impressions were divided into three groups and were treated with 2% glutaraldehyde,5% Eric,pure water respectively.In each group every 4 impressions were immersed into the 3 kinds of liquid for 10,20 or 30 min,four were sprayed,four were left untreated as control,respectively.The impressions were then casted with die stone after treatment.Measurements on the casts were compared.Results:(1)The immersion treatment in all 3 liquids for 10,20 or 30 min generated positive dimensional expansion (P<0.05).(2)Spraying treatment did not cause dimensional change( P> 0.05).Conclusions:[WT9.,8.5BZ](1)Spraying technique does not significantly affect the dimensional accuracy of impressions;(2)immersion treatment can cause detectable expansion of the impressions with time passes.