Michael S. Veldman,Thomas A. Carls,Jonathan M. Dewey
申请号：
US11668746
公开号：
US08109975B2
申请日:
2007.01.30
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A dynamic spinal stabilization assembly includes at least one mounting collar with a bore therethrough along a longitudinal axis, and a spinal rod slidably extending through the bore. The bore includes a medially disposed first section of reduced size that tapers both inwardly and outwardly relative to the axis, and respective end sections of relatively larger size. The bore may be defined by an interior wall that convexly curves toward the axis in the first section, advantageously with a constant non-zero radius of curvature. The bore profile helps minimize potential binding that may occur between the collar and the rod. The rod is coupled to bone anchoring elements, with at least one such connection being via the collar.
