Soft tissue retention devices, instrumentation and related methods
Soft tissue retention devices, instrumentation and related methods are disclosed. The devices include a first member comprising a first head portion and a first threaded shaft portion extending from the first head portion that define a cannulated opening extending therethrough, and a second member comprising a second head portion and a second threaded shaft portion extending from the second head portion that define a cannulated opening that extends therethrough. The inner sides of the first and second head portions includes a row of teeth extending about the periphery thereof. The first head portion also includes a plurality of through holes positioned between the first threaded shaft portion and the row of teeth. The outer sides of the first and second head portions include non-circular drive openings. The instrumentation comprise a handle portion with a through aperture that allows for a user's finger to extend therethrough during an implantation procedure.
1. A device for retaining soft tissue to a bone, the device comprising:
a first member comprising a first head portion and a first threaded shaft portion extending from an inner side of the first head portion, the first head portion and the first threaded shaft portion defining a cannulated opening that extends through the first member; and
a second member comprising a second head portion and a second threaded shaft portion extending from an inner side of the second head portion, the second head portion and the second threaded shaft portion defining a cannulated opening that extends through the second member,
wherein the inner side of the first head portion comprises a row of teeth extending about the periphery of the first head portion and a plurality of through holes positioned between the first threaded shaft portion and the row of teeth that extend to an outer side of the first head portion that opposes the inner side thereof,
wherein the first and second threaded shaft portions are configured to threadably engage with each other,
wherein the outer side of the first head portion includes a first drive opening that is non-circular in cross-section, and
wherein the inner side of the second head portion comprises a row of angled teeth extending about the periphery of the second head portion and an outer side of the second head portion that opposes the inner side thereof includes a second drive opening that is non-circular in cross-section.
2. The device of claim 1 , wherein the cannulated opening of the first member is aligned with and extends from the first drive opening.
3. The device of claim 1 , wherein the cannulated opening of the second member is aligned with and extends from the second drive opening.
4. The device of claim 1 , wherein the first head portion comprises a convex outer surface profile.
5. The device of claim 1 , wherein the second head portion comprises a convex outer surface profile.
6. The device of claim 1 , wherein the row of angled teeth of the inner side of the second head portion are angled in a direction extending about an axis of the cannulated opening of the second member that opposes a loosening direction of the threads of the first threaded shaft portion with respect to the second threaded shaft portion.
7. The device of claim 6 , wherein an outer surface of the row of angled teeth of the inner side of the second head portion define the outer peripheral surface of the second head portion.
8. The device of claim 7 , wherein the outer surface of the row of angled teeth of the inner side of the second head portion extend parallel to the axis of the cannulated opening of the second member.
9. The device of claim 1 , wherein the teeth of the row of teeth of the inner side of the first head portion define axes that are aligned with an axis of the cannulated opening of the first member.
10. The device of claim 9 , wherein an outer surface of the teeth of the row of teeth of the inner side of the first head portion are angled toward the axis of the cannulated opening of the first member as they extend to a tip of the teeth.
11. The device of claim 10 , wherein an inner surface of the teeth of the row of teeth of the inner side of the first head portion are angled away from the axis of the cannulated opening of the first member as they extend from the inner surface to the tip of the teeth.
12. The device of claim 1 , wherein the teeth of the row of teeth of the inner side of the first head portion taper as they extend from the inner surface to the tip of the teeth.
13. The device of claim 1 , wherein the inner side of the first head portion comprises only a single row of teeth.
14. The device of claim 1 , wherein the inner side of the first head portion is convex.
15. The device of claim 1 , wherein the inner side of the second head portion is convex.
16. The device of claim 1 , wherein the plurality of through holes are spaced about an axis of the cannulated opening of the first member.
17. The device of claim 1 , wherein the first threaded post portion is externally threaded, and the second threaded post portion is internally threaded in the cannulated opening thereof.
18. The device of claim 1 , wherein the second threaded post portion is externally threaded, and the first threaded post portion is internally threaded in the cannulated opening thereof.
19. The device of claim 1 , wherein the first member and the second member are of one-piece construction.
20. The device of claim 1 , wherein the first head portion and the first threaded shaft portion are separate and distinct components that are coupled together.
21. The device of claim 20 , wherein the first head portion is movably coupled with the first threaded shaft portion such that the first head portion comprises up to about 15 degrees of variation of an angle between an axis of the first threaded shaft portion and a plane defined by the first head portion.