Manufacture of passive dynamic ankle-foot orthoses using selective laser sintering
Manufacture of passive dynamic ankle-foot orthoses using selective laser sintering
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DOI：
10.1109/tbme.2007.912638
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发表时间：
2008-02-01
影响因子：
4.6
通讯作者：
Stanhope, Steven J.
中科院分区：
文献类型：
--
作者：
Faustini, Mario C.;Neptune, Richard R.;Stanhope, Steven J.
踝足矫形器（AFO）的设计在尺寸、形状和功能特征上有所不同，这取决于所需的临床应用。被动动态（PD）响应踝足矫形器（PD- afos）是一种旨在通过被动地（像弹簧一样）在步态的站立阶段提供不同水平的支持来提高患有各种神经肌肉疾病的人的行走能力的设计。目前的PD-AFO制造技术要么是劳动密集型的，要么不适合PD-AFO弯曲刚度特性的详细细化。本研究的主要目的是探索使用快速自由成形技术，选择性激光烧结（SLS）作为PD-AFO制造工艺的可行性。通过复制碳纤维AFO （CF-AFO）的形状和功能特征来确定可行性。研究表明，基于sls的框架非常适合此应用程序。第二个目标是确定pd - afo储存和释放弹性能的最佳SLS材料；考虑通过内摩擦使能量耗散最小化是一种理想的材料特性。本研究比较了三种不同材料的CF-AFO和SLS制造的pd - afo的机械阻尼。机械阻尼评价结果为Rilsan (TM) D80（最佳），其次为DuraForm (TM) PA和DuraForm (TM) GF。此外，Rilsan (TM) D80是唯一能够承受大变形的SLS材料。
Ankle-foot orthosis (AFO) designs vary in size, shape, and functional characteristics depending on the desired clinical application. Passive Dynamic (PD) Response ankle-foot orthoses (PD-AFOs) constitute a design that seeks to improve walking ability for persons with various neuromuscular disorders by passively (like a spring) providing variable levels of support during the stance phase of gait. Current PD-AFO manufacturing technology is either labor intensive or not well suited for the detailed refinement of PD-AFO bending stiffness characteristics. The primary objective of this study was to explore the feasibility of using a rapid freeform prototyping technique, selective laser sintering (SLS), as a PD-AFO manufacturing process. Feasibility was determined by replicating the shape and functional characteristics of a carbon fiber AFO (CF-AFO). The study showed that a SLS-based framework is ideally suited for this application. A second objective was to determine the optimal SLS material for PD-AFOs to store and release elastic energy; considering minimizing energy dissipation through internal friction is a desired material characteristic. This study compared the mechanical damping of the CF-AFO to PD-AFOs manufactured by SLS using three different materials. Mechanical damping evaluation ranked the materials as Rilsan (TM) D80 (best), followed by DuraForm (TM) PA and DuraForm (TM) GF. In addition, Rilsan (TM) D80 was the only SLS material able to withstand large deformations.