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Journal of Bone and Joint Surgery - British Volume, Vol 85-B, Issue 4, 538-544.
doi: 10.1302/0301-620X.85B4.13925  
Copyright © 2003 by British Editorial Society of Bone and Joint Surgery
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Variation in the position and orientation of the elbow flexion axis

A. Ericson, MD, Consultant Orthopaedic Surgeon1; A. Arndt, PhD, Head, Biomechanics Laboratory2; A. Stark, MD, PhD, Associate Professor1; P. Wretenberg, MD, PhD, Associate Professor1; and A. Lundberg, MD, PhD, Associate Professor2

1 Department of Orthopaedics, Karolinska Institute at Karolinska Hospital, 171 76 Stockholm, Sweden.
2 Department of Orthopaedics, Karolinska Insitute at Huddinge University Hospital, 141 86 Stockholm, Sweden.

Correspondence should be sent to Dr A. Ericson.

We analysed the axis of movement in the normal elbow during flexion in vivo using radiostereometric analysis (RSA). The results show an intraindividual variation in the inclination of the axis ranging from 2.1° to 14.3° in the frontal and from 1.6° to 9.8° in the horizontal plane analysed at 30° increments. The inclination of the mean axis of rotation varied within a range of 12.7° in the frontal and 4.6° in the horizontal plane. In both planes, the mean axes were located close to a line joining the centres of the trochlea and capitellum. The intra- and interindividual variations of the axes of flexion of the elbow were greater than previously reported. These factors should be considered in the development of elbow prostheses.




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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General