Implant device and method for manufacture
View Patent ↗A knee implant includes a femoral component having first and second femoral component surfaces. The first femoral component surface is for securing to a surgically prepared compartment of a distal end of a femur. The second femoral component surface is configured to replicate the femoral condyle. The knee implant further includes a tibial component having first and second tibial component surfaces. The first tibial component surface is for contacting a proximal surface of the tibia that is substantially uncut subchondral bone. At least a portion of the first tibial component surface is a mirror image of the proximal tibial surface. The second tibial component surface articulates with the second femoral component surface.
1. A method for making an implant suitable for repairing an articular surface of a joint, the method comprising:
a. determining a desired dimension selected from the group consisting of width, length, curvature, thickness, and any combination thereof, of an articular implant based on an articular shape derived from image data of the joint;
b. providing a blank with at least one corresponding dimension larger than the desired dimension of the articular implant; and
c. cutting the blank to obtain the desired dimension of the articular implant.
2. The method according to claim 1 , wherein the blank is made of a material selected from the group consisting of a polymer, a metal, a cross-linked polymer, a ceramic, a ceramic-metal composite, an alloy, and any combination thereof.
3. The method according to claim 1 , wherein providing the blank includes forming the blank by casting, milling, forging, compression molding, extruding or injection molding.
4. The method according to claim 1 , wherein cutting the blank includes cutting the blank such that at least a portion of one surface of the implant is substantially a negative of at least a portion of the articular surface of the joint.
5. The method according to claim 1 , further comprising obtaining the image data of the joint by an imaging technique selected from the group consisting of MRI, CT, ultrasound, digital tomosynthesis, optical coherence tomography, and any combination thereof.
6. The method according to claim 1 , wherein the implant includes one of a cartilage repair implant, a unicompartmental knee implant, a bicompartmental knee implant, a total knee replacement implant, a hip implant, and a shoulder implant.
7. The method according to claim 1 , wherein the implant is an interpositional joint implant.
8. The method according to claim 1 , wherein the interpositional joint implant is associated with one of a knee, hip and shoulder.
9. The method of claim 1 , further comprising selecting the blank from a library of pre-made implants.
10. The method of claim 1 , wherein the joint is a knee joint, wherein the articular implant includes a surface configured to substantially replicate at least a portion of a femoral condyle of the knee joint.
11. The method of claim 1 , wherein the articular implant includes a surface configured to substantially replicate at least a portion of articular curvature of the joint.
12. The method of claim 1 , wherein the articular implant includes a surface that substantially replicates a cartilage surface of the joint.
13. The method of claim 1 , wherein the articular implant includes a surface that substantially replicates a subchondral bone surface of the joint.
14. A method for making an implant suitable for repairing an articular surface of a joint, the method comprising:
a. determining a desired dimension of an articular implant based on image data of the joint;
b. providing a blank with at least one dimension smaller than the desired dimension of the articular implant; and
c. adding material to the blank so as to obtain the desired dimension of the articular implant.
15. The method according to claim 14 , wherein adding material to the blank includes laser sintering and/or electron beam melting.
16. The method according to claim 14 , wherein adding material to the blank includes adding a material selected from the group consisting of a ceramic, a metal, a ceramic-metal composite, and any combination thereof.
17. The method according to claim 14 , further comprising, after adding material, polishing the material added to the blank.
18. The method according to claim 14 , wherein the blank is made of a material selected from the group consisting of a polymer, a metal, a cross-linked polymer, a ceramic, a ceramic-metal composite, an alloy, and any combination thereof.
19. The method according to claim 14 , wherein providing the blank includes forming the blank casting, milling, forging, compression molding, extruding or injection molding.
20. The method according to claim 14 , wherein material is added to the blank such that at least a portion of one surface of the implant is substantially a negative of at least a portion of the articular surface of the joint.
21. The method according to claim 14 , further comprising obtaining the image data of the joint by an imaging technique selected from the group consisting of MRI, CT, ultrasound, digital tomosynthesis, optical coherence tomography, and any combination thereof.
22. The method according to claim 14 , wherein the implant includes one of a cartilage repair implant, a unicompartmental knee implant, a bicompartmental knee implant, a total knee replacement implant, a hip implant, and a shoulder implant.
23. The method according to claim 14 , wherein the implant is an interpositional joint implant.
24. The method according to claim 23 , wherein the interpositional joint implant is associated with one of a knee, hip and shoulder.
25. The method of claim 14 , further comprising selecting the blank from a library of pre-made implants.
26. A method for making an implant suitable for a joint, the method comprising:
a. determining a desired dimension selected from the group consisting of width, length, curvature, and any combination thereof, of an articular surface of the implant based on image data of the joint;
b. providing a blank having at least a corresponding dimension that is different from the desired dimension of the articular surface of the implant; and
c. modifying the blank to obtain the desired dimension of the surface of the articular implant.
27. The method according to claim 26 , wherein providing the blank includes providing a blank having at least one dimension that is larger than the desired dimension of the articular surface of the implant, and wherein modifying the blank includes cutting the blank with the laser.
28. The method according to claim 27 , wherein modifying the blank includes polishing surfaces cut by the laser.
29. The method according to claim 26 , wherein providing the blank includes providing a blank that has at least one dimension that is smaller than the desired dimension of the articular surface of the implant, and wherein modifying the blank includes adding material by one of laser sintering and electron beam melting.
30. The method according to claim 29 , wherein modifying the blank includes polishing the added material.
31. The method according to claim 26 , wherein the blank is made of a material selected from the group consisting of a polymer, a metal, a cross-linked polymer, a ceramic, a ceramic-metal composite, an alloy, and any combination thereof.
32. The method according to claim 26 , wherein providing the blank includes forming the blank by casting, milling, forging, compression molding, extruding or injection molding.
33. The method according to claim 26 , wherein the blank is modified such that at least a portion of one surface of the implant is substantially a negative of at least a portion of the articular surface of the joint.
34. The method according to claim 26 , further comprising obtaining the image data of the joint by an imaging technique selected from the group consisting of MRI, CT, ultrasound, digital tomosynthesis, optical coherence, and any combination thereof.
35. The method of claim 26 , further comprising selecting the blank from a library of pre-made implants.
36. The method of claim 26 , wherein the joint is a knee joint, wherein the articular implant includes a surface configured to substantially replicate at least a portion of a femoral condyle of the knee joint.