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Journal of Hand Surgery (British and European Volume)
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Articles

Morphological Measurements of the Proximal Interphalangeal Joint

T. LAWRENCE
I. A. TRAIL
J. NOBLE

From the University Departments of Orthopaedics and Upper Limb Surgery, Wrightington Hospital, Wigan, UK

Correspondence: Mr I.A. Trail, Consultant Orthopaedic Surgeon, Centre for Hand and Upper Limb Surgery, Wrightington Hospital, Hall Lane, Appley Bridge, Wigan WN6 9EP, UK. Tel.: +44-1257-256248; fax: +44-1257-256248; E-mail: uplimb{at}wrightington.org.uk

The morphology of the proximal interphalangeal joint was determined using a photographic technique. The head of the proximal phalanx, viewed end on, has a complex trapezoid appearance characteristic for each named digit. The asymmetric condyles diverge from one another and are separated by an intercondylar groove that increases in depth from the dorsal to the palmar surface. Saggital sections of the head of the proximal phalanx are not circular, but, sections taken in the plane of maximum dimensions of the condyle are circular with a radius of curvature of approximately one half of the height of the condyles.

The articular surface of the base of the middle phalanx is not circular in outline in either the saggital or coronal plane. In coronal sections the articular surface is biconcave convex with a prominent median ridge separating the two adjacent concave articular surfaces.

The implications of this varied morphology on implant design are discussed.

Key Words: morphology • arthroplasty • proximal interphalangeal joint

Journal of Hand Surgery (British and European Volume), Vol. 29, No. 3, 242-247 (2004)
DOI: 10.1016/J.JHSB.2004.01.010
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