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 femoral implant for repairing a knee joint of a patient, comprising:
a bone-facing surface and
a condylar portion having a joint-facing surface, wherein the joint-facing surface has an overall shape defined by multiple radii of curvature, wherein a posterior portion of the joint-facing surface has a shape defined by decreasing radii of curvature.
2. The femoral implant of claim 1 , wherein the multiple radii of curvature are in a sagittal plane.
3. The femoral implant of claim 2 , wherein the joint-facing surface has a single radius in a coronal plane.
4. The femoral implant of claim 1 , wherein the multiple radii of curvature are derived from a corresponding curve of a femoral condyle of the knee joint of the patient.
5. The femoral implant of claim 4 , wherein the corresponding curve is a sagittal J-curve of the knee joint of the patient.
6. The femoral implant of claim 1 , wherein a distal portion of the joint-facing surface has a smoothed curvature.
7. A knee replacement system including the femoral implant of claim 1 , and a tibial implant, wherein the tibial implant has a tibial articulating surface having a shape matching the overall shape of the joint-facing surface of the femoral implant.
8. The knee replacement system of claim 7 , wherein the joint-facing surface has a single radius in a coronal plane, and the tibial articulating surface has a matching single radius in the coronal plane.
9. The knee replacement system of claim 7 , wherein the multiple radii of curvature are in a sagittal plane, and the tibial articulating surface has matching multiple radii of curvature in the sagittal plane.
10. The knee replacement system of claim 7 , further including one or more surgical tools.
11. The knee replacement system of claim 10 , wherein at least one of the one or more surgical tools is designed using electronic image data of the knee joint of the patient.