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US 2023/0346444 A1Published application
Retaining Driver System
AssigneeNexus Spine, LLC
InventorsDaniel Manwill, David Waller
Life of this patent
Estimating the term…
Abstract
Systems and methods for providing and using improved retaining drivers and screws. An undercut feature of the bone screw allows a corresponding selectively protruding retaining feature of the driver engage the undercut feature to retain the bone screw on the driver until selectively released.
Claims20
A retaining driver for bone screws comprising:
- a shaft comprising a proximal end and a distal end;
- an elongate channel extending within the shaft from distal end toward the proximal end;
- a retaining tip on the distal end of the shaft, wherein the retaining tip comprises:
- a geometric profile adapted to permit transference of rotational torque to a corresponding geometric profile of a bone screw;
- a window formed on a side of the retaining tip and forming a passage communicating with the elongate channel;
- and
- a retaining element disposed within the passage and sized to be able to protrude from the window but not pass entirely through the window;
- and
- an elongate actuator at least partially and movingly disposed within the elongate channel, the elongate actuator comprising a distal shape that displaces the retaining element axially outward in the passage to protrude through the window when the elongate actuator is advanced distally in the elongate channel and which permits the retaining element to move axially inward in the passage when the elongate actuator is displaced proximally within the elongate channel.
6 more elements
A retaining driver system comprising:
- a bone screw comprising:
- a threaded shaft having a proximal end and a distal tip;
- a screw head extending proximally from the proximal end of the threaded shaft;
- a drive feature extending distally into the screw head from a drive feature opening, the drive feature comprising:
- a geometric profile adapted to receive transference of rotational torque when driving the bone screw into bone or when removing the bone screw from bone;
- and
- an undercut feature dispose within the drive feature distally from the drive feature opening, such that a diameter of the drive feature distal the drive feature opening is greater than a diameter of the drive feature opening directly proximate the undercut feature;
- a retaining driver comprising:
- a shaft comprising a proximal end and a distal end;
- an elongate channel extending within the shaft from distal end toward the proximal end;
- a retaining tip on the distal end of the shaft, wherein the retaining tip comprises:
- a geometric profile adapted to permit transference of rotational torque to the geometric profile of the bone screw;
- a window formed on a side of the retaining tip so as to be aligned with the undercut feature of the bone screw when the retaining tip is fully inserted into the drive feature of the bone screw, the window forming a passage communicating with the elongate channel;
- and
- a retaining element disposed within the passage and sized to be able to protrude from the window but not pass entirely through the window;
- and
- an elongate actuator at least partially and movingly disposed within the elongate channel, the elongate actuator comprising a distal shape that displaces the retaining element axially outward in the passage to protrude through the window when the elongate actuator is advanced distally in the elongate channel and which permits the retaining element to move axially inward in the passage when the elongate actuator is displaced proximally within the elongate channel.
14 more elements
A retaining driver system comprising:
- a bone screw comprising:
- a threaded shaft having a proximal end and a distal tip;
- a screw head extending proximally from the proximal end of the threaded shaft;
- a hexalobe drive feature extending distally into the screw head from a drive feature opening, the hexalobe drive feature comprising:
- a hexalobe profile adapted to receive transference of rotational torque when driving the bone screw into bone or when removing the bone screw from bone;
- and
- an undercut feature dispose within the hexalobe drive feature distally from the drive feature opening, such that a diameter of the drive feature distal the drive feature opening is greater than a diameter of the drive feature opening directly proximate the undercut feature;
- a retaining driver comprising:
- a shaft comprising a proximal end and a distal end;
- an elongate channel extending within the shaft from distal end toward the proximal end;
- a retaining tip on the distal end of the shaft, wherein the retaining tip comprises:
- a hexalobe profile adapted to permit transference of rotational torque to the hexalobe drive feature of the bone screw;
- a window formed on a side of the retaining tip so as to be aligned with the undercut feature of the bone screw when the retaining tip is fully inserted into the drive feature of the bone screw, the window forming a passage communicating with the elongate channel;
- and
- a retaining element disposed within the passage and sized to be able to protrude from the window but not pass entirely through the window;
- and
- an elongate actuator at least partially and movingly disposed within the elongate channel, the elongate actuator comprising a distal shape that displaces the retaining element axially outward in the passage to protrude through the window when the elongate actuator is advanced distally in the elongate channel and which permits the retaining element to move axially inward in the passage when the elongate actuator is displaced proximally within the elongate channel.
14 more elements
Dependencies are inferred from the claim text.