Carlos Diaz Novo, Walter Mar Haller, Emiliano Alvarez Ruiz, Micaela González Castillo, Manuel Bárbaro Cuadra, Mateo Olivera García
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The prosthesis was manufactured using thermofusion printing with a biocompatible thermoplastic elastomer material. Functional validation included walking, running, and the Timed Up and Go test using motion analysis technologies. Finite element analysis demonstrated the structural integrity and safety of the TMT prosthesis during propulsion. The manufacturing process resulted in an adjustable and cost-effective prosthesis. Functional validation revealed improvements in gait quality, symmetry, and spatiotemporal parameters with the prosthesis. Vertical ground reaction forces during walking resembled the normal range, and running performance showed increased symmetry and propulsion velocity. The Timed Up and Go test showed that prostheses reduce time and improve efficiency. The development and functional validation of the 3D-printed TMT prosthesis offer a promising solution for individuals with TMT disarticulation. This approach addresses the need for assistive technologies in low-income countries with limited access to prostheses. Advanced technologies and a patient-centred approach contribute to improving mobility, gait patterns, and overall quality of life for individuals with partial foot amputations. 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引用次数: 0
摘要
辅助技术在向残疾人提供包括假肢在内的辅助产品方面发挥着至关重要的作用。跗跖骨(TMT)脱臼是一种部分足截肢,与复杂的步态障碍有关。然而,关于TMT假肢对步态功能影响的研究有限。本研究旨在通过有限元分析和人体运动实验室研究来开发和功能验证3d打印TMT假体。一名65岁的TMT截肢患者参与。通过三维扫描获得截肢足和健康足的数字模型。假体设计使用Fusion 360软件创建。有限元分析验证了假体设计。该假体是用生物相容性热塑性弹性体材料热熔打印制造的。功能验证包括步行、跑步和使用运动分析技术的Timed Up and Go测试。有限元分析证明了TMT假体在推进过程中的结构完整性和安全性。制造过程产生了一种可调节且具有成本效益的假肢。功能验证显示步态质量、对称性和时空参数与假体的改善。行走时的垂直地面反作用力与正常范围相似,跑步表现出对称性和推进速度的增加。Timed Up and Go测试表明,假体减少了时间,提高了效率。3d打印TMT假体的开发和功能验证为TMT脱臼患者提供了一个有希望的解决方案。这种方法解决了获得假肢有限的低收入国家对辅助技术的需求。先进的技术和以患者为中心的方法有助于改善部分足部截肢患者的活动能力、步态模式和整体生活质量。未来的研究将集中在探索更多的参数和开发新的假肢,以进一步提高步态的改善。
Development and functional validation of tarsometatarsal prosthesis
Assistive Technology (AT) plays a crucial role in providing aid products, including prostheses to persons with disabilities. Tarsometatarsal (TMT) disarticulation, a type of partial foot amputation, is associated with complex gait disorders. However, there is limited research on the functional impact of TMT prostheses on gait. This study aims to develop and functionally validate a 3D-printed TMT prosthesis using finite element analysis and human motion laboratory studies. A 65-year-old patient with TMT amputation participated. Digital models of the amputated and healthy feet were obtained through 3D scanning. The prosthesis design was created using Fusion 360 software. Finite element analysis validated the prosthesis design. The prosthesis was manufactured using thermofusion printing with a biocompatible thermoplastic elastomer material. Functional validation included walking, running, and the Timed Up and Go test using motion analysis technologies. Finite element analysis demonstrated the structural integrity and safety of the TMT prosthesis during propulsion. The manufacturing process resulted in an adjustable and cost-effective prosthesis. Functional validation revealed improvements in gait quality, symmetry, and spatiotemporal parameters with the prosthesis. Vertical ground reaction forces during walking resembled the normal range, and running performance showed increased symmetry and propulsion velocity. The Timed Up and Go test showed that prostheses reduce time and improve efficiency. The development and functional validation of the 3D-printed TMT prosthesis offer a promising solution for individuals with TMT disarticulation. This approach addresses the need for assistive technologies in low-income countries with limited access to prostheses. Advanced technologies and a patient-centred approach contribute to improving mobility, gait patterns, and overall quality of life for individuals with partial foot amputations. Future research will focus on exploring additional parameters and developing new prostheses to further enhance gait improvements.