临床口腔医学杂志2017，Vol.33Issue(6)：345-347,3.DOI:10.3969/j.issn.1003-1634.2017.06.009
三种牙色桩核系统全瓷冠修复后抗折强度研究
The study on fracture resistance of three kinds of teeth-color post-core systems with ceramic crows
摘要
Abstract
Objective:To compare the overall fracture resistance of three kinds of teeth-color post-core systems with ceramic crows.Methods:A total of 30 intact extracted maxillary central incisors were selected and divided into three groups with 10 incisors for each group.They were the group of color-masking Co-Cr post-cores(group A),ZrO2 post-cores(group B),and fiber-resin post-cores(group C)that were all remained 1.5 mm dentine shoulder edge.The fracture resistance of the three groups was measured a universal load-testing machine after ceramic crows repaired and the fracture modes were observed.Results:The fracture resistance of the three was 528.35±41.58 N,467.29±37.52 N and 372.48±51.34 N,respectively.There was significant difference in resistance among three groups(P<0.05).No significant difference was observed between group A with B(P>0.05).The finer fracture modes of the three were that group A and B were fractured or vertical ruptured at l/3 of the root tip which can't been repaired,and group C was fractured at the root cervical portion that can be repaired.Conclusion:It's suggested that less fiber-resin post-cores at the 1.5 mm dentine shoulder edge,the ZrO2 post-cores and color-masking Co-Cr post-cores were better.关键词
桩核/氧化锆/抗折强度Key words
Post-core/Zirconium oxide/Flexural strength分类
医药卫生引用本文复制引用
肖丹,黄丰,何建慧..三种牙色桩核系统全瓷冠修复后抗折强度研究[J].临床口腔医学杂志,2017,33(6):345-347,3.基金项目
珠海市科技计划项目(20161027E030049) （20161027E030049）
