A 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 a 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 instruments, which is based on capture of image based (CT or 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 Tool for preparing an artificial knee joint for a dog and small animals while undergoing total knee arthroplasty (TKA) surgery. A method of planning and complete virtual surgery of TKA leading to the production of the tool mentioned in claim one The Tool consists of two parts; a femoral part and a tibial part The Tool is designed as a complete cutting guide that match the surface of the bone. Surface matching of the device relies on protruding locating surface that match bony surfaces This technology is suitable for knee replacement for different breeds of dogs regardless of its sizes. This technology does not need preoperative coupling with other surgical instruments such as drills or sleeves that are related to a particular company. This technology can replace the conventional instruments for TKA such as intramedullary, extra-medullary guides, sizing, rotation guides for both tibial and femur. The femoral implant unlike previous implants does not extend to the trochlea The femoral implant has a good anterior pegs and a central stem

Description

DESCRIPTION OF PATENT

[0008] The current invention involves planning for TKA with the very early step through digital templating (through digital radiograph, CT scan and MRI) to design the prosthetic components of TKA virtually. The design should planned according to proper designation criteria including calculated magnification, angulation and alignment. This is the first step for preparing the subject's stifle for TKA.

[0009] The virtual deign is transformed into physical components which are the tool that is produced through medical rapid prototyping (aka, additive manufacturing or 3D printing). The physical components are thus tailored specifically for the subject according to the collected measures from radiographs. Simulation of surgery would lead to accurate positioning of the prosthetic components.

[0010] The tool should overcome the undersizing or overhang that usually take place with the currently used knee implants. The prosthetic components are the bone-like femoral and tibial parts (metallic components) and the middle plastic part that resembles natural knee cartilage.

[0011] This technology is suitable for any knee regardless of different shapes, configurations and anatomy. The prosthetic components are made of durable, biocompatible and hybrid materials containing metallic and composite parts which are produced through bone-machining steps including sizing, alignment, bone cutting and positioning.

BRIEF DESCRIPTION OF DRAWINGS

[0012] 1) Tibial implant base [0013] 2) Tibial implant stem [0014] 3) Femoral implant central groove [0015] 4) Femoral implant stem [0016] 5) For femoral cuts [0017] 6) Front side fixation holes [0018] 7) Slit for proximal tibia cut [0019] 8) Top side fixation holes [0020] 9) Tibial tool front surface match [0021] 10) Tibial tool top surface match [0022] 11) Hole for making passage of stem [0023] 12) Tibia bone [0024] 13) Tibial tool body [0025] 14) Lug holes [0026] 15) Slit for distal femur cut [0027] 16) Femoral tool front surface match [0028] 17) Femoral tool top surface match [0029] 18) Slit for chamfer cut [0030] 19) Femur bone [0031] 20) Femoral tool body

REFERENCES

[0032] 1. US 2005/0055100 A1 (Lewis et al.) 10 Mar. 2005 (10 Mar. 2005). [0033] 2. WO 2014198279 (HAFEZ, Mahmoud Alm EL Din) 18 Dec. 2014 (18 Dec. 2014). [0034] 3. U.S. Pat. No. 8,435,246 B2 (Michael G. Fisher, Anthony K. Hedley, T. NEVINS, Kevin M. Cordes) 7 May 2013 (7 May 2013)