Variable angle spinal screw assembly
申请(专利)号：
PCT/IB2004/001663
申请日期：
2004年5月21日
公开/公告号：
WO2004103194 A1
申请(专利权)人：
Thomas Purcell；Don Hair；Tamas T. Frech
国省代号：
US
被引量：
摘要：
A spinal screw assembly providing an adjustable securement of a fixation rod across at least two vertebrae. The assembly includes a pedicle screw having a spherical head portion, a threaded shaft portion and a tool engagement surface in the head portion for use in driving the screw into a vertebrae. The head portion of the screw is positioned in a body member adjacent a curvilinear surface disposed about an aperture in the end of the body member such that the shaft portion of the screw extends therethrough and the curvilinear inner surface abuts and mates with the head portion of the screw so as to define a ball joint therewith. The body member additionally defines a pair of opposed parallel slots therein adapted to receive a portion of the fixation rod and a locking cap bears against the fixation rod to releasably secure the rod within the assembly.
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