Patient-adapted and improved articular implants, designs and related guide tools
View Patent ↗Methods and devices are disclosed relating improved articular models, implant components, and related guide tools and procedures. In addition, methods and devices are disclosed relating articular models, implant components, and/or related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient's joint. The data can be used to create a model for analyzing a patient's joint and to devise and evaluate a course of corrective action. The data also can be used to create patient-adapted implant components and related tools and procedures.
1. A patient specific knee implant system for implantation in a knee joint of a patient, comprising:
a femoral implant for implantation on a femur of the patient and a tibial implant for implantation on a tibia of the patient,
the femoral implant including a condyle portion having a curved condylar shape and having an outer surface configured to articulate with the tibial implant when the tibial and femoral implants are implanted in the knee joint of the patient and an inner surface configured to abut one or more bone cut surfaces of the femur of the patient when the femoral implant is implanted in the knee joint of the patient, and
the tibial implant including a bearing surface configured to articulate with the outer surface of the femoral implant when the tibial and femoral implants are implanted in the knee joint of the patient, and a bone-facing surface configured to abut a surface of the tibia of the patient when the tibial implant is implanted in the knee joint of the patient,
wherein the outer surface of the condyle portion includes shape information of a J-curve of a femoral condyle of the knee joint of the patient.
2. The patient specific knee implant system of claim 1 , wherein a sagittal curvature of the outer surface of the femoral implant substantially matches the J-curve.
3. The patient specific knee implant system of claim 1 , wherein a sagittal curvature of the outer surface of the femoral implant approximates the J-curve.
4. The patient specific knee implant system of claim 1 , wherein a sagittal curvature of the outer surface of the femoral implant substantially matches at least a portion of the J-curve.
5. The patient specific knee implant system of claim 1 , wherein the condyle portion has a patient specific curvature in a substantially coronal plane.
6. The patient specific knee implant system of claim 1 , wherein the condyle portion has a constant curvature in a substantially coronal plane.
7. The patient specific knee implant system of claim 1 , wherein the condyle portion has a patient specific curvature in a substantially sagittal plane.
8. The patient specific knee implant system of claim 1 , wherein the condyle portion has a constant curvature in a substantially sagittal plane.
9. The patient specific knee implant system of claim 1 , further comprising a second condyle portion having a second curved condylar shape and having a second outer surface configured to articulate with the tibial implant when the tibial and femoral implants are implanted in the knee joint of the patient and a second inner surface configured to abut one or more bone cut surfaces of the femur of the patient when the femoral implant is implanted in the knee joint of the patient.
10. The patient specific knee implant system of claim 9 , wherein the condyle portion is larger than the second condyle portion.
11. The patient specific knee implant system of claim 9 , wherein a curvature of the condyle portion is larger than a corresponding curvature of the second condyle portion.
12. The patient specific knee implant system of claim 9 , wherein the condyle portion is different than the second condyle portion.
13. The patient specific knee implant system of claim 9 , wherein a curvature of the condyle portion is different than a corresponding curvature of the second condyle portion.
14. The patient specific knee implant system of claim 1 , wherein the tibial implant includes one or more patient-specific features.
15. The patient specific knee implant system of claim 14 , wherein the one or more patient-specific features include a perimeter of the tibial implant.
16. The patient specific knee implant system of claim 1 , wherein the tibial implant includes one or more standard features.
17. The patient specific knee implant system of claim 16 , wherein the tibial implant includes a tibial tray and a tibial tray insert, wherein the one or more standard features include a standard locking mechanism that attaches the tibial tray insert to the tibial tray.
18. The patient specific knee implant system of claim 1 , wherein the inner surface configured to abut the one or more bone cut surfaces is patient-adapted.
19. The patient specific knee implant system of claim 1 , wherein the inner surface configured to abut the one or more bone cut surfaces is patient-specific.
20. The patient specific knee implant system of claim 1 , wherein the inner surface configured to abut the one or more bone cut surfaces is preoperatively designed based on patient-specific data.
21. The patient specific knee implant system of claim 1 , wherein the inner surface configured to abut the one or more bone cut surfaces is preoperatively selected from preexisting designs.
22. The patient specific knee implant system of claim 1 , wherein the femoral implant consists of a single component.