下颌第一磨牙远中缺损牙体修复后的力学性能分析  

A 3-Dimension Finite Element Mechanical Analysis on DO Defect Restoration of the Mandibular First Molar

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作  者:李凌旻[1] 田力丽[2] 梁伟[1] 麦汉超[1] 

机构地区:[1]北京航空航天大学固体力学研究所,北京100083 [2]北京中日友好医院口腔科,北京100029

出  处:《中国生物医学工程学报》2006年第6期717-721,727,共6页Chinese Journal of Biomedical Engineering

基  金:国家自然科学基金资助项目(10102007);北航蓝天新星项目;北京市教委共建项目(XK100060522)

摘  要:本研究结合了三维激光扫描、逆向工程、三维有限元分析等技术,建立了下颌第一磨牙远中牙体缺损修复后的三维有限元模型,研究了其在不同加载方案、修复材料及修复洞型下的全场应力分析,并通过Mohr强度理论对修复体进行了校核。结果表明,临床上制备壁厚1mm的预备牙体进行充填修复在力学上是可行的;而对大面积缺损牙体的修复,桩核全冠修复并未显示出明显优势。In this article, the 3-dimensional laser scanning, reverse engineering, and 3-dimensional finite element analysis were used to build a 3D finite element model of mandibular first molar which was defected in the Distal- Occular type and then restored. The whole-field stresses under different loads, materials, and restorations were analyzed, Mohr strength theory was chosen to check the restorations. The result showed that it was practical to fabricate buccal and lingual with the wall of 1 mm for filling and full crown restoration; and for large structure defects, the post core and full crown restoration showed little superiority to filling and full crown restoration.

关 键 词:下颌第一磨牙 缺损牙体 逆向工程 三维有限元分析 Mohr强度理论 

分 类 号:Q66[生物学—生物物理学]

 

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