Fenestrated bone wrap graft
View Patent ↗The present invention relates to a fenestrated bone wrap graft and a method of preparing cortical bone in thin sheets then fully demineralizing it to give it formed flexibility and then creating fenestrations in the cortical bone in a fashion similar to, but not identical to, skin grafts.
1. A fenestrated bone wrap graft consisting of cortical bone comprises:
an allograft bone structure made from a rib or other long bone and formed by removing cancellous bone leaving a hollow cortical bone as a thin walled tubular or cylindrical shaped graft having a wall thickness (t) of 1 mm or less and a length of 8 cm or greater, the allograft bone structure having an exterior or outer surface and an interior or inner surface, the structure being fenestrated with a plurality of pores or openings extending through from the exterior or outer surface to the interior or inner surface to form open passages;
wherein the allograft bone structure is made highly pliable configured to be conformable to flex and wrap about an exterior surface of a solid 3-dimensional structure such as a damaged bone or an implant device by demineralization; wherein the allograft bone structure is made highly pliable by milling or grinding the tubular or cylindrical shaped graft prior to demineralizing and thereafter freeze-dried for storage, the freeze-dried allograft bone structure placed in sterile packaging to be reconstituted in saline or lactated ringers for clinical use; and
wherein the structure is fenestrated by cutting the plurality of openings, the cut openings are oblong sized to be 3.0 mm long and 1.5 mm wide and wherein the bone structure has struts in a size of 0.8 mm to 1.2 mm in width forming strut networks having connective portions at ends of the openings, wherein at the connective portions of the strut the size doubles forming a uniformity and openness of the porous bone structure and intervening connected struts and wherein the tubular or cylindrical shaped graft has a pair of ends that are foldable to close the ends of the graft.
2. The fenestrated bone wrap graft of claim 1 wherein the bone structure is from a rib.
3. The fenestrated bone wrap graft of claim 1 wherein the bone structure is from a tibia.
4. The fenestrated bone wrap graft of claim 1 wherein one of the ends is sutured closed to form a basket.
5. The fenestrated bone wrap graft of claim 4 wherein both of the ends are sutured or woven closed.
6. The fenestrated bone wrap graft of claim 5 wherein both ends are closed, the basket of the allograft bone structure forms a pouch.
7. The fenestrated bone wrap graft of claim 6 wherein the pouch is filled with a stuffing made with one or more of cancellous bone material, autologous or allogenic bone graft, with or without stem cells, allograft bone particulate graft or dbm or stem cells, BMA or any combination thereof.
8. The fenestrated bone wrap graft of claim 4 wherein the basket is filled with one or more of cancellous bone material, autologous or allogenic bone graft, with or without stem cells, allograft bone particulate graft or dbm or stem cells, BMA or any combination thereof.
9. The fenestrated bone wrap graft of claim 1 wherein the bone allograft structure has a thickness of 0.1 mm to 1 mm.