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Bone anchor with offset rod connector

  • US 9,517,089 B1
  • Filed: 10/08/2014
  • Issued: 12/13/2016
  • Est. Priority Date: 10/08/2013
  • Status: Active Grant
First Claim
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1. A spinal anchor, comprising:

  • a shank having a threaded region for anchoring in bone, and a spherical head; and

    an offset connector for coupling the shank to a spinal rod offset from an axis of the shank, wherein the offset connector comprises;

    a base, the base having a first end with a receptacle for forming a first lockable polyaxial joint with the spherical head of the shank, the base further including an arm that extends from the receptacle, the arm having a first length, a first height, and a first width; and

    a tulip, the tulip forming a second lockable polyaxial joint translatable along a length of the base and having a rod channel for coupling the tulip to a spinal rod, the tulip further including a passage, the passage having a second length less than the first length, a second height greater than the first height, and a second width greater than the first width, the arm of the base extending through the passage such that the arm can rotate relative to the tulip while extending through the passage, the arm also extending through a compressible member situated within the passage, the compressible member comprising the second polyaxial joint.

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