Fixation system for orthopedic devices

摘要

A fixation system configured to releasably secure an orthopedic implant to a bone. The fixation system including at least one expandable member that is inserted through the lumen and positioned in cancellous bone near the distal portion of the orthopedic implant. A delivery tube delivers a flowable biomaterial to the expandable member. The expand fixation structure includes at least one dimension greater than a corresponding dimension on the orthopedic implant to secure the orthopedic implant in the bone. An insert is secured in the lumen to releasably attach the fixation system to the orthopedic implant. The expandable member is detachable from the orthopedic implant to facilitate subsequent removal of the orthopedic implant from the bone.

主权项

1. A fixation system that releasably secures to an orthopedic implant to supplement fixation of the orthopedic implant in a cancellous portion of a bone, the orthopedic implant having at least one lumen extending from a proximal portion to a distal portion configured to extend through cortical portions and into the cancellous portions of the bone, the fixation system that releasably secures to the orthopedic implant comprising:
at least one expandable member configured to extend through the lumen of the orthopedic implant and into the cancellous bone near the distal portion of the orthopedic implant, the expandable member comprises at least one chamber; a flowable biomaterial that flows through the lumen and into the at least one chamber to inflate the expandable member to an expanded configuration located in the cancellous bone, the expanded configuration comprising at least one dimension greater than a corresponding dimension on the orthopedic implant located generally along a pull-out direction of the orthopedic implant; and an insert that releasably attaches the fixation system in the lumen of the orthopedic implant to supplement fixation of the orthopedic implant in the cancellous bone such that the expandable member is detachable from the orthopedic implant to facilitate subsequent removal of the orthopedic implant from the bone without removal of the biomaterial from the bone.