钴铬合金烤瓷髓腔固位冠不同厚度内冠适合性的比较研究  

Influence of inner crown thickness on fitness of porcelain fused to Co-Cr alloy endocrown

作　　者：李学盛 王潇宇[1] 郭靖[1] 赵彤[2] 李鸿波[1] 

机构地区：[1]解放军总医院口腔医学中心,硕士生北京100853 [2]中国科学院大学数学科学学院,副教授北京100049

出　　处：《口腔颌面修复学杂志》2016年第2期65-68,共4页Chinese Journal of Prosthodontics

基　　金：国家自然科学基金(项目编号:30801307);北京市科技计划项目(项目编号:Z141100002114031)

摘　　要：目的:探讨钴铬合金烤瓷髓腔固位冠内冠厚度对适合性的影响。方法:以磨牙平均解剖数据为基础,建立材料学研究简化模型,制作钴铬合金烤瓷髓腔固位冠内冠,厚度分别为0.3mm、0.5mm、0.8mm、1.0mm,每组8个试件,共32个。采用硅橡胶印模复制法,在体视显微镜下测量边缘间隙、轴角间隙、轴壁1间隙、轴壁2间隙、底部间隙处硅橡胶印模的厚度值,对不同厚度内冠的适合性进行方差分析及多重LSD比较。结果:冠边缘处间隙薄膜厚度值为62.14-68.27μm,轴角部位为61.50-69.33μm,轴壁为31.31-44.25μm,髓腔固位形底部为56.02-67.96μm。经方差分析,在各测量位点,不同厚度的内冠之间适合性无显著性差异。结论:4种不同厚度内冠的钴铬合金烤瓷髓腔固位冠,其内部和边缘适合性均达到临床要求。在牙合龈距离不足的情况下采用0.3mm厚度的内冠对钴铬合金烤瓷髓腔固位冠边缘适合性无明显影响。Objective： To investigate the influence of the thickness of inner crown on the fitness of porcelain fused to cobalt-chromium（Co-Cr） alloy endocrown. Methods： Thirty-two inner crowns were fabricated from Co-Cr alloy, and designated into four equal groups according to their thickness in 0.3, 0.5, 0.8, 1.0mm. The silicone replica method was used to evaluate the adaption. Using a stereoscopic microscope, the thicknesses of the silicone impression were measured at 5 different locations of each sample. The ANOVA and multi-LSD comparing were used in statistically analysis. Results： The mean thickness of the impression material were 62.14-68.27μm at the marginal point, and 61.50-69.33μm at the corner of the occlusal surface and the axial surface, 31.31-44.25μm at the wall of the chamber, 56.02-67.96μm at the bottom of the chamber. No significant difference was found among the fitness of the four groups. Conclusion： The fitness of inner crowns of different thickness can meet the clinical requirement of porcelain fused to Co-Cr alloy endocrowns. As fitness is concerned, inner crown of 0.3mm thickness was recommended in endocrown design for tooth defect with low occlusalgingival distance.

关 键 词：钴铬合金 髓腔固位冠 适合性 内冠 

分 类 号：R783[医药卫生—口腔医学]