| abstract |
An intervertebral disk prosthesis includes a first part, and the first part has a top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the first part from the opening and defined by the inner surface. The disk prosthesis further includes a second part including a top, a bottom, and an outer surface. The outer surface of the second part proximate the top of the second part cooperatively engages the inner surface of the first part thereby allowing at least two-degrees of freedom of movement. At least one of the upper part and the lower part further comprises at least one arch spanning the outer surface proximate the top and the outer surface proximate the bottom, respectively. |