Intervertebral disc having translation

摘要

A prosthetic vertebral endplate (31) has an outer surface (33) adapted to mate with a vertebral body, and an inner surface (35) having a first opening (34) thereon. A body portion (43) connects the inner (35) and outer surfaces (33) and defines a sidewall having a second opening (37) thereon. The endplate (31) includes an articulation surface (41) suitable for supporting articulation motion. The first and second openings (34,37) communicate to form a channel (39) having a first open end.