A suture anchor assembly is described which includes an elongated insertion stem and an approximately cylindrical anchoring element having an axial channel for receiving the insertion stem. In its nonexpanded state, the anchoring element can be placed into a pre-drilled opening in a bone. An ...http://www.google.es/patents/US5814071?utm_source=gb-gplus-sharePatente US5814071 - Suture anchor assembly and methods
