Bone repair device and method
AssigneesAesculap AG, University of Utah Research Foundation
InventorsJoel MacDonald, Jonathan Rose
Life of this patent
Estimating the term…
Abstract
A device for repairing a bone disorder using a polyaxial screw. The device has a pivoted lever mounted rotatably to an extension of a bone screw and which extends essentially at right angles to the longitudinal direction of the extension to which it is mounted and is in contact with a stop on the other extension associated with the vertebral body to be repositioned. The extension that acts on the polyaxial bone screw comprises a longitudinal sleeve, a rod, preferably threaded, extending from within the sleeve and moveable within the sleeve, and a contact surface disposed on the end of the threaded rod which is configured to transmit a force against the bone screw to prevent polyaxial movement of the polyaxial bone screw for as long as the force is transmitted.
Claims21
A device for repairing a bone disorder using a polyaxial bone screw comprising:
- a longitudinal sleeve;
- a rod having an end, the rod extending from within the longitudinal sleeve and moveable within the longitudinal sleeve;
- and
- a contact surface disposed on the end of the rod which is configured to transmit a force against a bone screw to prevent movement of the polyaxial bone screw for as long as the force is transmitted.
A fixation device for repairing a bone disorder, the fixation device having at least one polyaxial bone screw that can be screwed into the vertebral body to be repositioned and at least one other bone screw that can be screwed into an adjacent bone, which bone screws are connected with one another in an articulated manner by means of a cross strut, the bone screws having extensions which extend in their longitudinal direction, the extensions having free ends and opposite ends that act on the bone screws with a tightening device that applies a tensile force on one of the two bone screws, wherein the tightening device has a pivoted lever mounted rotatably to an extension of one of the bone screws and which extends essentially at right angles to the longitudinal direction of the extension to which it is mounted and is in contact with a stop on the other extension associated with the vertebral body to be repositioned, characterized in that:
- the extension that acts on the at least one polyaxial bone screw comprises:
- a longitudinal sleeve;
- a rod having an end, the rod extending from within the sleeve and moveable within the sleeve;
- and
- a contact surface disposed on the end of the rod which is configured to transmit a force against the polyaxial bone screw to prevent polyaxial movement of the polyaxial bone screw for as long as the force is transmitted.
A method for repairing a spinal disorder comprising:
- inserting a polyaxial screw into a vertebral bone, the polyaxial screw comprised of a screw and a cap;
- applying a force on the head of the polyaxial screw to prevent polyaxial rotation of the screw with respect to the cap;
- adjusting the vertebra having the screw with respect to an adjacent vertebrae;
- removing the force on the head of the polyaxial screw to allow polyaxial rotation of the cap with respect to the screw;
- and
- securing a rod to the polyaxial screw cap to thereby fix the repositioned vertebrae.
A method for repairing a spinal disorder comprising:
- inserting a polyaxial screw into a vertebral bone, the polyaxial screw comprised of a screw and a cap;
- applying a force on the head of the polyaxial screw to prevent polyaxial rotation of the screw with respect to the cap;
- adjusting the vertebra having the screw with respect to an adjacent vertebrae;
- securing a rod to the polyaxial screw cap to thereby fix the repositioned vertebrae;
- and
- removing the force on the head of the polyaxial screw to allow polyaxial rotation of the cap with respect to the screw.
Dependencies are inferred from the claim text.