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Journal of Bone and Joint Surgery - British Volume, Vol 87-B, Issue 6,
879-883.
doi: 10.1302/0301-620X.87B6.15543 Copyright © 2005 by British Editorial Society of Bone and Joint Surgery The biomechanical effect of radial shortening on the radiocapitellar articulationM. Diab, MD, Associate Professor, Chief of Paediatric Orthopaedics; J. M. Poston, BS, Medical Student; P. Huber, BS, Research Assistant; and A. F. Tencer, PhD, ProfessorDepartment of Orthopaedic Surgery, University of California, MU-320W, 500 Parnassus Avenue, San Francisco, California 94143-0728, USA, Department of Orthopaedics and Sports Medicine University of Washington, Harborview Medical Centre MS-359798, 325 Ninth Avenue, Seattle, Washington 98104, USA. Correspondence should be sent to Dr M. Diab; e-mail: diab{at}orthosurg.ucsf.edu
Repeated trauma to the radial head may be one of the causative factors in the genesis of osteochondritis dissecans of the capitellum. We measured the force, contact area and pressure across the radiocapitellar articulation of the elbow before and after radial shortening osteotomy in five fresh-frozen cadaver upper limbs with loads of 45, 90 and 135 N, respectively. Measurements were made on pressure-sensitive film placed in the radiocapitellar articulation with the forearm in the supinated, neutral and pronated positions before and after radial shortening. Radial shortening significantly reduced the mean force and contact area across the radiocapitellar articulation in all positions of the forearm.
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