Intervertebral disc prosthesis with transversally arched, curved cyclindrical articulation surfaces for the lumbar and cervical spine
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United States of America Patent
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Sep 13, 2011
Grant Date -
Oct 19, 2006
app pub date -
Apr 18, 2006
filing date -
Oct 18, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An intervertebral disc prosthesis for the total replacement of a intervertebral disc within the lumbar and cervical spine is disclosed. The intervertebral disc prosthesis comprises articulating sliding partners, wherein 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 and at least one sliding surface that is between two sliding partners. Functional two- and three part designs are planned and both prostheses have in common, that only a dorsoventral- and rotation movement is possible as a result of laterolaterally aimed, transversally arched, ventrally curved cylindrical convexity(ies) and corresponding concavity(ies), however without an inclination of the sliding partners in a lateral direction. In a further design, the cylindrical articulation surfaces have no curvature, enabling a motion of the sliding partners in only a ventrodorsal direction. According to the invention, the intervertebral disc prostheses are suited for implantation from lateral and ventrolateral, particularly in revision surgeries.
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