High tibial osteotomy (HTO) wedge

• US 20030105526A1
• Filed: 11/26/2002
• Published: 06/05/2003
• Est. Priority Date: 11/30/2001
• Status: Abandoned Application

• Current Assignee: AMER Technology Limited (AMER International Group Company Limited)
• Original Assignee: AMER Technology Limited (AMER International Group Company Limited)
• Inventors: Waite, Alina M., Bryant, Richard M.
• Application Number:
  US10/304,231
• Publication Number:
  US 20030105526A1
• Time in Patent Office: Days
• US Class Current: 623/16.11
• CPC Class Codes: A61B 17/8095 Wedge osteotomy devices
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/2892 Tibia
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30158 trapezoidal
• CPC Class Codes: A61F 2002/30187 D-shaped or half-disc-shaped
• CPC Class Codes: A61F 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30324 differing in thickness
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3079 Stepped or enlarged apertures, e.g. having discrete diameter changes
• CPC Class Codes: A61F 2002/30878 with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0026 trapezoidal
• CPC Class Codes: A61F 2230/0034 : D-shaped
• CPC Class Codes: A61F 2230/0082 : parallelepipedal
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite
• CPC Class Codes: A61F 2310/00341 : Coral, e.g. aragonite, porite

Abstract

A device and a method for performing a high tibial osteotomy repair is disclosed. The osteotomy device may have the general configuration of a horseshoe-shaped wedge. The device is inserted into an osteotomy site after the tibia is realigned. The device generally conforms to the anatomical cross section of the tibia and thereby enhances weight bearing on the extremity in a postoperative recovery period. The device may also accommodate the stem of a knee replacement prosthesis. The method for correcting tibial deformities includes using a wedge-shaped body composed of various materials and having variable thickness and angulation to fill a gap in the tibia created by an osteotomy.

Claims

1. An osteotomy device comprising;

a modified horseshoe-shaped body of variable thickness;

the body variably angulated from front to back;

the thickness and angulation of the body selected to allow insertion into a generally wedge-shaped osteotomy site; and

the modified horseshoe-shape operable to accommodate a stem of a knee replacement prosthesis through a central opening.

2. The osteotomy device of claim 1 further comprising material selected from the group consisting of stainless steel, titanium, cobalt chrome, ceramics and composites or an open-cell configuration material such as coral or sponge or any combination thereof.

3. The osteotomy device of claim 2 further comprising material selected from the group consisting of hydroxyapatite or another biocompatible material.

4. The osteotomy device of claim 1 further comprising material selected from the group consisting of a biodegradable, bioerodable or bioresorbable material.

5. The osteotomy device of claim 1 further comprising a material selected from the group consisting of polymers or copolymers of lactide, glycolide, caprolactone, polydioxanone, trimethylene carbonate, polyorthoesters and polyethylene oxide or any combination thereof.

6. The osteotomy device of claim 1 further comprising a weight-bearing material.

7. The osteotomy device of claim 1 further comprising a body having a variable thickness ranging from five millimeters to twenty millimeters.

8. The osteotomy device of claim 1 further comprising a body of variable angulation.

9. An osteotomy device comprising;

a generally asymmetrical U-shaped body of variable thickness;

the body having variable angulation from front to back; and

the body operable to be inserted horizontally into a wedge-shaped osteotomy site.

10. The osteotomy device of claim 9 further comprising stainless steel, titanium, cobalt chrome, ceramics and composites or an open-cell configuration material such as coral or sponge or any combination thereof.

11. The osteotomy device of claim 9 further comprising hydroxyapatite or another biocompatible material.

12. The osteotomy device of claim 9 further comprising a biodegradable, bioerodable or bioresorbable material.

13. The osteotomy device of claim 9 wherein said biodegradable, bioresorbable or bioerodable material comprises material selected from the group consisting of polymers or copolymers of lactide, glycolide, caprolactone, polydioxanone, trimethylene carbonate, polyorthoesters and polyethylene oxide or any combination thereof.

14. The osteotomy device of claim 9 further comprising a weight-bearing material.

15. The osteotomy device of claim 9 further comprising a body of variable thickness ranging from five millimeters to twenty millimeters.

16. A method for correcting tibial deformities comprising:

forming an osteotomy in a bone;

filing a gap in the bone created by an osteotomy with a modified horseshoe-shaped wedge; and

attaching the wedge to at least one portion of the bone.

17. The method of claim 16 comprising using one screw to attach the wedge to a tibia.

18. The method of claim 16 comprising using two screws to attach the wedge to a tibia.

19. The method of claim 16 comprising inserting a bone pin through an opening in the wedge.

20. The method of claim 16 comprising growing bone through porous spaces in the wedge.