中国医科大学学报2016，Vol.45Issue(7)：596-600,5.DOI:10.12007/j.issn.0258-4646.2016.07.005
不同材质桩核修复对薄弱残根抗折强度的影响
Effects of Different Materials Post-core Restoration on Fracture Resistance of Weakened Roots
摘要
Abstract
Objective To investigate the influence of different kinds of post⁃core materials on fracture resistant ability of different walls during weakened root restoration. Methods Forty⁃eight human single root mandibular first premolars were randomly assigned to two groups(groupⅠwas repaired with quartz⁃fiber post⁃core and mental crown ,and groupⅡwas repaired with Co⁃Cr cast metal post⁃core and mental crown). Each main group was then divided into four subgroups of 6 specimens. All samples were tested on the universal test machine. We observed the fracture load and the fracture mode of the specimens. Results Cr⁃Co ally post⁃core group exhibited significantly higher resistance to fracture than quartz fiber post⁃core in the same number weakened root walls(P<0.05). With the increase in the quantity of weakened root walls ,the fracture resistance was significant decreased in the same post⁃core material(P<0.05). The possibility of repairable fractures in groupⅠwas significantly higher than that in groupⅡ(P<0.05). Conclusion Cr⁃Co alloy post⁃core can bear a higher bite ,but quartz fiber post⁃core has the most favorable fracture modes.关键词
薄弱残根/桩核材质/抗折强度/弹性模量/折裂模式Key words
weakened root/post and core material/fracture resistance/elastic modulus/failure mode分类
医药卫生引用本文复制引用
许艳艳,屈直..不同材质桩核修复对薄弱残根抗折强度的影响[J].中国医科大学学报,2016,45(7):596-600,5.基金项目
辽宁省自然科学基金（2013022012）；辽宁医学院校长基金-全民口腔研究生科研创新基金 （）
