The goal of this clinical trial is to evaluate the applicability, effectiveness, and usability of a shape memory alloy-based orthosis for patients with finger proximal interphalangeal joint stiffness. This cutting-edge design incorporates shape memory alloy into the device for improving proximal interphalangeal joint stiffness and, secondarily, enhancing the ability to perform activities. Half of the participants will be assigned to experimental group, receiving a shape memory alloy-based orthosis for home program. The other half will be assigned to control group, receiving a conventional stretching program. Three evaluations, examining range of motion and hand functional performance, will be conducted before intervention, 4 weeks and 8 weeks after baseline by the researchers.
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Range Of Motion
Timeframe: Baseline, 4 weeks after baseline, and 8 weeks after baseline