Scientific articleMorphometric Analysis of Potential Osteochondral Autografts for Resurfacing Unicondylar Defects of the Proximal Phalanx in PIP Joint Injuries
Section snippets
Anatomical measurements
Ten fresh-frozen cadaveric hands were thawed and dissected to harvest the metacarpals and the proximal phalanges. The anteroposterior (AP; height), radial-ulnar (width), and radius of curvature (ROC) dimensions of the heads of the index, middle, ring and small finger proximal phalanges and the bases of the ring and small metacarpals were measured from posteroanterior (PA) and lateral radiographic views.
To ensure proper orientation of the harvested specimens, each bone was embedded in clay, each
Morphometry
Anteroposterior, radial-ulnar, and ROC dimensions for the index through little proximal phalangeal condyles and the little and ring metacarpal bases are shown in Table 1. The radial condylar dimensions were greater than the ulnar condylar dimensions for the ring and small fingers. The opposite was found for the index and long fingers. The largest condyle measured was the ulnar condyle of the long finger, and the smallest was the ulnar condyle of the small finger.
The anatomic dimensions of the
Discussion
In this investigation, the base of the small and ring finger metacarpals were morphometrically assessed as potential donors to replace 1 of the condyles of the proximal phalanx. Of the 2 potential donor grafts investigated, only the small metacarpal base demonstrated adequate graft material to resurface all dimensions of the largest phalangeal condyles. Both potential donors demonstrated adequate graft in the AP and dorsal radial-ulnar dimensions. When assessing volar width, however, only the
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