| http://www.w3.org/ns/prov#value | - n the first and second vertebrae; d) removing nuclear disk material from the intervertebral space; and e) inserting the intervertebral disk prosthesis through the small gap into and within a nuclear region of the intervertebral space between the first and second vertebrae, the intervertebral disk prosthesis including an upper part with a convexly-shaped and rounded top, a bottom having an opening,
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