3种常用金属基底冠的边缘适合性评价  

Evaluation of marginal adaptation of three different copings of metal-ceramic crowns

作　　者：徐梅[1] 杨帆[2] 王仁飞[1] 

机构地区：[1]杭州口腔医院特需科．浙江杭州310014 [2]浙江中医药大学口腔医学院,浙江杭州310053

出　　处：《上海口腔医学》2012年第2期154-156,共3页Shanghai Journal of Stomatology

摘　　要：目的:评价高金合金、钴铬合金及镍铬合金3种不同金属基底冠的边缘适合性。方法:制作下颌第一磨牙全冠牙体制备标准金属代型1个,复制并灌注石膏模型后,制作高金合金、钴铬合金、镍铬合金基底冠各10个,依次将其就位于金属标准代型上。在体式显微镜下,对基底冠边缘与金属代型肩台之间的适合度进行观察,用CCD进行成像,并用专业图像测量软件测量边缘缝隙宽度。最后计算各组10个样本的平均值,采用SPSS11.5软件包对数据进行统计学处理。结果:高金合金、钴铬合金和镍铬合金的平均边缘缝隙宽度分别为(72.9±29.3)、(85.9±33.0)和(94.1±44.9)μm,3组之间差异显著;其中,高金合金的边缘缝隙宽度显著小于钴铬合金(P<0.01)和镍铬合金(P<0.001),而钴铬合金基底冠边缘缝隙宽度显著小于镍铬合金(P<0.05)。结论:3种瓷熔附金属基底冠的边缘适合度均在临床可接受范围,而高金合金基底冠的边缘适合度显著高于其他2种合金。PURPOSE：To evaluate the marginal adaptation of three different copings of metal ceramic crowns cast in high golden,cobalt-chrome and nickel-chrome alloy.METHODS：Thirty working dies were created from a single master die and used to fabricate thirty copings in each as the following groups： A（high golden alloy,n=10）,B（cobalt-chrome alloy,n=10） and C（nickel-chrome alloy,n=10）.All the metal copings were fabricated using the conventional lost wax casting technique.The restorations were seated on the master die,and high-resolution digital photographs were made of the marginal area on all four sides.The vertical marginal gap was then measured using a calibrated digital software program.One-way ANOVA and LSD tests were used to determine the differences using SPSS11.5 software package.RESULTS：The mean marginal gaps were group A：（72.9±29.3） μm;group B：（85.9±33.0） μm and group C：（94.1±44.9） μm.There was significant difference among three groups（PAB〈0.01,PAC〈0.001,PBC〈0.05）.CONCLUSIONS：The marginal gaps of three different metal copings are all clinical acceptable.The high golden copings resulted in smaller marginal gaps than either cobalt-chrome or nickel-chrome copings.

关 键 词：金属 基底冠 铸造 边缘适合性 

分 类 号：R783[医药卫生—口腔医学]