Damping element and device for stabilization of adjacent vertebral bodies
AssigneeSynthes USA, LLC
InventorsArmin Studer, Robert Frigg
Life of this patent
Estimating the term…
Abstract
A damping element includes: two spring elements which are coaxial with or parallel to a longitudinal axis and two axially end-side connectors, where the first spring element exhibits a spring rate F, the second spring element exhibits a spring rate f, and the spring rates F and f are different. A device stabilizing adjacent vertebrae, including N pedicle screws or hooks, where N is greater than or equal to 3 and where each pedicle screw or pedicle hook includes a receiving device receiving a longitudinal affixation device and where an element acting as a spring is inserted between two adjacent pedicle screws or pedicle hooks.
Claims31
A bone anchor system for stabilizing a plurality of bones, the system comprising:
- a first bone fixation element adapted to be secured to a first vertebrae;
- a second bone fixation element adapted to be secured to a second vertebrae;
- and
- a damping element sized and configured to be received by the first and second bone fixation elements, the damping element including a first spring element and a second spring element located inside the first spring element;
- wherein the first spring element is a helical spring including a plurality of coils and the second spring element is a polymer, the first spring element being formed of a different material than the second spring element.
A bone anchor system for stabilizing a plurality of bones, the system comprising:
- a first bone fixation element adapted to be secured to a first vertebrae;
- a second bone fixation element adapted to be secured to a second vertebrae;
- and
- a damping element sized and configured to be received by the first and second bone fixation elements, the damping element including a helical spring having a central cavity, the helical spring including a plurality of gaps in between adjacent coils, and a polymer located within the central cavity of the helical spring and in the gaps between adjacent coils.
A bone anchor system for stabilizing a plurality of bones, the system comprising:
- a first bone fixation element adapted to be secured to a first vertebrae;
- a second bone fixation element adapted to be secured to a second vertebrae;
- and
- a damping element sized and configured to be received by the first and second bone fixation elements, the damping element including a first spring element and a second element located inside the first spring element;
- wherein the first spring element is a helical spring having a central cavity, the helical spring element including a plurality of gaps in between adjacent coils, and the second element is sized and configured to be disposed within the gaps of the first spring element.
Dependencies are inferred from the claim text.