Development of the functional bad bearing device for hip joint

在TINS研究项目中，骨科植入物的新发展和新的制造技术在过去三年中一直紧密联系在一起，需要可制造性来将成功的生物力学和协作研究转化为成功的医疗产品，特别是针对珀斯病的产品。该装置的强度来自于Ti-6A1-4V金属合金，其承重功能通过特殊设计的连接获得了灵活性，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和满足产品设计和解剖要求方面遇到了困难。因此，目前一些临床试验装置是通过对该项目早期开发的装置进行重新设计而制成的，并对7个具有特殊设计装置的髋关节模型进行了实验分析，包括正常关节和Perths病关节。三维髋关节运动数据对DAIL-…能力的影响通过标准步态分析技术、视频分析和电子测角仪分析男女更多的生活，包括疏散和久坐不动的职业。运动数据的结果证明了该装置的有效性以及在有髋关节运动包容的情况下的排空和久坐占用的能力。此外，利用导电橡胶压力传感器系统研究了股骨头与髋臼的三维接触，以考察该装置的承载功能。最后，利用三维有限元方法对骨盆-装置-股骨近端联合模型的理论应力分布进行了研究，确定了模型在步态和日常生活中的应力分布、变形性和固定刚度等定性参数，成功地开展了大学和社会的合作，开发出了具有耐用性和临床适用性的新型骨科装置，一些新技术已经显示出功能性、经济性和可管理性。较少

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