用有限元法对上颌总义齿塑料基托不同网状加强的效果比较  

Comparison of the Effects of Different Strengthening Nets in Maxillary Complete Denture Resin Base by Finite Element Methods

作　　者：王雅北[1] 张少锋[1] 周敬行[1] 袁井圻[1] 刘京生[2] 曾余庚[2] 

机构地区：[1]第四军医大学口腔医学院修复科,西安710032 [2]西安电子科技大学401研究室,西安710032

出　　处：《生物医学工程学杂志》1994年第3期242-246,共5页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目

摘　　要：本研究采用三维有限元法,对上颌总义齿网状加强塑料基托的不同网架材料、不同加强部位、不同网孔形式,进行了应力分析比较。结果表明加强材料以钴铬合金网最强,不锈钢略次,铝合金网较次,尼龙网较差,未加强塑料基托最差。加强部位以5 5嵴顶唇颊缘包括腭部至5 5远中连线最好,7 7嵴顶唇颊缘至上腭后缘次之,3 3嵴顶唇缘至3 3远中连线较次,三者均优于仅加强于3 3、5 5、6 6嵴顶区呈弓形加强或弓形加后横杠式加强。网孔形式45°梭形孔与90°方形孔加强效果无差异。A 3-dimensional finite element method was employed to compare the effects of different net materials .different net hole forms and different sites in resin base. The results were as follows: 1) The ax+ in the midlayer of palatal control incisor of resin base was 7. 82 MPa without any strengthening nets,and that in the polish surface was 12. 22 MPa (While strengthening with cobalt-chromium alloy, the former rose to 40. 88 MPa,and the Latter decreased to 1. 17 MPa. The effects of stainless steel and aluminium alloy nets were slightly weaker than that of cobalt-chromium alloy net. Because of the almost same e-lastic modulus,nylon net was hardly efficient. However,this was contrary to reports of clinical trials. 2) Strengthening net to lip and cheek edge of crest of the ridge was more efficient than that to palatal edge? Extending net to a transversal line touching the distal-proximal surface of the second bicuspids,including the crest of the ridge area and palatal base anterior to the line,which was better than the lines of the second molars and cuspids,but all were more effective than that setted strenthening net only on the crest of the ridge of relevant area or the ridge with the transversal palatal bar. 3) No different effect was observed between the square holes and rhombus holes of net when the sites and materials were the same.

关 键 词：有限元法 上颌 总义齿 义齿 网状 

分 类 号：R783.6[医药卫生—口腔医学]