机混硅橡胶与藻酸盐印模材料在口腔修复印模制取中的应用研究

Application Research on Machine Mixed Silicone Rubber and Alginate for the Oral Cavity Repair Impression

目的比较机混硅橡胶和藻酸盐印模材料在口腔固定修复印模制取中的应用。方法连续纳入2010年6月至2011年1月于四川大学华西口腔医院种植科就诊需行前牙烤瓷冠修复的患者,随机分为机混硅橡胶组和藻酸盐组。常规备牙排龈后,分别以上述两种材料制取印模。评价所制印模的气泡产生情况,并评价其等级。统计分析采用SPSS 15.0软件。结果共纳入50例患者,每组各25例。与藻酸盐组比较,机混硅橡胶组印模等级较高Z=–3.890,P<0.001),且气泡数更少(t=4.196,P<0.001)。结论与藻酸盐相比,应用机混硅橡胶制取的口腔固定修复印模的精确度更高、龈缘清晰,利于后期义齿的制作。

Objective To compare the application of impression made with machine mixed silicone rubber and al- ginate on fixed partial denture. Methods The fixed prosthesis oral cavity repair patients were continuously enrolled who visited the department of Oramaxillofacial Surgery of West China Stomatology Hospital, Sichuan University form June 2010 to January 2011. They were randomly divided into two groups （machine mixed silicone rubber group and alginate group）. After conventional row for teeth, both materials were used to make impression. Then, bubble condition and its grade caused by dental impression were evaluated. Statistical analysis has performed using SPSS 15.0. Results A total of 50 fixed prosthesis oral cavity repair patients were included, of which, 25 were in the machine mixed silicone rubber group and 25 in the alginate group. Compared with alginate, the impression made with machine mixed silicone rubber was higher of grade （Z= -3.890, P〈0.001）, smoother （t=4.196, P〈0.001）, higher precision than the alginate group. Conclu- sion Compared with alginate, the mixed silicone rubber for making oral fixed prosthesis machine impression is higher in precision, clearer in the gum line, which is good for late production of denture.