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Intervertebral disc prosthesis with transversally arched, curved cyclindrical articulation surfaces for the lumbar and cervical spine
Intervertebral disc prosthesis with transversally arched, curved cyclindrical articulation surfaces for the lumbar and cervical spine
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机译:椎间盘假体,具有用于腰椎和颈椎的横向弓形弯曲圆柱关节面
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摘要
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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