不同种类的熔模材料对铸造冠边缘适合性影响的实验研究  

The effect of different pattern materials on the marginal adaptation of casting full-crown

作　　者：侯晓冲[1] 王忠义[1] 王宝成[1] 高勃[1] 叶晓兰[1] 

机构地区：[1]西安第四军医大学口腔医学院修复科,710032

出　　处：《实用口腔医学杂志》2005年第1期118-120,共3页Journal of Practical Stomatology

摘　　要：目的 :观察磷酸盐包埋材料内部膨胀受不同种类熔模材料软化温度的作用和对铸造冠边缘适合性的影响。方法 :制作模拟后牙全冠外形的标准帽状试件及圆管 ,于试件上制作 3 0个熔模 ,并随机分为 3组 ,每组 10个熔模。每组分别采用不同的熔模材料制作熔模。第 1组采用软质嵌体蜡制作 ,第 2组采用硬质嵌体蜡制作 ,第3组采用自凝复合树脂制作 ,3组均按照Dentaurum包埋材料的使用说明进行有圈包埋 ,采用与Dentaurum包埋材料配套的DentaurumNiCrMo合金进行铸造。铸造冠在原标准帽状试件上试合 ,在扫描电镜下测量铸件的边缘浮出量。结果 :前 2组间的边缘浮出量无显著性差异 (P >0 .0 5 )。第 3组与前 2组间的边缘浮出量有显著性差异(P <0 .0 5 )。结论 :不同熔模材料的软化温度对铸造冠边缘适合性有影响。熔模材料软化温度越高 ,铸造冠边缘浮出量越明显。Objective:To study the effects of pattern materials on th e marginal adaptation of the casting metal full-crown. Methods:St andard cast specimens and round capsules simulating post tooth crowns were made. 3 group patterns were prepared on the cast specimens. Soften inlay wax with sof tening temperature of 41 ℃ was used in group 1, harden inlay wax with softening temperature of 65 ℃ in group 2,autopolymerizing acrylic resin with softening t emperature of 75 ℃ in group 3.There were 10 patterns in each group. The embendi ng material was phosphate and the dental casting alloy was NiCrMo.The marginal o pening of the metal full-crown was measured with SEM.Results:Th e marginal opening (μm) in group 1,2 and 3 was 40.267±6.329, 45.400 ±6.621 and 91.633±10.227(group 1 vs group 2 P>0.05,group 1 or group 2 vs group 3 P<0.05).Conclusion:Pattern material may affect the marginal opening of full-crown casting.Autopolymerizing acrylic resin may result in larg er marginal opening of full-crown casting.

关 键 词：熔模材料 包埋 边缘适合性 边缘浮出量 

分 类 号：R783.2[医药卫生—口腔医学]