Method and system for toe arthroplasty

• US 20060247787A1
• Filed: 06/25/2004
• Published: 11/02/2006
• Est. Priority Date: 06/27/2003
• Status: Abandoned Application

• Current Assignee: Advanced Bio Surfaces, Inc.
• Original Assignee: Advanced Bio Surfaces, Inc.
• Inventors: McGarvey, Scott, Felt, Jeffrey C., Rydell, Mark A.
• Application Number:
  US10/562,651
• Publication Number:
  US 20060247787A1
• Time in Patent Office: Days
• US Class Current: 623/21.110
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1682 for the foot or ankle
• CPC Class Codes: A61B 17/562 Implants for placement in joint gaps without restricting joint motion, e.g. to reduce arthritic pain
• CPC Class Codes: A61B 17/8872 Instruments for putting said fixation devices against or away from the bone A61B17/7074, A61B17/808 take precedence
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 50/33 Trays
• CPC Class Codes: A61B 90/00 Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges protective face masks A41D13/11; surgeon's or patient's gowns or dresses A41D13/12; devices for carrying-off, for treatment of, or for carrying-over, body liquids A61M1/00
• CPC Class Codes: A61B 90/90 Identification means for patients or instruments, e.g. tags
• CPC Class Codes: A61F 2/0095 Packages or dispensers for prostheses or other implants for intraocular lenses A61F2/1691; for dental surgery A61C19/02
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/4202 for ankles
• CPC Class Codes: A61F 2/4225 for feet, e.g. toes
• CPC Class Codes: A61F 2/4606 of wrists or ankles; of hands, e.g. fingers; of feet, e.g. toes
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30148 lozenge- or diamond-shaped
• CPC Class Codes: A61F 2002/30563 having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30576 : with extending fixation tabs
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3071 : Identification means; Administration of patients
• CPC Class Codes: A61F 2002/30754 : Implants for interposition between two natural articular surfaces
• CPC Class Codes: A61F 2002/3082 : Grooves
• CPC Class Codes: A61F 2002/30881 : Circumferential ribs, flanges or fins
• CPC Class Codes: A61F 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/4207 : Talar components
• CPC Class Codes: A61F 2002/4215 : Lateral row of tarsal bones
• CPC Class Codes: A61F 2002/4233 : for metatarso-phalangeal joints, i.e. MTP joints
• CPC Class Codes: A61F 2002/4622 : having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2002/4627 : with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4658 : for measuring dimensions, e.g. length
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2250/0085 : Identification means; Administration of patients
• CPC Class Codes: A61F 2310/00365 : Proteins; Polypeptides; Degradation products thereof
• CPC Class Codes: A61L 2430/02 : for reconstruction of bones; weight-bearing implants
• CPC Class Codes: A61L 27/18 : obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08L 75/04 : Polyurethanes

Abstract

A system for the creation or modification of an orthopedic joint within a mammalian body is disclosed. The system includes an implant (122, 132, 232, 332, 432) that provides a major surface adapted to be positioned against a metatarsal bone and an end (136, 236, 336, 436) adapted to be retained within a phalange.

Claims

1. A system for the creation or modification of an othropedic joint within a mammalian body, the system comprising a polymeric implant that provides a major surface adapted to be positioned against a metatarsal bone and an end adapted to be retained within a phalange.

2. An implant in accordance with claim 1 wherein the implant comprises a body and a shank.

3. An implant in accordance with claim 2 wherein the implant includes a means for stabilization.

4. An implant in accordance with claim 3 wherein the means for stabilization include barbs.

5. An implant in accordance with claim 3 wherein the means for stabilization include sharp points.

6. An implant in accordance with claim 3 wherein the means for stabilization include splines.

7. An implant in accordance with claim 3 wherein the means for stabilization include diamond patterns.

8. An implant in accordance with claim 1 wherein the implant comprises a biomaterial.

9. An implant in accordance with claim 8 wherein the biomaterial comprises a polyurethane.

10. An implant according to claim 9 wherein the polyurethane is biocompatible with respect to cytotoxicity, sensitization, genotoxicity, chronic toxicity, and carcinogenicity.

11. An implant according to claim 9 wherein polyurethane has a Shore hardness of at least about 60 D or less.

19. A method of repairing a metatarsophalangeal joint, comprising the steps of providing and implanting according to claim 1.

20. A metatarsophalangeal joint that includes an implant according to claim 1.

12. A kit for a positional arthroplasty system, the kit comprising:

a) an implant that provides a major surface adapted to be positioned against a metatarsal bone and an end adapted to be retained within a phalange, and

b) one or more devices adapted to perform one or more steps selected from the group consisting of preparing the joint to receive an implant, determining an appropriate implant size for a particular joint, inserting the implant into the joint, and/or securing the implant to a desired extent.

13. A kit according to claim 12 wherein the kit includes a includes an impactor.

14. A kit according to claim 12 wherein the kit includes a reamer.

15. A kit according to claim 12 wherein the kit includes a depth stop.

16. A kit according to claim 12 wherein the kit includes a bone smoother.

17. A kit according to claim 16 wherein the smoother is fenestrated.

18. A kit according to claim 12 wherein the kit includes a diameter gauge.

21. A kit comprising a tool useful for preparing a joint to receive an implant, an apparatus useful for determining an appropriate implant size for the joint, an apparatus useful for determining an appropriate implant thickness, and a tool useful for inserting the implant into the joint and/or securing the implant to a desired extent.

22. A device for implantation into a toe joint space within the body of a mammal, the device comprising a composite or monolith structure fabricated from a biocompatible, biodurable material that is adapted to be inserted into the joint compartment.

23. A device according to claim 22 wherein the implanted device is substantially free of anchoring portions that need to be attached to the bone, cartilage, ligaments or other tissue, yet by its design is capable of being used with minimal translation, rotation, or other undesired movement or dislocation within or from the joint space.

24. A device according to claim 23 wherein stability of the device within the joint space is provided by the fixation/congruency of the device to the one or the other of the two joint members.