![]() It often leads to permanent sequelae and eventually results in extensive physical and emotional disabilities in patients, families, and society. Spinal cord injury (SCI) is a major disorder that causes sensory, motor, and autonomic dysfunction in parts of the body served by the spinal cord below the level of injury. Trial registrationĬlinical Research Information Service (CRiS), Republic of Korea. This study proved that combining simple EMG-based control strategies and 3D printing techniques was feasible and promising in rehabilitation engineering. The 3D-printed myoelectric hand orthosis was intuitive, easy to use, and showed positive effects in its ability to handle objects encountered in daily life. There were no side effects associated with the experiment. Moreover, most participants were satisfied with the device as determined by the usability test. Furthermore, participants obtained immediate functionality on eating after wearing the orthosis. The newly developed orthosis improved hand function of subjects, as determined using the TRI-HFT ( p < 0.05). Furthermore, improvements in functional independence in daily living and device usability were evaluated. The Toronto Rehabilitation Institute Hand Function Test (TRI-HFT) was used as the primary outcome measure. Ten subjects with hand weakness due to chronic cervical SCI were enrolled in this study, and their hand function was assessed before and after wearing the orthosis. The root mean square of the EMG signal was used as the input for controlling the device. The dynamic hand orthosis enhanced the tenodesis grip to provide sufficient grasping function. ![]() The 3D architecture of the device was designed using computer-aided design software and printed with a polylactic acid filament. We applied this hand exoskeleton system to individuals with tetraplegia due to SCI and validated its effectiveness. ![]() The orthosis was designed to aid the grasping function for patients with cervical SCI. ![]() In this study, we proposed a novel 3D-printed hand orthosis that is controlled by electromyography (EMG) signals. As three-dimensional (3D) printing has the advantage of being able to produce low-cost personalized devices, there is a growing appeal to apply this technology to rehabilitation equipment in conjunction with scientific advances. New medical technologies, including various wearable devices, as well as rehabilitation treatments are being developed to enhance hand function in patients with SCI. Spinal cord injury (SCI) is a severe medical condition affecting the hand and locomotor function. ![]()
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