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Analysis of Stresses on the fracture of mandibular bone in the chidhood used the finite element method

儿童下颌骨骨折的有限元应力分析

基本信息

批准号：
09672131
负责人：
KATO Mikio
金额：
$ 2.11万
依托单位：
Osaka Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09672131/
关键词：
Trauma Mandibular bone Finite element method Fracture Stress 応力解析

项目摘要

There is increasingly the child injury by frequent occurrence of traffic accident and change of the environment. The injury affects not only tooth and tooth periodontium but also jaw bones. The panorama x-ray photograph recognizes well the fracture line of cervix, chin and diaphysis of the mandible. The purpose of the research is to research the damage of mandibular fracture in the injury using the finite element method. The mandible external form was measured using three-dimension measuring instrument, and the inside was photographed by x-ray computed tomograph. The three-dimensional finite element model of the mandible consists of 812 nodes and 636 elements. In the analysis, the structural analysis program made by Cosmos company was used. The following were input into the program : Node, element, restraint point and material physical coefficient. The load quantity was made to be 10kg-fold. The classification of research groups are the load for a deciduous incisor teeth, deciduous molar, first molar and angle of jaw division of the mandible. It seemed to obtain the result next. There was a resistant stress in the load from deciduous incisor tooth divisions of the mandible in both sides cervix of the mandible, from deciduous molar tooth divisions in the cervix in the opposite side of the mandible, from first molar divisions in first molar division in the load side and from an angle ofjaw division in angle of jaw division and cervix of the mandible. From the result of this research, the lesion may be different by the injury position of the mandible.

由于交通事故的频繁发生和环境的变化，儿童伤害事件日益增多。这种损伤不仅会影响牙齿和牙周组织，还会影响颌骨。全景X光照片很好地识别了颈椎、下巴和下颌骨骨干的骨折线。本研究的目的是用有限元方法研究下颌骨骨折在损伤中的损伤情况。用三维测量仪测量下颌骨的外部形态，用X线机拍摄下颌骨内部的照片。下颌骨三维有限元模型由812个节点和636个单元组成。在分析过程中，使用了Cosmos公司的结构分析程序。程序中输入了节点、单元、约束点和材料物理系数。负荷量为10 kg-1倍。研究组的分类为乳门牙负荷量、乳磨牙负荷量、第一磨牙负荷量和下颌角分割角。似乎下一步就有结果了。在载荷作用下，双侧下颌骨的乳门牙分叉、对侧下颌颈的乳磨牙分叉、第一磨牙分叉的第一磨牙分叉、下颌分颌与下颌颈的分颌角都产生了阻力应力。从研究结果看，下颌骨损伤部位不同，损伤部位可能不同。