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Allograft Tissues

Allograft tissues have been employed to reconstruct a variety of joint surfaces, and the humerus is certainly no different. The use of smaller focal defects, however, is not extensively described in the literature with the exception of a few case series. In one study, Gerber et al.It employed a large segmental humeral head allograft to reconstruct massive posterior humeral head defects (Hill-Sachs lesions) involving more than 40% of the articular surface.

This treatise included four patients treated with the technique. It was found that stability was restored and maintained in each patient at an average of 68 months following the procedure. Three patients reported little or no pain and no or slight functional restrictions in activities of daily lining. One patient had mild pain and moderate-to-severe dysfunction secondary to avascular necrosis of the remaining portion of the humeral head.

Although the technique appears to be worthwhile in this patient population, the use of this type of large allograft resurfacing in the more central portion of the humeral head may fare differently. The central humeral articular surface will experience significantly more mechanical stress compared to the peripheral humeral articular surface that was reconstructed with this technique.

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