A fixation device, such as a bone screw, includes a bioresorbable proximal shaft portion and a non-bioresorbable distal threaded portion. In one aspect, the shaft portion is provided with a longitudinal throughbore which is aligned with a corresponding longitudinal bore in the proximal region of the...http://www.google.es/patents/US6471707?utm_source=gb-gplus-sharePatente US6471707 - Bone screw having bioresorbable proximal shaft portion
Bone screw having bioresorbable proximal shaft portion
