Effect of Disinfecting Solutions for AIDS, ATL and HB Virus on Surface Conditions of Die Models

在牙科诊所，艾滋病、ATL和乙型肝炎等病毒感染的风险一直是一个重要问题。牙印浸泡在各种消毒溶液中已被证明是一种有效的病毒感染消毒程序。本研究比较了三种消毒溶液浸泡印模材料的效果。使用两种硅酮压印材料（toicon Injection，亲水性Exaflex Injection Type），一种琼脂压印材料（Dentoloid Pink）和一种海藻酸盐压印材料（Aroma Fine Dust Free Normal Set）。分别在2%戊二醛、10%聚维酮碘和70%乙醇中浸泡30分钟。对模具模型的表面粗糙度、表面硬度、尺寸变化及铸件的适应性进行了分析。主要结果如下：1。2. 2%戊二醛、10%聚维酮碘和70%乙醇浸泡对模具表面粗糙度无影响。2 .对于硅酮压模材料，浸泡10%聚维酮碘和70%乙醇后，模具模型表面硬度略有下降。由琼脂和海藻酸盐压模材料制成的模具模型在70%的乙醇中浸泡后往往会引起尺寸的变化。一类嵌体和二类嵌体的水泥层厚度都很薄。用印痕浸没消毒液制备的铸件精度可满足临床要求。在2%戊二醛溶液中浸泡模模30分钟非常适合硅胶模模材料制成的模型。

In dental offices, the risk of viral infections such as AIDS, ATL and hepatitis B has been an important problem. Immersion of dental impressions in various disinfecting solutions has been shown to be an effective disinfection procedure for viral infection. The effects of immersing impression materials in three disinfecting solutions were compared in this study.Two silicone impression materials(Tosicon Injection, Hydrophilic Exaflex Injection Type), one agar impression material(Dentoloid Pink)and one alginate impression material(Aroma Fine Dust Free Normal Set)were used. These impressions were immersed in 2% glutaraldehyde, 10% povidone iodine and 70% ethanol for 30 minutes respectively. The die models were assayed for its surface roughness, surface hardness, dimensional changes and adaptation of castings.The main results were as follows :1. The surface roughness of die models was not affected by immersing in 2% glutaraldehyde, 10% povidone iodine and 70% ethanol.2. In the case of silicone impression materials, the surface hardness of die models slightly decreased by immersing 10% povidone iodine and 70% ethanol.3. The dimentional changes of die models made from agar and alginate impression materials were often brought about by immersing in 70% ethanol.4. The thickness of the cement layers of Class I inlays and Class 2 inlays were excellently thin. The precision of the casting prepared by means of immersion of impressions in disinfecting solutions could satisfy the clinical requirements.5. Immersion of impressions in 2% glutaraldehyde solution for 30 minutes was found highly suitable for the models made from silicone impression materials.