Development of the functional bad bearing device for hip joint

髋关节功能性不良轴承装置的研制

基本信息

批准号：
12794021
负责人：
HARA Toshiaki
金额：
$ 28.48万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for University and Society Collaboration
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12794021/
关键词：
device Perthes disease load bearing function Orthopaedics hip joint biomechanics stress analysis optimum design

项目摘要

In tins research project, new developments in orthopaedic implants and new manufacturing technologies have been closely tied for the past three years Manufacturability has been required to transform successful biomechanical and collaborated research into a successful medical product especially for Perthes disease. The device obtained its strength from Ti-6A1-4V metal alloy, its load bearing function with flexibility through special designed linkage, and its fixation through a pelvic surface though this collaboration has experienced difficulties in achieving functional effectiveness and fulfilling product design and anatomic requirements. As a results, some devices for clinical trial are currently made by the applications of redesign to earlier developed devices for this project.Experimental analysis was carried out on 7 hip models with the special designed devive, including normal joints and joints affected with Perthes diseases. Three-dimensional hip motion data on the ability of dail … More y life including evacuation and sedentary occupation for female and male was analyzed by standard gait analysis techniques, using video analysis and electrogoniometers. The results from the motion data proved the efficacy of the device and the ability of evacuation and sedentary occupation although there is the motion containment of the hip.In addition, three-dimensional femoral head contact with the acetabulum was studied to investigate the load bearing function of the device using electric conductive rubber pressure sensor systems. It was found that there was significant difference in the contact stress between joint models with/without the device.Finally we studied the theoretical stress distribution in the pelvis-device-proximal femur united model by means of a three-dimensional finite element method to determine the qualitative parameters on stress distribution in the model during gait and daily life, the deformability, and the fixational rigidity.We conclude that the university and society collaboration has been successfully carried out to develop the new orthopaedic device which has the endurability and clinical applicability and that some new technologies have demonstrated functionality, cost effectiveness, and regulatory approvability. Less

在锡的研究项目中，过去三年来，骨科植入物的新发展和新的制造技术紧密相连，需要将成功的生物力学和协作研究转化为成功的医疗产品，特别是针对佩尔特斯病的设备。 Ti-6A1-4V 金属合金，通过特殊设计的连杆实现具有灵活性的承载功能，并通过骨盆表面进行固定，尽管这种合作在实现功能有效性以及实现产品设计和解剖学方面遇到了困难因此，目前一些用于临床试验的装置是在该项目早期开发的装置的基础上进行重新设计的。使用专门设计的装置对7个髋关节模型进行了实验分析，包括正常关节和受Perthes影响的关节。使用视频分析和电测角仪，通过标准步态分析技术对有关女性和男性日常生活能力（包括疏散和久坐职业）的三维髋关节运动数据进行了分析。尽管存在髋部运动限制，但该装置的功效以及疏散和久坐职业的能力。此外，还研究了三维股骨头与髋臼的接触，以研究使用导电橡胶的装置的承载功能结果发现，有/无装置的关节模型之间的接触应力存在显着差异。最后，我们利用骨盆-装置-股骨近端联合模型研究了理论应力分布。三维有限元方法确定了模型在步态和日常生活中的应力分布、变形能力和固定刚度的定性参数。我们得出的结论是，大学和社会的合作已经成功地开发了新型骨科装置其具有耐久性和临床适用性，并且一些新技术已被证明具有功能性、成本效益和监管批准性。