EMD stimulates angiogenesis in the CAM model. As a heterogeneous mixture of extracellular matrix components, EMD may have multiple biologic functions, but it is likely that at least part of the explanation for its observed positive clinical effects may be the stimulation of angiogenesis. The fact that vascularity was also increased by recombinant human amelogenin raises the possibility that this 28.9-kDa protein may be the source of the angiogenic activity because it is the predominant protein of the EMD mixture. These results, taken together with results from previously reported in vitro studies, suggest that EMD may increase angiogenesis directly and/or indirectly at the wound-healing site.
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