A dowel is provided by obtaining a plug from the shaft (diaphysis) of various long bones. The dowel has an intra-medullary canal which can be packed with any of a variety of osteogenic materials. The dowel has a cortical surface into which an instrument attachment hole may be machined and onto...http://www.google.fr/patents/US5814084?utm_source=gb-gplus-shareBrevet US5814084 - Diaphysial cortical dowel
