上颌第一恒磨牙不同桩核材料对牙本质应力影响的三维有限元分析  

Three-dimensional finite element stress analyses of post-crown restored maxillary first molar with different materials

作　　者：李剑[1] 吴凤鸣[2] 傅晓峰[1] 浦广益 袁秀祥 

机构地区：[1]无锡市人民医院口腔科,无锡214000 [2]南京医科大学口腔医学研究所南京医科大学口腔学院修复科,南京210029 [3]江南大学机械学院,无锡214000 [4]无锡市第七人民医院,无锡214000

出　　处：《口腔医学》2008年第10期522-524,共3页Stomatology

摘　　要：目的用三维有限元方法分析上颌第一恒磨牙不同材料桩核对牙本质应力的影响。方法利用已建立的上颌第一恒磨牙及桩核的三维实体和三维有限元模型;在ANSYS10.0中分别对不同材质的桩核冠作同样的加载,得到牙本质内部VonMises应力云图及峰值应力数据。结果弹性模量接近牙本质的桩核可使桩尖端牙本质应力集中显著减小。结论选用弹性模量接近牙本质的桩核保护剩余的牙根组织。Objective To study the stress distribution discipline of root of the post-crown restored maxillary first molar with three kinds of materials. Methods The stress distribution of the diflierent post-core-crowns was studied and analyzed by three-dimensional finite element under the same loads. Results In the same composition of forces, the stress for dentin of the polyihene fiber reinforced composite post-corecrown was the smallest. Conclusion The materials with elastic modulus similar to that of dentin, such as polythene fiber reinforced composite, may be suitable for post restoration.

关 键 词：上颌第一磨牙 桩核 材料 三维有限元模型 

分 类 号：R783.4[医药卫生—口腔医学]