ABSTRACT

This work proposes a digital methodology for producing patient-specific wrist immobilisation splint and evaluates form, fit and functional aspects of the fabricated splint by finite element analysis and post production performance testing. The upper limb of a volunteer is first scanned using a 3D scanner, then the data is reverse engineered to obtain a CAD model of the desired splint. Finally, A polyamide full-scale wrist splint is fabricated using selective laser sintering approach. Maximum von Mises stress and deflection developed during finite element analysis of CAD model are found 18.98 MPa and 0.68 mm respectively. The flexural and compressive strength of polyamide-PA2200 specimens have been found 67 MPa and 56 MPa respectively. In post production fitment test, splint is found conforming to anatomical shape, capable of providing adequate ventilation and performing intended task. Results show that the proposed methodology is technically feasible and has potential to be used as an alternative method of producing patient specific wrist immobilisation splint.

摘要

这项工作提出了一种用于生产患者专用腕部固定夹板的数字方法，并通过有限元分析和生产后性能测试来评估制造夹板的形式、适合度和功能方面。首先使用 3D 扫描仪扫描志愿者的上肢，然后对数据进行逆向工程以获得所需夹板的 CAD 模型。最后，使用选择性激光烧结方法制造了聚酰胺全尺寸腕夹板。在 CAD 模型的有限元分析过程中产生的最大 von Mises 应力和挠度分别为 18.98 MPa 和 0.68 mm。聚酰胺-PA2200 试样的抗弯强度和抗压强度分别为 67 MPa 和 56 MPa。在后期生产装配测试中，发现夹板符合解剖形状，能够提供足够的通风并执行预期的任务。结果表明，所提出的方法在技术上是可行的，并且有可能用作生产患者特定腕部固定夹板的替代方法。