Particulate bone is more easily and quickly guided into position for impaction into the site of a fusion mass by using a surgical funnel provided by an elongated, thin, flat base and a pair of thin, upstanding walls which extend along the elongated edges of the base to provide a chute. While the outlet...http://www.google.fr/patents/US4800875?utm_source=gb-gplus-shareBrevet US4800875 - Surgical funnel and method of using
