Apparatus for biodegradable, osteogenic, bone graft substitute device
First Claim
1. A biodegradable device for facilitating healing of structural voids in bone, cartilage as well as soft tissue comprising, in combination:
- a. a porous macrostructure, formed from a biodegradable polymer, providing a porous architecture as well as structural and mechanical integrity to the structural void being treated, with the porous macrostructure including interconnecting voids; and
b. a porous microstructure, formed from a chemotactic ground substance and located in the interconnecting voids of the porous macrostructure and carried by and separate from the biodegradable polymer forming the porous macrostructure.
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Accused Products
Abstract
Device and method for treating mammalian bone deficiencies, defects, voids and conformational discontinuities produced by congenital deformities, osseous and/or soft tissue pathology, traumatic injuries and functional atrophy is described. The device is a one piece molded body member composed of four substances, each of which contributes to the device, a specific requirement (or requirements) for osteogenesis and/or osteoneogenesis. Taken as a whole, the functions of these device constituents are integrated into a single body member which, when implanted into a bone defect, has the capacity to restore functional architecture and mechanical integrity, initiate osteoinduction and osteogenesis, and maintain the biological process of bone formation and remodeling while the host organism is simultaneously biodegrading the body member. The ultimate result of the functioning is formation of healthy, viable bone tissue where there was not bone before, while, simultaneously, the entire device is hydrolyzed and completely metabolized by the host organism. The device comprises four disparate elements: POLYLACTIC ACID, HYALURONIC ACID BONE MORPHOGENETIC PROTEIN and BONE DERIVED GROWTH FACTOR. Working together, these elements provide the following five biological functions prerequisite to the processes of osteoneogenesis: structural competence (polylactic acid), chemotaxis (hyaluronic acid), electronegative field (hyaluronic acid and physical-chemical electrokinetic events), osteoinduction (bone morphogenetic protein), and osteogenesis (bone derived growth factor).
135 Citations
22 Claims
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1. A biodegradable device for facilitating healing of structural voids in bone, cartilage as well as soft tissue comprising, in combination:
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a. a porous macrostructure, formed from a biodegradable polymer, providing a porous architecture as well as structural and mechanical integrity to the structural void being treated, with the porous macrostructure including interconnecting voids; and b. a porous microstructure, formed from a chemotactic ground substance and located in the interconnecting voids of the porous macrostructure and carried by and separate from the biodegradable polymer forming the porous macrostructure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22)
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21. The device of claim 2o wherein said biodegradable polymer is selected from the group consisting of D,L-polylactic acid, L-polylactic acid, glycolic acid and co-polymers thereof.
Specification