Abstract
A variety of materials have been evaluated as potential nerve grafts. To date, none has been shown to be consistently equal with regard to functional outcome when compared to standard autogenous nerve grafts. In this study, nerves stored in glycerol were evaluated for their peripheral nerve regenerative capacity. Femoral nerves were harvested from Fischer rats and stored for a minimum of 100 days in 98% glycerol at 4 degrees C. They were grafted into femoral nerve gaps of Lewis rats. After 3 months, histologic, electrophysiologic, and morphometric (axon diameter) analyses revealed less regenerative response than nerve gaps grafted with fresh, syngeneic controls. The differences disappeared by 6 months, although neither graft technique achieved recovery comparable to unoperated nerves. Immunohistochemical evaluation demonstrated a modest immune response at 3 months, which subsided by 6 months. These findings are encouraging for the development of glycerol-preserved nerve graft banking.
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