Double bundle ACL repair

• US 8,617,241 B2
• Filed: 03/31/2010
• Issued: 12/31/2013
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: IMDS LLC, Thomas Myers
• Original Assignee: IMDS Corporation, Thomas H. Myers
• Inventors: Myers, Thomas H.
• Primary Examiner(s): STEWART, ALVIN J
• Application Number:
  US12/751,072
• Publication Number:
  US 20100249930A1
• Time in Patent Office: 1,371 Days
• Field of Search: 623 1311- 132, 623/16.11, 606/99, 606/228, 606/232, 606/233, 606/321, 606/323
• US Class Current: 623/13.14
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1714 for applying tendons or ligaments implements for applying tendons or ligaments A61F2/0805
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/0404 Buttons
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors for applying suture clamps, clips or locks A61B2017/0488
• CPC Class Codes: A61B 2017/0414 having a suture-receiving opening, e.g. lateral opening lateral eyelet for attaching suture to needle A61B2017/06019
• CPC Class Codes: A61B 2017/0419 H-fasteners
• CPC Class Codes: A61B 2017/044 with a threaded shaft, e.g. screws
• CPC Class Codes: A61F 2/0805 Implements for inserting tendons or ligaments
• CPC Class Codes: A61F 2/0811 Fixation devices for tendons or ligaments
• CPC Class Codes: A61F 2002/0829 without deformation of anchor parts, e.g. fixation screws on bone surface, extending barbs, cams, butterflies, spring-loaded pins
• CPC Class Codes: A61F 2002/0852 Fixation of a loop or U-turn, e.g. eyelets, anchor having multiple holes
• CPC Class Codes: A61F 2002/0858 Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges
• CPC Class Codes: A61F 2002/0882 Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone
• CPC Class Codes: A61F 2002/0888 Anchor in or on a blind hole or on the bone surface without formation of a tunnel
• CPC Class Codes: A61F 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0082 parallelepipedal
• CPC Class Codes: A61F 2240/008 : Means for testing implantable prostheses

Abstract

A system for single tunnel, double bundle anterior cruciate ligament reconstruction includes implant constructs and instruments. The implant constructs provide a combination of cortical fixation and bone tunnel aperture fixation. The implant constructs separate a graft into distinct bundles. The instruments are used to prepare shaped bone tunnels to receive the implant constructs and graft bundles. Methods for reconstructing the antero-medial and postero-lateral bundles of the anterior cruciate ligament may rely on single femoral and tibial tunnels and a single strand of graft.

Claims

1. An implant for anterior cruciate ligament reconstruction, comprising:

a body extending along a longitudinal axis from a leading end to a trailing end, wherein a leading surface of the leading end comprises a cutout;

an aperture extending at least partially through the body transverse to the longitudinal axis, wherein the aperture is in connection with the cutout;

a first groove and a second groove extending generally parallel to the axis along a first pair of opposite sides of the body; and

a pair of concave indentations forming concave surfaces extending generally parallel to the axis along a second pair of opposite sides of the body, wherein the second pair of opposite sides is interposed with the first pair of opposite sides, and wherein a view of the body from the trailing end comprises a pair of open crescent-like portions in back-to-back relationship forming the pair of concave indentations having two convex portions on either side of the pair of concave indentations, wherein the first groove and the second groove comprise concave surfaces, and wherein the areas of the concave surfaces of the first and second grooves are greater than the areas of the concave surfaces of the pair of concave indentations.

2. The implant of claim 1, wherein the body comprises a porous material.

3. The implant of claim 1, wherein the body comprises a therapeutic agent.

4. The implant of claim 1, further comprising an aperture through the body.

5. The implant of claim 1, wherein, the body is adapted to be inserted into a hole extending along the axis from a first end to a second end and having a figure-eight-shaped cross section comprising a pair of enlarged lobes separated by a constricted middle section, and wherein, when the body is inserted into the hole, the pair of indentations congruently engage the constricted middle section.

6. The implant of claim 5, wherein a plurality of chambers are formed between the grooved first pair of opposite sides and the enlarged lobes.

7. The implant of claim 6, wherein, when the hole is formed in a bone so as to substantially occupy a natural attachment area of a natural anterior cruciate ligament to the bone, each chamber corresponds to a natural attachment area of a functional bundle of the anterior cruciate ligament to the bone.

8. An implant for anterior cruciate ligament reconstruction, comprising:

a body comprising a cross section projected along a longitudinal axis from a leading end to a trailing end, wherein a leading surface of the leading end comprises a cutout in connection with an aperture extending at least partially through the body transverse to the longitudinal axis;

wherein the body cross section comprises a pair of open crescent-like portions formed in back-to-back relationship forming a pair of concave indentations having concave surfaces, wherein the pair of concave indentations have two convex portions on either side of the pair of concave indentations, the body further comprising a pair of grooves interposed and parallel with the pair of indentations, the pair of grooves having concave surfaces, wherein the areas of the concave surfaces of the pair of grooves are greater than the areas of the concave surfaces of the pair of concave indentations;

wherein, the leading end of the body is adapted to be inserted into a hole comprising a cross section projected along the axis from a first end to a second end, wherein the hole cross section comprises a figure-eight shape having two enlarged portions arranged on opposite sides of a constricted middle portion, wherein, when the leading end of the body is inserted into the hole the body congruently engages the constricted middle portion and the crescent-like portions open toward the enlarged portions.

9. The implant of claim 8, wherein the body comprises a porous material.

10. The implant of claim 9, wherein the porous material comprises porous polyetheretherketone.

11. The implant of claim 8, wherein the body comprises a therapeutic agent.

12. The implant of claim 8, further comprising an aperture through the common central portion.

13. The implant of claim 8, wherein a pair of chambers are formed between the crescent-like portions and the enlarged portions.

14. The implant of claim 13, wherein, when the hole is formed in a bone so as to substantially occupy a natural attachment area of a natural anterior cruciate ligament to the bone, each chamber corresponds to a natural attachment area of a bundle of the anterior cruciate ligament to the bone.