Disclosed is an intervertebral disc prosthesis for the total replacement
of a natural intervertebral disc within the lumbar and cervical spine,
comprising of articulating sliding partners. The upper sliding partner
has means for a firm assembly to an upper vertebral body and the lower
sliding partner has means for a firm assembly to a lower vertebral body.
At least one sliding surface is between two sliding partners. Two- and
three-part functional designs are planned and both having in common,
that, as a result of the shape of the articulating surface(s), the
laterolateral and dorsoventral motion amplitudes differ. The resulting
angles including the rotation around a fictitious vertical axis can be
defined to a desired extent.