牙用DA9-4合金的支架及冠适合性的研究  

Study of crown and framework fitness of DA9-4 alloys

作　　者：刘长虹[1] 杨晓喻[1] 巢永烈[2] 李宁[3] 

机构地区：[1]广东省口腔医院,510280 [2]成都四川大学华西口腔医学院修复科 [3]四川大学金属材料学院

出　　处：《实用口腔医学杂志》2006年第4期453-456,共4页Journal of Practical Stomatology

基　　金：教育部博士点基金(20020610066)资助

摘　　要：目的:研究DA9-4合金支架及冠适合性,为该合金的临床应用奠定基础。方法:①支架适合性的测试:制作上颌651156缺失标准模型20个,常规制作蜡型。随机分成2组,每组10个,分别用DA9-4合金、Reminium2000合金铸造。用测量显微镜测量蜡型及铸造支架的距离差,计算铸造收缩量。②冠适合性测试:制作有机玻璃模具30件,硅橡胶印模材料翻制成超硬石膏模型,常规制作帽状冠的蜡型。试件随机分成3组,每组10件,用DA9-4合金、Reminium2000合金及VB钢铸造。粘结后的样本沿模具底座中部纵向剖开,体视显微镜测量试件10个部位粘结剂的厚度。结果:DA9-4合金与Reminium2000合金铸造支架收缩无显著性差异(P>0.05)。DA9-4合金冠修复体边缘间隙为(71.3±8.34)μm、肩台间隙为(53.4±4.83)μm、轴面间隙为(41.85±8.08)μm、面浮升量为(55.2±9.21)μm。结论:DA9-4合金具有良好的适合性,可满足临床要求。Objective. To investigate the crown and framework fitness of DAg-4 alloy. Methods：①20 maxillary dentue moulds of 6511156 were prepared and equally divided into 2 groups. Specimens were waved and casted with DA9-4 alloy and Reminium 2000 alloy respectively. The distance of wax patterns and the frameworks was measured with microscope. And then the shrinkage after cast was calculated. ②Thirty crown speciments in the shape of permolar were prepared and equally divided into 3 groups. Specimens cast with DA9-4 alloy, Reminium 2000 alloy and VB alloy respectively. Each speeiment was sandblasted with alumina and bonded with Hy-Bond Glassionomer. After bonding, the speeiments were embeded with self- coagulated plastic and cut longitudinaly at the middle. The thick- ness between the crown and the speciments at 10 spots was measured with stereomicroscope. Results： The cast shrinkage and the fitness between DA9-4 alloys and Reminium 2000 alloys were not significantly different （P 〉 0.05 ）. And the fitness values （μm） of the crown of DA9 - 4 alloy were ： the margin gap of the crown 71.3 ± 8.34, the shoulder gap 53.4 ± 4.83, the axial wall gap 41.85 ± 8.08, the ocelusal lift amount 55.2 ± 9.21. Conclusion： DA9 -4 alloy has good fitness and can meet the require of clinic.

关 键 词：适合性 DA9-4合金 冠修复 铸造支架 

分 类 号：R783.1[医药卫生—口腔医学]