TOOL FOR CUSTOM-MADE INSTRUMENTS AND IMPLANT FOR ARTIFICIAL KNEE JOINT OF DOGS

Abstract

Total knee replacement is the standard treatment for advanced knee osteoarthritis. An improved method of treating an osteochondral defect for knee osteoarthritis of dogs is provided, which is a composite tissue for treating or preventing disease, disorder, or condition associated with an osteochondral defect with new technique. The new technique of custom made instruments and implants for dog and small animals is applied for different breeds of dogs regardless of their sizes and weights. The tool is a custom made instrument, which is based on capture of image based (CT of computed X-ray) to be transferred to electronic 3D model and apply 3D preoperative planning to design the tools are used to perform the knee surgery.

Claims

1. A custom made implant for use on a dog or small animal in a knee arthroplasty (TKA) surgery, comprising: A metallic tibial component; A metallic femoral component; and A plastic part positioned at an intersection of said metallic tibial and femoral components, said plastic part simulating natural articular cartilage such that said metallic tibial component articulates with said metallic femoral component due to said plastic part; Wherein the custom made implant is designed based on a planning of virtual surgery of the TKA on a specific software and according a surgical technique of the TKA; and Wherein the custom made implant provides an artificial knee prosthesis, fitting to an exact anatomical structure of a stifle of the dog or small animal undergoing the TKA surgery.

2. The custom made implant of claim 1, wherein said metallic femoral component is characterized by four internal surfaces (5) matching a femur bone anatomy of the stifle and fit to main femoral cuts including a distal cut, an anterior cut, an anterior chamfer cut and a posterior cut.

3. The custom made implant of claim 1, wherein said metallic femoral component is characterized by two anterior pegs (4) extended between two epicondyles.

4. The custom made implant of claim 1m wherein said metallic femoral component is characterized by an external groove with a fork shape not extending to a trochlea, so as to decrease pain of trochlea area bone rubbing on a metallic surface of the implant.

5. The custom made implant of claim 12, wherein said metallic tibial component is characterized by a heart shape design (1) adapted to fit a tibia bone in a cutting area after a tibia bone resection, said heart shape design configured to overcome un-coverage and overhand complications.

6. The custom made implant of claim 1, wherein the custom made implant is manufactured according to image-based, 3D, preoperative planning.

7. The custom made implant of claim 1, wherein the custom made implant is manufactured and built of mesh and porous metallic material to allow for osteointegration.

8. The custom made implant of claim 1, wherein the custom made implant is tailed specifically for each case using a universally applicable implant.

9. The custom made implant of claim 1, wherein the custom made implant fits the naked bone so as to be suitable for any animal, regardless of their shape and anatomy of their knees.

Description

DESCRIPTION OF DRAWINGS

[0013] FIG. 1: Tibial Implant

[0014] All views (1-A, 1-B)

[0015] The figure has two views of the tibial implant in isometric and front view. The tibial implant has an articular surface (label no. 1) matching with femoral implant surface, and a stem with tapered shape (label no. 2).

[0016] FIG. 2: Femoral Implant

[0017] All views (2-A, 2-B)

[0018] The figure has two views of the femoral implant in isometric and side view. The femoral implant has a central groove with an articular surface (label no. 3) matching with patella track surface. The femoral implant has four femoral cut surfaces for distal, anterior, posterior, and anterior chamfer (label no. 5), and two pegs with tapered shape (label no. 4).

[0019] FIG. 3: Tibial Tool Part:

[0020] All views (3-A, 3-B, 3-C, 3-D, 3-E and 3-F)

[0021] The figure has several views of the tibial tool from 3-A to 3-F. the tibial tool was designed to have two surfaces for matching with the tibia bone (label no. 9 and 10), the tibial tool has four fixation holes located as two holes in anterior side (label no. 6) and two holes in the top side (label no. 8). The tibial tool has a slit for performing of tibial cut (label no. 7) and a central hole in the top surface for drilling of the stem (label no. 11). Views (3-E and 3-F) shows the tibial tool over the tibia bone.

[0022] FIG. 4: Femoral Tool Part:

[0023] All views (4-A, 4-B, 4-C, 4-D, 4-E and 4-F)

[0024] The figure has several views of the femoral tool from 4-A to 4-F. the femoral tool was designed to have two surfaces for matching with the femur bone (label no. 16 and 17), the femoral tool has two luge holes for drilling of pegs (label no. 14). The femoral tool has a slits to performing the femoral cuts (label no. 15 and 18). Views (4-E and 4-F) shows the femoral tool over the femur bone.

REFERENCES

[0025] 1. US 2005/0055100 A1 (Lewis et al.) 10 Mar. 2005. [0026] 2. WO 2014198279 (HAFEZ, Mahmoud Aim EL Din) 18 Dec. 2014. [0027] 3. U.S. Pat. No. 8,435,246 B2 (Michael G. Fisher, Anthony K. Hedley, T. NEVINS, Kevin M. Cordes) 7 May 2013