两种材料桩钉对牙根应力分布影响的三维光弹应力分析  

Three-dimensional Photoelastic Stress Analysis of Roots Restored with FRC Posts and Ni-Cr Alloy Posts

作　　者：张文云[1] 施长溪[2] 陈吉华[2] 贾安琦[1] 李南[1] 

机构地区：[1]成都军区昆明总医院口腔科,云南昆明650032 [2]第四军医大学口腔医学院

出　　处：《口腔医学研究》2003年第2期122-124,共3页Journal of Oral Science Research

摘　　要：目的 :研究不同弹性模量材料桩钉对牙根应力分布的影响。方法 :根据加载方式和桩钉材料将模型分为四组 ,用三维光弹应力分析法分析FRC桩钉和金属桩钉在两种加载 (垂直和斜向 )方式下牙根内应力分布情况。结果 :桩钉材料对牙根应力分布有明显的影响 ,弹性模量高的合金桩钉组在两种加载方式下在桩钉末端牙体组织内均有较大的应力集中 ,而模量较低的FRC桩钉组牙根应力分布比较均匀。结论 :不同弹性模量材料桩钉对牙根应力分布有明显的影响 ,弹性模量与牙体组织接近的FRC桩钉有利于保护牙根防止折裂。Objective:The effect of two modulus elasticity material posts on root stress distribution was analyzed by using three-dimensional photoelastic analysis.Methods:The photoelastic models were divided into four groups according to material and loading.The roots stress distribution which restored with FRC posts and Ni-Cr alloy posts was analyzed by three-dimensional photoelastic analysis.Results:The material of posts influenced the root stress distribution significantly.The greater stress concentration was found at apex of Ni-Cr alloy posts with high modulus, the stress was evenly in FRC posts groups.Conclusions:The modulus of posts material influenced the root stress distribution significantly.The FRC posts which modulus was closed to teeth could protect roots from fracture.

关 键 词：桩钉材料 纤维增强树脂复合材料 金属桩钉 牙根应力 三维光弹应力分析法 

分 类 号：R783.3[医药卫生—口腔医学]