Self-retaining screw and screwdriver

Patent metadata

Field	Value
Publication number	US-11517362-B2
Application number	US-202016863586-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	Apr 30, 2020
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A bone screw insertion device, comprises an outer sleeve extending from a proximal end to a distal end and including a channel extending therethrough and a driving member extending longitudinally through the channel of the outer sleeve from a proximal end to a distal end configured to engage a driving recess of a bone screw, the outer sleeve movable relative to the driving member between a first position in which the distal end of the outer sleeve extends over and covers a proximal portion of a bone screw engaged with the driving member, to a second position in which the distal end of the outer sleeve is longitudinally aligned with a proximal end of a bone screw engaged with the driving member.

First claim

What is claimed is:

1. A system for treating a bone, comprising:
a headless screw extending from a proximal end to a distal end and including a threading extending along an outer surface thereof, the headless screw including a driving recess extending into the proximal end thereof; and
an insertion device including an outer sleeve extending from a proximal end to a distal end and including a channel extending therethrough, a driving member extending longitudinally through the channel of the outer sleeve from a proximal end to a distal end, the proximal end of the driving member extending proximally of the proximal end of the outer sleeve to a distal end configured to engage the driving recess of the headless screw to rotationally drive the headless screw into a bone, the outer sleeve movable relative to the driving member between a first position, in which the distal end of the outer sleeve extends over and covers a proximal portion of the headless screw when the headless screw is engaged with the driving member in an operative configuration, to a second position, in which a distal end of the outer sleeve is longitudinally aligned with a proximal end of the headless screw,
wherein the outer sleeve includes a locking mechanism for locking the outer sleeve relative to the driving member in one of the first and second positions, the locking mechanism including a locking tab biased toward a locking configuration via a biasing element and a push button compressing the biasing element to move the locking tab toward an unlocked configuration.

2. The system of claim 1 , wherein the headless screw further includes a retaining recess extending distally from the driving recess.

3. The system of claim 2 , wherein the insertion device further includes a retaining member extending longitudinally through a channel of the driving member from a proximal end to a distal end configured to engage the retaining recess so that the headless screw is retained on the insertion device during insertion of the headless screw into the bone.

4. The system of claim 3 , wherein the retaining recess includes a threading therealong and the distal end of the retaining member is correspondingly threaded so that, rotation of the retaining member about a longitudinal axis thereof relative to the driving member, engages the threading of the retaining member with the threading of the retaining recess to retain the headless screw on the insertion device.

5. The system of claim 4 , wherein the proximal end of the retaining member includes a knob extending proximal of the proximal end of the driving member to rotate the retaining member relative to the driving member.

6. The system of claim 1 , wherein the driving member includes a first groove extending into an outer surface of the driving member so that when the locking tab is received within the first groove the outer sleeve is in the first position relative to driving member, and a second groove extending into the outer surface of the driving member proximal of the first groove so that when the locking tab is received within the second groove the outer sleeve is in the second position relative to the driving member.

7. The system of claim 1 , wherein a core diameter of the proximal portion of the headless screw is larger than a core diameter along a remaining portion of the headless screw.

8. The system of claim 1 , wherein the outer sleeve includes gripping features extending distally from the distal end thereof, the gripping features configured to engage the bone.

9. The system of claim 1 , wherein the outer sleeve includes a threading along the distal end thereof configured to engage a corresponding threading along the proximal portion of the headless screw.

10. The system of claim 9 , wherein the outer sleeve includes a proximal portion and a distal portion connected to one another via a friction interface, the distal portion being rotatable about a longitudinal axis thereof.

11. The system of claim 10 , wherein the proximal portion of the outer sleeve includes a mating feature configured to mate with a corresponding mating feature on the driving member to prevent the proximal portion from rotating relative to the driving member.

12. The system of claim 10 , wherein the proximal portion of the outer sleeve includes a depth indicator that indicates a depth to which the headless screw has been inserted into the bone.

13. A bone screw insertion system, comprising:
an outer sleeve extending from a proximal end to a distal end and including a channel extending therethrough; and
a driving member extending longitudinally through the channel of the outer sleeve from a proximal end to a distal end configured to engage a driving recess of a bone screw, the outer sleeve movable relative to the driving member between a first position in which the distal end of the outer sleeve extends over and covers a proximal portion of a bone screw engaged with the driving member, to a second position in which the distal end of the outer sleeve is longitudinally aligned with a proximal end of a bone screw engaged with the driving member,
wherein the outer sleeve includes a locking mechanism for locking the outer sleeve relative to the driving member in one of the first and second positions, the locking mechanism including a locking tab biased toward a locking configuration via a biasing element and a push button compressing the biasing element to move the locking tab toward an unlocked configuration.

14. The system of claim 13 , further comprising a retaining member extending longitudinally through the channel of the driving member from a proximal end to a distal end, the retaining member being configured to releasably engage a retaining recess of a bone screw.

15. The system of claim 14 , wherein the distal end of the retaining member is threaded to engage a corresponding threading of the retaining recess.

16. The system of claim 15 , wherein the proximal end of the retaining member includes a knob extending proximal of the proximal end of the driving member to rotate the retaining member relative to the driving member.

17. The system of claim 13 , wherein the driving member includes a first groove extending into an outer surface of the driving member so that when the locking tab is received within the first groove the outer sleeve is in the first position relative to driving member, and a second groove extending into the outer surface of the driving member proximal of the first groove so that when the locking tab is received within the second groove the outer sleeve is in the second position relative to the driving member.

18. The system of claim 13 , wherein the outer sleeve includes gripping features extending distally from the distal end thereof, the gripping features configured to engage the bone.

19. The system of claim 13 , wherein the outer sleeve includes a threading along an inner surface of a distal portion thereof configured to engage a corresponding threading along the proximal portion of a headless screw received within the outer sleeve.

20. The system of claim 19 , wherein the outer sleeve includes a proximal portion and a distal portion connected to one another via a friction interface, the distal portion of the outer sleeve being rotatable about a longitudinal axis thereof relative to the proximal portion of the outer sleeve.

21. The system of claim 20 , wherein the proximal portion of the outer sleeve includes a mating feature configured to mate with a corresponding mating feature on the driving membe

Assignees

• Depuy Synthes Products Inc

Inventors

• Spreiter Gregor
• Défossez Henri
• Scherrer Simon
• El Zoghbi Gaser
• Koch Roger
• Schumacher Yvonne
• Rapier Rhett

Classifications

• A61B17/8894

  holding the implant into or through which the screw is to be inserted (A61B17/7082, A61B17/7091 take precedence) · CPC title

• A61B17/8615

  at the central region of the screw head · CPC title

• A61B17/8888 Primary

  at its central region · CPC title

• A61B2090/062

  penetration depth · CPC title

• A61B17/8645 Primary

  Headless screws, e.g. ligament interference screws · CPC title