| 摘要 |
An intervertebral disk prosthesis (10) includes a first part (13), and the first part (13) has a top (13d), a bottom (13c) having an opening (13f), an outer surface (13a), an inner surface (13b) and a socket (13e) extending into an interior (13b) of the first part (13) from the opening (13f). The outer surface (13a) proximate the top (13d) contacts a concave portion of a first vertebra. The disk prosthesis (10) further includes a second part (11) including a top (11d), a bottom (11c), and an outer surface (11a). The outer surface (11a) proximate the bottom (11c) contacts a concave portion of a second vertebra, and the outer surface (11c) of the second part (11) proximate the top (11d) of the second part (11) cooperatively engages the inner surface (13b) of the first (13) part thereby allowing at least two-degrees of freedom of movement. |
