Cortical and cancellous allograft cervical fusion block

A sterile composite graft comprising:

• a cancellous bone component member and a load bearing component member mounted to said cancellous bone component member, said load bearing component member having an outside exposed surface area ranging from about 15% to about 40% of the outside exposed surface area of the cancellous component member, said cancellous bone component member defining a planar outer surface and defining a shaped recess cut into said planar outer surface extending into the interior of the cancellous bone component member, said load bearing component member having a T shaped configuration with a flat inner surface on the base of the crosspiece and a stem extending outward from said crosspiece flat surface, said stem being configured with a distal portion being larger than its proximal portion to fit into said shaped recess holding said component members together in a mated relationship, said load bearing and cancellous bone component members defining bores which are axially aligned when the component members are mated together and pins mounted in said axially aligned bores, said pins extending across an intersection between said cancellous bone component member and said load bearing component member to prevent sliding movement between said load bearing component member and said cancellous bone component member.

A sterile composite graft comprising:

• a cancellous bone component member and cortical bone component member, said cancellous bone component defining a U shaped configuration when viewed from a top planar view with the ends of the legs of the U defining a flat surface and the interior of the U forming a shaped recess, said cortical bone component member having an outside exposed surface area ranging from about 15% to about 40% of the outside exposed surface area of said cancellous bone component member, and defining a flat inner surface which is seated on said cancellous bone component member legs flat surfaces and a mating member extending from said flat inner surface of said bone component member, said mating member being configured to fit into said shaped recess holding a first and second bone components together, said component members each defining bores which are axially aligned when the component members are mated together and pins mounted in said axially aligned bores, said pins extending across an intersection between said cancellous bone component member and said cortical bone component member to prevent relative movement between said load bearing component member and said cancellous bone component member.

A sterile composite graft comprising:

• a first cancellous bone component member with angled sides and a second load bearing component member mounted to said first cancellous bone component member, said load bearing component member has an outside exposed surface area ranging from about 15% to about 40% of the outside exposed surface area of the cancellous member, said cancellous bone component member defining a planar engagement surface for the load bearing component member with a truncated ellipsod shaped recess cut into said planar engagement surface into the interior of the cancellous bone component member with at least a portion of said shaped recess being larger than the opening leading to the shaped recess, said load bearing component member defining an inner planar engagement surface and a locking member extending outward from said engagement surface, said locking member being correspondingly truncated ellipsoid shaped, to fit into said truncated ellipsoid shaped recess of said cancellous bone component member holding said first and second component members together in a mated relationship and pin means mounted through said load bearing component member and extending into said cancellous bone component member to prevent sliding movement between said load bearing component member and said cancellous bone component member.

A sterile composite bone graft for use in human implants comprising:

• an allograft cancellous bone component member and an allograft cortical bone component member mated to the cancellous bone component member, said cancellous bone component member defining a U shaped cross section with end surfaces of the legs of the U forming a flat surface and the interior of the U being formed with a truncated ellipsoid shaped recess and tapered side walls, said cortical bone component member defining a base with an inner surface which seats on said cancellous bone component member flat surface and an ellipsoid shaped mating member extending from said inner surface, said ellipsoid shaped mating member being configured to fit into said ellipsoid shaped recess holding a first and second bone components together.

A sterile composite bone graft for use in human implants comprising:

• a load bearing member constructed of allograft cortical bone defining a planar surface and a dove tail mating shaped member extending from said planar surface, an allograft cancellous member defining tapered side walls at an angle ranging from about 100° to about 110° from a line drawn through the longitudinal center axis, a flat proximal end surface and a flat distal end surface and a dove tail shaped recess cut into said flat proximal end surface with the narrowest portion of said recess exiting said flat proximal end surface, said allograft load bearing member and allograft cancellous member being mated together, said load bearing member having an outside exposed surface area ranging from about 15% to about 40% of the outside exposed surface area of said load bearing member.