Biomechanics of the wrist after proximal row carpectomy in cadavers

Author:

Zhu Y.-L.1,Xu Y.-Q.1,Ding J.1,Li J.1,Chen B.1,Ouyang Y.-F.1

Affiliation:

1. Orthopaedic Department, Kunming General Hospital, Third Military Medical University, China

Abstract

We investigated the biomechanics of the radiocapitate joint after a proximal row carpectomy in six fresh-frozen cadaver wrists using super-low-pressure-sensitive film on a material testing system. The average pressure within the lunate fossa increased significantly from 23.2 to 136.4 N/cm2 with a sharp decrease in the contact area from 2.08 to 0.30 cm2 after a proximal row carpectomy. The cartilage of the proximal capitate had four sub-facets and therefore was not as smooth as the normal proximal lunate. We found that the wrist was overloaded after a proximal row carpectomy and the main cause was the anatomical mismatch of the radiocapitate articulation.

Publisher

SAGE Publications

Subject

Surgery

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