DUGGAL, NEIL,RAYMOND, LOUISE C.,BUTTERS, JOSHUA A.,ARNETT, JEFFERY D.,HUSHKA, DYLAN
申请号：
CA2703237
公开号：
CA2703237C
申请日:
2008.10.27
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
The present invention provides artificial disc prostheses, methods andinstrumentation for implantation and revision.Each prosthesis may comprise superior and inferior end plates and a nucleuspositioned between articular surfaces of the end plates.The end plates may have planar bone engagement surfaces with a plurality ofself-cutting teeth. The articular surfaces of the endplates may be planar or include a flattened portion. The nucleus includessuperior and inferior articular surfaces which may compriseflattened portions such that when the articular surfaces of the nucleus andthe end plates are placed in a preferred orientation, theflattened and/or planar portions are aligned. Each prosthesis may provideflexion/extension, anterior/posterior translation, lateralbending, and/or axial rotation degrees of freedom. One embodiment comprises aprosthesis with a first joint providingflexion/extension and anterior/posterior translation, and a second jointproviding lateral bending and axial rotation.
