Patient selectable joint arthroplasty devices and surgical tools
View Patent ↗Disclosed herein are tools for repairing articular surfaces repair materials and for repairing an articular surface. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty.
1. A method of balancing a knee joint of a patient using a patient specific balancing instrument:
placing the knee into a flexed position;
inserting a balancing template between two articular surfaces of the knee joint, wherein the balancing template is derived at least in part from image data of the patient;
placing the knee into an extended position; and
determine a desired balance of the ligaments in the knee to establish a correct location for an implant component.
2. The method of claim 1 , further comprising implanting the implant component in the correct location.
3. The method of claim 1 , wherein the balancing template has a surface contour that is derived from the image data of the patient.
4. The method of claim 1 , wherein the balancing template has an outer geometry that is derived from the image data of the patient.
5. The method of claim 1 , wherein the image data of the patient is CT image data.
6. The method of claim 1 , wherein the image data of the patient is MRI image data.
7. The method of claim 1 , further comprising inserting an additional balancing template from a set of balancing templates between two articular surfaces of the knee joint, wherein the additional balancing template is derived at least in part from image data of the patient.
8. The method of claim 7 , further comprising repeating the step of inserting an additional balancing template from the set of balancing templates and using the different templates in the set to determine an appropriate balancing template for use in achieving a desired balance on of the ligaments.
9. The method of claim 7 , wherein at least one of the balancing templates in the set of balancing templates includes a varied thickness relative to a second of the balancing templates the set of balancing templates.
10. The method of claim 1 , wherein the balancing template mimics an implant component to be implanted.
11. The method of claim 1 , wherein the step of inserting the balancing template further includes determining an appropriate balancing template to achieve the desired ligament tensioning.
12. The method of claim 1 , wherein the balancing template is a femoral balancing template.
13. The method of claim 1 , wherein the balancing template is a tibial balancing template.
14. The method of claim 1 , wherein the implant component is a femoral implant component.
15. The method of claim 1 , wherein the implant component is a tibial implant component.
16. The method of claim 1 , further comprising moving the knee through a range of motion to assess the balance of the knee joint.
17. The method of claim 1 , further comprising removing cartilage of the knee joint and reassessing the balance of the knee joint.
18. The method of claim 1 , further comprising aligning a patient specific alignment instrument with the knee joint and guiding a vertical tibial cut using the alignment instrument.
19. The method of claim 1 , further comprising aligning a patient specific alignment instrument with the knee joint and referencing a horizontal cut using the alignment instrument.
20. The method of claim 19 , wherein the horizontal cut is a tibial cut.
21. The method of claim 19 , wherein the horizontal cut is a femoral cut.
22. A method of balancing a knee joint of a patient using a patient specific balancing instrument:
inserting a balancing template between two articular surfaces of the knee joint, wherein the balancing template is derived at least in part from image data of the patient;
placing the knee into an extended position; and
determine a desired balance of the ligaments in the knee to establish a correct location for an implant component.
23. A method of balancing a knee joint of a patient using a patient specific balancing instrument:
inserting a balancing template between two articular surfaces of the knee joint, wherein the balancing template is derived at least in part from image data of the patient; and
determine a desired balance of the ligaments in the knee to establish a correct location for an implant component.
24. The method of claim 23 , further comprising implanting the implant component in the correct location.
25. The method of claim 23 , wherein the step of inserting the balancing template further includes determining an appropriate balancing template to achieve the desired ligament tensioning.
26. The method of claim 23 , further comprising moving the knee through a range of motion to assess the balance of the knee.
27. The method of claim 23 , further comprising removing cartilage of the knee joint and reassessing the balance of the knee joint.
28. The method of claim 23 , further comprising aligning a patient specific alignment instrument with the knee joint and guiding a vertical tibial cut using the alignment instrument.
29. The method of claim 23 , further comprising aligning a patient specific alignment instrument with the knee joint and referencing a horizontal cut using the alignment instrument.