Three-dimensional kinematics and kinetics of getting into and out of a car in patients after total hip arthroplasty |
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| Affiliation: | 1. Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan;2. Department of Medical-Engineering Collaboration for Healthy Longevity, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan;3. Department of Orthopaedic Surgery, Faculty of Medical Sciences, Saga University, 5-1-1 Nabeshima, Saga 849-0937, Japan;1. Center for Motion Analysis, Connecticut Children’s Medical Center, Farmington, CT, USA;2. Division of Neurology, Connecticut Children’s Medical Center, Farmington, CT, USA;3. Division of Orthopedics, Connecticut Children’s Medical Center, Hartford, CT, USA;4. Children''s Orthopaedic Center, Children’s Hospital Los Angeles, Los Angeles, CA, USA;1. Department of Physical Medicine and Rehabilitation, Taoyuan Armed Forces General Hospital, No.168, Zhongxing Rd., Longtan Dist, Taoyuan City 32551, Taiwan;2. Graduate Institute of Rehabilitation Counseling, National Taiwan Normal University, No. 129, Section 1, Heping E. Rd., Taipei City 106010, Taiwan;1. Department of Physical Medicine and Rehabilitation, University of Florida, PO Box 112730, Gainesville, FL 32607, United States;2. Department of Pediatrics, University of Florida, 1600 SW Archer Road, Gainesville, FL 32610, United States;3. Department of Orthopaedics, University of Florida, PO Box112727, Gainesville, FL 32611, United States;1. Division of Rehabilitation Medicine, The Children''s Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA;2. Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, 3400 Civic Center Blvd, Philadelphia, PA 19104, USA;3. Department of Physical Therapy, The Children''s Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA;4. University of North Carolina, Chapel Hill, NC, USA;5. Center for Public Health Readiness and Response, The Children''s Hospital of Philadelphia, Philadelphia, PA 19104, USA;6. Division of Pediatric Neurology, The Children''s Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA;7. Department of Neurology, Perelman School of Medicine, University of Pennsylvania, 3400 Civic Center Blvd, Philadelphia, PA 19104, USA;8. Performance, Santé, Métrologie, Société (PSMS), UFR STAPS (University of Sport Sciences), 51100 Reims, France;9. Gait and Balance Academy, ProtoKinetics, Havertown, PA 19083, USA;1. Wingate College of Physical Education and Sports Sciences, Wingate Institute, Netanya, Israel;2. Research Institute for Sport and Exercise, University of Canberra, Australia;3. Faculty of Health, University of Canberra, Canberra, Australia;1. Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. Division of Sport Rehabilitation, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan;3. Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Obu, Japan |
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| Abstract: | BackgroundIn modern society, car usage is one of the most important activities of daily living. However, the three-dimensional (3D) mechanics of getting into and out of a car in total hip arthroplasty (THA) patients have not been studied.Research questionThis study aimed to elucidate the hip kinematics and kinetics of unilateral THA patients while getting into and out of a car.Methods3D motion and ground reaction force data were collected for 40 unilateral primary THA and 30 control participants using motion capture of getting into and out of a car. Normalized joint power was used to determine the individual joint contribution and was calculated by dividing the power of each joint by the total lower-extremity power. These kinematic and kinetic data were compared between unilateral THA and control participants.ResultsWhen getting into the car using the surgical side as the pivot limb, the peak flexion, abduction angle, and normalized power of the pivot hip were significantly lower, and the normalized power of the contralateral ankle was significantly higher. The peak flexion and abduction angle of the pivot hip were significantly lower, and normalized contralateral hip power was significantly higher when getting out of the car. In getting into and out of the car using the contralateral side as the pivot limb, there was no significant difference in the range of motion (RoM) and normalized joint power.SignificanceThe restoration of RoM and muscle strength in the surgical hip joint and adopting the normal side as the pivot limb may allow for a more appropriate balance in motion of getting into and out of a car, which will lead to safe mobility, assist in social participation, and improved quality of life.Level of evidenceLevel III, therapeutic study. |
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| Keywords: | Total hip arthroplasty Car Motion capture Kinematics Kinetics |
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