US Patent 7875080 Intervertebral spacer

An interbody spacer for insertion between vertebral members. The spacer includes a body having posterior and anterior sides, and inferior and superior faces. The spacer further includes a plurality of teeth to maintain the position of the spacer between the vertebral members. The teeth are aligned in a pattern and have a shape to allow insertion into the space between the vertebral members, and prevent or limit movement once the spacer is positioned in the space.