Patient selectable joint arthroplasty devices and surgical tools
Disclosed herein are methods, compositions and tools for repairing articular surfaces repair materials and for repairing an articular surface. The articular surface repairs are customizable or highly selectable by patient and geared toward providing optimal fit and function. 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 for making a patient specific surgical tool based at least in part on a joint space width in a joint of a patient, the method comprising:
obtaining image data associated with at least a portion of the joint of the patient;
determining the joint space width of the joint based at least in part on the image data;
determining at least one of a mechanical and an anatomical axis associated with the joint;
generating a patient-specific surgical tool based in part on the joint space width;
wherein the surgical tool includes at least one surface portion having a shape that substantially conforms to a corresponding surface portion of the joint of the patient, and includes a surgical instrument guide having a predetermined position relative to the surface portion such that the surgical instrument guide defines a predetermined cutting or drilling path relative to the at least one of the mechanical and the anatomical axis of the joint when the surface portion is aligned with and placed against the corresponding surface portion of the joint, so as to provide a desired postoperative correction.
2. The method of claim 1 , wherein the joint is a knee joint of the patient.
3. The method of claim 2 , wherein the knee joint includes a tibiofemoral joint.
4. The method of claim 2 , wherein the knee joint includes a patellofemoral joint.
5. The method of claim 1 , wherein the joint is a shoulder joint of the patient.
6. The method of claim 1 , wherein the joint is a hip joint of the patient.
7. The method of claim 1 , wherein the image data is derived from an imaging selected from the group consisting of one of a CT scan, a MRI scan, an optical scan, an ultrasound imaging and any combination thereof.
8. The method of claim 1 , wherein the image data is two dimensional image data.
9. The method of claim 1 , wherein the joint space width is determined at least in part using a single scan plane orientation.
10. The method of claim 1 , wherein the joint space width is determined at least in part using a single scan plane orientation in a sagittal, coronal or axial plane of the joint.
11. The method of claim 1 , wherein the image data is three dimensional image data.
12. The method of claim 1 , wherein the joint space width is determined at least in part using at least two scan plane orientations.
13. The method of claim 1 , wherein the joint space width is determined at least in part using a first scan plane orientation in a sagittal plane and a second scan plane orientation in a coronal plane.
14. The method of claim 1 , wherein the joint space width is determined at least in part using the distance from the subchondral bone plate of one articular surface of the joint to the subchondral bone plate of an opposing articular surface of the joint.
15. The method of claim 1 , wherein the joint space width is determined at least in part using a cartilage thickness of the joint.
16. The method of claim 1 , wherein the joint space width is determined in more than one region of the joint.
17. The method of claim 1 , wherein the joint space width is determined in one or more positions from the group of anterior, posterior, medial, lateral, superior and inferior positions.