ADVANCED METHODS OF MODELING KNEE JOINT KINEMATICS AND DESIGNING SURGICAL REPAIR SYSTEMS
Various embodiments of selecting and/or designing one or more aspects of patient-adapted surgical repair systems based, at least in part, on implementation of patient-adapted biomotion simulation models are disclosed herein.
1 . A method of making a patient-adapted implant for a knee joint of a patient, the method comprising:
obtaining a 3D bone geometry of at least a portion of the joint;
deriving at least a portion of one or more articular surfaces of the joint utilizing a homogenous dilation of the 3D bone geometry;
determining an approximate location of one or more ligament attachments of the joint;
implementing a biomotion simulation model of the joint utilizing the at least a portion of the one or more articular surfaces of the joint and utilizing the approximate location of the one or more ligament attachments;
deriving at least one parameter associated with the joint based, at least in part, on information obtained from the implementing of the biomotion simulation model; and
manufacturing a patient-adapted implant for treating the joint such that the patient-adapted implant includes at least one aspect based, at least in part, on the derived at least one parameter.
2 . The method of claim 1 , wherein the at least one parameter comprises rollback of a medial portion of a femur of the joint during flexion.
3 . The method of claim 1 , wherein the at least one parameter comprises rollback of a lateral portion of a femur of the joint during flexion.
4 . The method of claim 1 , wherein the at least one parameter comprises one or more locations of at least a portion of a patella of the joint at one or more, respective, flexion and/or extension angles of the joint.
5 . The method of claim 1 , wherein the at least one parameter comprises a degree of internal and/or external rotation of one or more condyles of a femur of the joint.
6 . The method of claim 1 , wherein the at least one parameter comprises a degree of internal and/or external rotation of at least a portion of a tibia of the joint.
7 . The method of claim 1 , wherein the homogenous dilation comprises a dilation of about 3 mm.
8 . The method of claim 1 , wherein the implementing the biomotion simulation model comprises simulating a deep knee bend of the joint.
9 . The method of claim 1 , wherein the least one aspect comprises a curvature of at least a portion of a joint-facing surface of the implant.
10 . A method of making a patient-adapted surgical instrument for treating a knee joint of a patient, the method comprising:
obtaining a 3D bone geometry of at least a portion of the joint;
deriving at least a portion of one or more articular surfaces of the joint utilizing a homogenous dilation of the 3D bone geometry;
determining an approximate location of one or more ligament attachments of the joint;
implementing a biomotion simulation model of the joint utilizing the at least a portion of the one or more articular surfaces of the joint and utilizing the approximate location of the one or more ligament attachments;
deriving at least one parameter associated with the joint based, at least in part, on information obtained from the implementing of the biomotion simulation model; and
manufacturing a patient-adapted surgical instrument for treating the joint such that the patient-adapted surgical instrument includes at least one aspect based, at least in part, on the derived at least one parameter.
11 . The method of claim 10 , wherein the at least one parameter comprises rollback of a medial portion of a femur of the joint during flexion.
12 . The method of claim 10 , wherein the at least one parameter comprises rollback of a lateral portion of a femur of the joint during flexion.
13 . The method of claim 10 , wherein the at least one parameter comprises one or more locations of at least a portion of a patella of the joint at one or more, respective, flexion and/or extension angles of the joint.
14 . The method of claim 10 , wherein the at least one parameter comprises a degree of internal and/or external rotation of one or more condyles of a femur of the joint.
15 . The method of claim 10 , wherein the at least one parameter comprises a degree of internal and/or external rotation of at least a portion of a tibia of the joint.
16 . The method of claim 10 , wherein the homogenous dilation comprises a dilation of about 3 mm.
17 . The method of claim 10 , wherein the implementing the biomotion simulation model comprises simulating a deep knee bend of the joint.
18 . The method of claim 10 , wherein the at least one aspect comprises a predetermined depth of a bone cut to be guided by the patient-adapted surgical instrument.