Bone grafts

A hollow spinal spacer for engagement between vertebrae, comprising:

• a body formed of bone composition and including an anterior wall with opposite ends and defining a convexly curved anterior surface, an opposite posterior wall having opposite ends and defining a flat posterior surface, two lateral walls, each integrally connected between said opposite ends of said anterior and posterior walls to define a chamber, said walls further defining a superior vertebral engaging surface defining a first opening, said first opening in communication with said chamber, and an inferior vertebral engaging surface defining a second opening, said second opening in communication with said chamber;
• and
• at least one of said vertebral engaging faces defining a set of migration resistance grooves, each of said grooves including a first face defining an angle of no more than about 90 degrees relative to said one of said engaging surfaces and a second opposing sloped face, said first and second faces defining a substantially arcuate pocket therebetween for trapping vertebral bone, said grooves in series with said sloped faces sloping towards said anterior wall.

A spinal spacer for engagement between vertebrae, comprising:

• a body formed of a bone composition and including a first end, an opposite second end, a superior face defining a superior vertebral engaging surface and an inferior face defining an inferior vertebral engaging surface;
• and
• at least one of said vertebral engaging surfaces defining a first set of migration resistance grooves, each of said grooves including a first face defining an angle of no more than about 90 degrees relative to said one of said engaging surfaces and a second opposing sloped face, said first and second faces defining a pocket therebetween for trapping vertebral bone, said one of said engaging surfaces defining a peak between each of said grooves, said peak defining a flattened surface.

A spinal spacer for engagement between vertebrae, comprising:

• a body formed of a bone composition and including a first end, an opposite second end, a superior face defining a superior vertebral engaging surface and an inferior face defining an inferior vertebral engaging surface;
• and
• at least one of said vertebral engaging surfaces defining a first set of migration resistance grooves, said at least one of said vertebral engaging surfaces defining a second set of migration resistance grooves, each of said grooves including a first face defining an angle of no more than about 90 degrees relative to said one of said engaging surfaces and a second opposing sloped face, said first and second faces defining a pocket therebetween for trapping vertebral bone, each of said sloped faces of said grooves of said first set sloping toward said first end, each of said sloped faces of said grooves of said second set sloping toward said second end.