Angulation vs translation of transtibial prosthetic socket: their difference analyzed by socket reaction moments |
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| Institution: | 1. Osaka Prefecture University, Habikino City, Osaka, Japan;2. Pacific Supply co. Ltd., Daito City, Osaka, Japan;3. Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China;1. Department of Orthopaedic Surgery, Keio University School of Medicine, Shinjuku, Tokyo 160-8582, Japan;2. Rapithela Corporation, Seto, Aichi 489-0979, Japan;3. Tomei Brace Co., Ltd, Seto, Aichi 489-0979, Japan;4. Sports Medicine Research Center, Keio University, Yokohama, Kanagawa 223-8521, Japan;5. Department of Clinical Biomechanics, Keio University School of Medicine, Shinjuku, Tokyo 160-8582, Japan;1. University of North Texas Health Science Center, Department of Physical Therapy, 3500 Camp Bowie Blvd, Fort Worth, TX 76107, USA;2. Peterson Regional Medical Center, Ambulatory Care Center, 260 Cully Drive, Kerrville, TX 78028, USA;3. Angelo State University, Physical Therapy Department, ASU Station #10923, San Angelo, Texas 76909, USA;1. Department of Physical Therapy, University of Alabama at Birmingham, 1720 Second Avenue South, AL, USA;2. Department of Kinesiology and Nutrition University of Illinois Chicago;1. Department of Nursing and Podiatry. University of Malaga, Spain;2. KULeuven, Department of Rehabilitation Sciences, Musculoskeletal Rehabilitation Research Group, Campus Brugge, Spoorwegstraat 12, 8200 Bruges, Belgium;3. Department of Podiatry, Artevelde University College, Ghent, Belgium;4. Institut D’Enseignement Supérieur Parnasse Deux-Alice, Division of Podiatry, Brussels, Belgium;5. IBIMA Malaga, Spain;1. Human Motor Systems Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil;2. Laboratory of Integrative Motor Behaviour, Centre for Neuroscience Studies, Queen’s University, Ontario, Canada;3. Exercise Neuroscience Research Group, School of Arts, Sciences, and Humanities, University of São Paulo, São Paulo, Brazil;4. Biomedical Engineering, Federal University of ABC, São Bernardo do Campo, São Paulo, Brazil |
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| Abstract: | BackgroundPrevious studies investigated the effects of alignment changes in transtibial prostheses on socket reaction moments. However, the effects of angular and translational alignment changes with equal displacement between the foot and the socket were not directly compared.Research questionsWhat are the different effects of angular and translational alignment changes in transtibial prostheses?MethodsTen individuals with transtibial prostheses participated in the measurement of temporo-spatial parameters, socket reaction moments, and their timings under nine alignment conditions (3° flexion/extension, anterior/posterior translation, 6° adduction/abduction, medial/lateral translation, and baseline). The displacement of the prosthetic feet was set to be equal between the angular and translational changes.ResultsNo significant changes in walking speed were found. Similar effects were observed in the magnitudes, but not in timing, of the moments under angular and translational changes in the sagittal plane (p < 0.01 for the differences in peak extension moment among anterior translation, baseline, and extension conditions, and in peak flexion moment among anterior translation, baseline, and extension conditions). In the coronal plane, similar effects were found in the magnitudes of the moments in the early stance (p < 0.01 at 5 %, 20 %, and 75 % stance). A significant difference in magnitude was observed in the late stance (p < 0.01 between adduction and medial translation conditions).SignificanceThe timing of the socket reaction moment may be different in the sagittal plane, while the magnitudes of the socket reaction moment in the late stance may be different in the coronal plane between the angular and translational alignment changes. |
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| Keywords: | Alignment Below-knee prosthesis Gait analysis Kinetic Walk |
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