EXPANDABLE BONE SUPPORT

摘要

A bone fixation device comprises a rod (102) extending from a proximal end located external to the body in an operative configuration to a distal end comprising an increased diameter tip sized and shaped to be received in a subchondral layer in the operative configuration and a first bushing (112) slidably received over the rod, a distal portion of the first bushing comprising a plurality of arms separable from one another to spread radially outward from the rod as the first bushing is moved distally over the tip of the rod in combination with a cannulated element slidably received over the rod, the cannulated element sized and shaped to engage a proximal end of the first bushing, a portion thereof located external to the bone in the operative configuration so that a distally directed force applied thereto moves the first bushing distally over the rod spreading the arms radially outward.