title: Design, fabrication, and preliminary results of a novel below-knee prosthesis for snowboarding: A case report.
abstract: Snowboarding with a below-knee prosthesis is compromised by the limited rotation capabilities of the existing below-knee prostheses, which are designed for use in normal walking. Based on snowboarding range of motion analyses, a novel below-knee prosthesis was designed with the aim to achieve similar range of motions like able-bodied snowboarders. The new prosthesis allows for passive inversion/eversion, passive plantarflexion/dorsiflexion and additional 'voluntary' plantarflexion/dorsiflexion initiated by lateral or medial rotation of the upper leg and knee. A prototype was built and was subsequently tested on a single subject, a highly professional snowboarder and candidate for the Olympic Winter Games. The movements of the subject were recorded on video, analyzed and compared to the recorded movements of an able-bodied snowboarder, and a snowboarder with a traditional below-knee prosthesis. The results indicated an increased similarity of inversion/eversion and plantarflexion/dorsiflexion between the snowboarder with the new below-knee prosthesis and the able-bodied snowboarder, whereas the snowboarder with the traditional below-knee prosthesis and the able-bodied snowboarder differed considerably. These results indicate that snowboarding with the new prosthesis is more comparable to able-bodied snowboarding. On a subjective basis this is confirmed by the test subject who stated that: "snowboarding with the new prosthesis is like it was before the amputation!".
authors: Delft Institute of Prosthetics and Orthotics, Delft University of Technology, Delft, The Netherlands.
authors: Sander L M
authors: SL
authors: Minnoye
authors: Dick H
authors: DH
authors: Plettenburg
mesh_terms: D000674:Amputees / Q000534:rehabilitation; D000843:Ankle Joint / Q000502:physiology; D001186:Artificial Limbs / Q000639:trends*; D001696:Biomechanical Phenomena; D005260:Female; D005528:Foot / Q000502:physiology; D006801:Humans; D008422:Materials Testing; D008954:Models, Biological; D011474:Prosthesis Design / Q000295:instrumentation / Q000639:trends*; D017755:Prosthesis Fitting / Q000295:instrumentation / Q000639:trends*; D016059:Range of Motion, Articular / Q000502:physiology; D012865:Skiing / Q000502:physiology*