Patent ID: 8382837
Filing Date: 2013-02-26
Classification: A61B,A61F

Abstract:
1. A device for use in treating orthopedic defects in a procedure comprising inserting the device into a pre-formed cavity within a bony member and injecting bone cement or other orthopedic filler material into an interior region of the device, said device comprising: a collapsible, self-expanding mesh structure having a first, collapsed configuration and a second, expanded configuration, said first, collapsed configuration enabling the device to be inserted into the pre-formed cavity through a cannula and said second, expanded configuration being sufficient to maintain walls of the cavity apart from each other, wherein said mesh structure itself has regions of differential permeability or flow resistance, and wherein said mesh structure is a co-braided structure comprising primary members and secondary members occupying interstices between said primary members, and wherein said mesh structure has regions of increased permeability or decreased flow resistance in which secondary members are not present; wherein said device has regions of differential permeability or flow resistance to said bone cement or other orthopedic filler material such that when bone cement or other orthopedic filler material is injected into the interior region of the device, the bone cement or other orthopedic filler material flows out of the device in one or more predetermined preferred directions.