2种材质桩核修复磨牙残冠的抗疲劳强度.pdf

·52· 口腔医学2013年1月第33卷第1期 2种材质桩核修复磨牙残冠的抗疲劳强度 索万奎 [摘要] 目的 比较2种桩核材料用于磨牙残冠桩核冠修复的抗疲劳强度。方法收集制备20个下颌第一磨牙残冠，分别 用纤维桩和铸造插销式分体桩进行桩核冠修复，测定其抗疲劳强度，并对两种修复方式的疲劳强度和折裂模式进行比较。结 果铸造插销式分体桩核冠用于磨牙残冠的修复可获得良好的抗疲劳强度，与纤维桩核冠修复相比较，差异具有统计学意义 (P0．05)。结论磨牙残冠选用铸造插销式分体桩核冠修复可以获得更好的力学性能，对于合并有夜磨牙、紧咬牙等习 惯的患者，应该采取降低牙尖斜度等方法来减小垂直及侧向殆力。 [关键词]磨牙；残冠；铸造桩核；纤维桩；抗疲劳强度 [中图分类号]R783．3 [文献标识码]A [文章编号]1003-9872(2013)01-0052-03 resistanceofresidualerowlisofmolarrestoredwithtwodifferentandcorematerials Fatigue post SUO OralProsthodonticand of 529000，Chi— Wankui．(Department Implantation，JiangmenMunicipalStomatologicalHospital，Jiangmen na) To the resistanceofresidualcrownsofmolarsrestoredwithtwo andcorematerials． Abstract：Objective comparefatigue post Methods20residualcrownsofmandibularfirstmolarswere intotwo andrestoredwithfiber collected，dividedgroupsrandomly post— and—corecrownsandcastmetallatch fission crowns．Theresistancetestwas thevaluesof type post—and—core fatigue implemented，and resistanceandmodesoffracturewererecordedand Residualcrownsofmolarsrestoredwithcastmetal fatigue compared．Results latch fission crownscould the withfiber obtain resistance with restored type post·-and—core goodfatigue compared group post-rand—core thediffeFencehadstatistical Restorationofmolar crownswithcastmetal crown，and residual significance(P0．05)．Conclusions latch fission crowncan bettermechanical thanrestorationwi