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US 8,298,267 B2Granted
Spine implant with a deflection rod system including a deflection limiting shield associated with a bone screw and method
AssigneeSpartek Medical, Inc.
InventorsSteven T. Mitchell, Charles J. Winslow, John J. Flynn, James F. Zucherman, Ken Y. Hsu, Donald L. Cain, Henry A. Klyce, H. Adam R. Klyce
Life of this patent
Estimating the term…
Abstract
A dynamic stabilization, motion preservation spinal implant system includes a deflection rod system implant. The system is modular so that various constructs and configurations can be created and customized to a patient.
Claims34
An implant adapted to be implanted in a spine comprising:
- a bone anchor having a proximal head, a distal tip, and a longitudinal axis;
- a cavity formed in the proximal head of the bone anchor coaxial with the longitudinal axis;
- a deflection rod having a proximal end and a distal end, the deflection rod being disposed in the cavity aligned with the longitudinal axis such that the proximal end extends out of the cavity and the distal end is secured to said bone anchor within said cavity;
- wherein a deflectable portion of the deflection rod disposed within the cavity is spaced from the proximal head of the bone anchor such that the deflectable portion of the deflection rod can deflect within said cavity transverse to the longitudinal axis in response to a load applied to the proximal end of the deflection rod;
- a bone anchor thread which extends along said bone anchor from said distal tip to a point further from the distal tip than the distal end of the deflection rod such that at least a portion of said deflectable portion of said deflection rod is adapted to be implanted beneath the surface of a bone.
2 more elements
An implant adapted to be implanted in a spine comprising:
- a bone anchor having a proximal head, a distal tip, and a longitudinal axis;
- a cavity formed in the proximal head of the bone anchor;
- a deflection rod having a proximal end and a distal end, the deflection rod being disposed in the cavity such that the proximal end extends out of the cavity and the distal end is secured to said bone anchor within said cavity;
- wherein a deflectable portion of the deflection rod disposed within the cavity is spaced from the proximal head of the bone anchor such that the deflectable portion of the deflection rod can deflect within said cavity transverse to the longitudinal axis in response to a load applied to the proximal end of the deflection rod;
- a bone anchor thread which extends along said bone anchor from said distal tip to a point further from the distal tip than the distal end of the deflection rod such that at least a portion of said deflectable portion of said deflection rod is adapted to be implanted beneath the surface of a bone;
- said deflection rod comprising a superelastic material;
- said deflection rod being co-axial with said bone anchor;
- and
- a connector rod movably secured to said proximal end of said deflection rod.
6 more elements
An implant adapted to be implanted in a spine comprising:
- a bone anchor having a proximal head, a distal tip, and a longitudinal axis;
- a cavity, formed in the proximal head of the bone anchor;
- a deflection rod having a proximal end and a distal end, the deflection rod being disposed in the cavity such that the proximal end extends out of the cavity and the distal end is secured to said bone anchor within said cavity;
- wherein a deflectable portion of the deflection rod disposed within the cavity is spaced from the proximal head of the bone anchor such that the deflectable portion of the deflection rod can deflect within said cavity transverse to the longitudinal axis in response to a load applied to the proximal end of the deflection rod and such that at least a portion of said deflectable portion of said deflection rod is adapted to be implanted beneath the surface of a bone;
- and
- wherein said deflection rod comprises an inner rod and an outer shell located about said inner rod and wherein said inner rod and outer shell are mounted in said cavity and said cavity limits the deflection of said inner rod and said outer shell.
3 more elements
Dependencies are inferred from the claim text.