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Biomechanical Testing of the Fractured Distal Radius Treated with A New Bone Cement–Is it Strong Enough?

From the Department of Orthopaedic and Trauma Surgery, University of Dundee, the Department of Orthopaedic Surgery, Osaka-Minami National Hospital, Kawachinagano, Japan, the Rinku General Medical Center, the Kuraray Medical, Inc., Sakazu, Kurashiki, Japan

Correspondence: Mr C. A. Wigderowitz, Department of Orthopaedics and Trauma, Ninewells Hospital and Medical School, TORT Building, Dundee, DD1 9SY, UK. Tel.: +44 1382 600111x34005/35746; fax: +44 1382 496200.E-mail: cawigderowitz{at}lineone.net

This study evaluates the in vitro ability of CAP, a bone graft substitute with osteointegration and osteoconductive properties, to restore the anatomy and strength of fractured distal radii. Ten pairs of cadaveric radii were imaged and tested to failure, simulating a fracture. The radii were reconstructed using CAP and were re-fractured and sequentially imaged. The deformities of the bones were determined through computerised evaluation of the radiographs. Radiographic analysis showed that CAP is capable of restoring the anatomy of the distal radius. The load and work required to fracture intact radii were compared to those required to fracture the reconstructed radii. The load to fracture was similar in the two situations. The work to fracture, however, was higher with reconstructed radii, suggesting that these are stronger than the original bones. Our study supports the hypothesis that CAP is capable of restoring the original anatomy and dimensions of the distal radius and re-establishing its mechanical strength.

Key Words: bone graft substitute • distal radial fracture • osteoconduction • osteointegration

Journal of Hand Surgery (British and European Volume), Vol. 31, No. 4, 385-389 (2006)
DOI: 10.1016/J.JHSB.2006.04.005


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