Locking mechanism to secure ends of an implantable band

Patent metadata

Field	Value
Publication number	US-10058364-B2
Application number	US-201214128862-A
Country	US
Kind code	B2
Filing date	Jun 29, 2012
Priority date	Jun 29, 2011
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A locking mechanism for securing ends of an implantable fabric including a plate member having an aperture therethrough. A cam member is rotatable relative to the aperture between a locked state and an unlocked state. The implantable fabric is movable relative to the plate member when the cam member is in the unlocked state and restricted from moving relative to the plate member when the cam member is in the locked state.

First claim

What is claimed is:

1. A surgically implantable device for securing first and second portions of a surgically implantable band, the device comprising:
a surgically implantable plate including a first aperture extending therethrough and a retaining member extending radially into the first aperture, the retaining member at least partially defining a second aperture in communication with the first aperture, the first and second portions of the band extending through the first aperture radially outside of the second aperture; and
a surgically implantable cam member received in the first aperture between the first and second portions and engaging threads of the second aperture for rotation relative thereto between an unlocked state in which at least one of the first and second portions is allowed to move relative to the plate and a locked state in which a clamping force between the plate and the cam member restricts movement of the at least one of the first and second portions relative to the plate, wherein the plate and the cam define a gap sized to receive the band and rotation of the cam relative to the plate from the unlocked state to the locked state cause a width of the gap to reduce.

2. The surgically implantable device of claim 1 , wherein both of the first and second portions are allowed to move relative to the plate in the unlocked state and both of the first and second portions are clamped between the plate and the cam member in the locked state.

3. The surgically implantable device of claim 1 , wherein the first and second portions are clamped radially between a radially outermost surface of the cam member and a diametrical surface defining the outer periphery of the first aperture.

4. The surgically implantable device of claim 1 , wherein the first and second portions are clamped between a first surface of the plate that is substantially perpendicular to a longitudinal axis of the first aperture and a second surface of the cam member that is substantially parallel to the first surface.

5. The surgically implantable device of claim 1 , wherein the retaining member includes a pair of cantilevered fingers extending radially inward toward each other and defining the second aperture therebetween.

6. The surgically implantable device of claim 1 , wherein the retaining member includes a single cantilevered member including a stem portion and a loop portion disposed at a radially innermost end of the stem portion, the loop portion defining the second aperture.

7. The surgically implantable device of claim 1 , wherein the first and second apertures share a common longitudinal axis.

8. The surgically implantable device of claim 1 , wherein the cam member includes a central hub portion and a rim portion extending radially outward from the hub portion, the hub portion engaging the threads of the second aperture, the rim portion directly engaging the band in the locked state.

9. The surgically implantable device of claim 1 , wherein the plate includes a body portion and a plurality of legs extending outward therefrom, the first aperture extending through the body portion, each of the plurality of legs including a third aperture extending therethrough and adapted to receive a fastener for securing the plate to bodily tissue.

10. The surgically implantable device of claim 1 , wherein the plate includes a hard stop extending radially into to the first aperture and preventing rotation of the cam member in one rotational direction when the cam member is in the locked state.

11. The surgically implantable device of claim 1 , wherein the cam member includes a pair of cutouts disposed radially opposite each other and extending radially outward through a radial periphery of the cam member, the cutouts extending through an entire axial thickness of the cam member.

12. The surgically implantable device of claim 11 , wherein the cam member includes a pair of threaded peripheral surfaces separated from each other by the cutouts, the threads of the threaded peripheral surfaces directly engaging the first and second portions of the band in the locked state to restrict movement of the first and second portions.

13. The surgically implantable device of claim 1 , wherein the band is formed from a flat and elongated woven material.

14. A locking mechanism for securing a surgically implantable band, the locking mechanism comprising:
a surgically implantable plate member having an aperture extending therethrough and a pair of retaining fingers extending into the aperture and each defining a respective gap between an end of each retaining finger and the plate member, the gaps each having a width that is smaller than a thickness of the implantable band and receiving the implantable band therein; and
a surgically implantable cam member rotatably received within the aperture and rotatable between an unlocked state and a locked state, wherein rotation from the unlocked state to the locked state reduces a width of the gaps restricting movement of the band relative to the plate member.

15. The locking mechanism of claim 14 , wherein the retaining fingers are configured to rotatably receive the cam member.

16. The locking mechanism of claim 15 , wherein the cam member includes an outwardly extending rim for securing the cam member within the retaining fingers.

17. The locking mechanism of claim 14 , wherein the plate member includes a pair of hard stops proximate to the aperture and operable to prevent rotation of the cam member beyond a predetermined angle.

18. The locking mechanism of claim 14 , wherein the aperture is threaded.

19. The locking mechanism of claim 18 , wherein the outer profile of the cam member includes a tooth profile matingly received by the aperture.

20. The locking mechanism of claim 19 , wherein the cam member includes a plurality of cutouts that receive the band.

21. The locking mechanism of claim 19 , wherein the tooth profile engages the band when the cam member is in the locked state.

22. The locking mechanism of claim 14 , wherein the cam member includes a flange at an upper surface thereof that engages the band when the cam member is in the locked state.

23. The locking mechanism of claim 14 , wherein the gaps receive opposite ends of the band therein.

24. The locking member of claim 14 , further comprising a retaining element extending into each of the gaps and operable to engage the band at respective ends thereof, the retaining elements permitting movement of the hand in a first direction when the cam member is in the unlocked state and restricting movement of the band in a second direction, opposite the first direction, when the cam member is in the unlocked state.

25. The locking member of claim 14 , wherein the plate includes a body portion and a plurality of legs extending outward therefrom, the aperture extending through the body portion, each of the plurality of legs including a mounting aperture extending therethrough and adapted to receive a fastener for securing the plate to bodily tissue.

26. The surgically implantable device of claim 14 , wherein the band is formed from a flat and elongated woven material.

27. The surgically implantable device of claim 1 , wherein the cam member is configured to rotate about an axis extending transverse to the plate.

Assignees

• Garcia Saddy R
• Zimmer Biomet Cmf & Thoracic Llc

Inventors

• Garcia Saddy R

Classifications

• A61B17/8076

  for the ribs or the sternum · CPC title

• A61B17/842

  Flexible wires, bands or straps (A61B17/72, A61B17/82, A61B17/86 take precedence) · CPC title

• A61B17/80

  Cortical plates {, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates} · CPC title

• A61B17/823 Primary

  for the sternum · CPC title