Textured driver tip device and methods
AssigneeAcumed LLC
InventorsBrayden Reiland, Travis Sewell, Steve Crawford
Life of this patent
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Abstract
A driver has improved “stick fit” with a head of a bone screw. The driver may include a tip portion defining a central axis and may include an external surface. At least a portion of the external surface may be symmetrical about the central axis. The tip portion may include at least one ridge extending from the external surface. The at least one ridge may provide an interference fit with an internal recess of a screw.
Claims20
A medical instrument configured to be mated with an implant or fixation device, the instrument comprising:
- a mating portion configured to mate with the implant or fixation device, the mating portion defining a central axis and comprising an external surface extending circumferentially around the central axis,
- wherein at least a portion of the external surface is symmetrical about the central axis, and
- wherein the mating portion further comprises at least one ridge contiguous with the external surface and extending from the external surface in a direction transverse to the central axis.
A method of screw insertion using a driver, wherein the driver comprises a tip portion configured to mate with a bone screw, the tip portion defining a central axis and comprising an external surface, wherein the tip portion further comprises at least one ridge extending from and contiguous with the external surface and wherein the at least one ridge is transverse to the central axis, the method comprising:
- aligning the driver against a recess of the bone screw;
- inserting the tip portion into the recess of the bone screw by applying a predetermined axial force, wherein the at least one ridge creates multiple contact points with internal features of the recess of the bone screw to establish an interference fit between the driver and the bone screw;
- positioning the bone screw at an entry point on a bone surface;
- and
- applying a rotational force to the driver.
Dependencies are inferred from the claim text.