PUSH-OFF DRIVER AND METHOD FOR INSERTING BONE SCREWS
7 Assignments
0 Petitions
Accused Products
Abstract
A method and device for inserting screws into a patient, such that when the device is removed the device does not stick to the screw. The device, being a push-off driver, may have a handle, an inner driver, and a threaded driver sleeve having a button mechanism and a plurality of spheres, and an inner sleeve. The method includes the steps of assembling a push-off driver attaching a bone screw to the push-off driver inserting the bone screw and detaching the bone screw from the driver by unthreading the threaded driver sleeve from the polyaxial screw which causes the spheres in the recess of the inner driver to back up against the start of the recess and causing the threaded driver sleeve to “push-off” the polyaxial screw from the inner driver.
2 Citations
42 Claims
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1-22. -22. (canceled)
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23. A method of releasing a driver from a bone screw, the method comprising the steps of:
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assembling a driver comprising; a driver sleeve; an inner driver moveable inside the driver sleeve having a drive structure to drive the bone screw, inserting the inner driver through a central channel of the driver sleeve such that a cross-pin provided at a distal end of the inner driver is accessible when the inner driver is coupled to a bone screw; and attaching the bone screw to the driver sleeve and inner driver by engaging the cross-pin with a head of the bone screw to prevent rotation of the bone screw when attaching to the driver sleeve; inserting the bone screw into a patient; and detaching the driver from the bone screw by unthreading the driver sleeve from the bone screw. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification