Patient-specific osteotomy instrumentation

A method for making a patient-specific cutting guide configured for an osteotomy procedure, the method comprising:

• accessing a bone model of one or more bones of adjacent joints of a patient;
• defining one or more guide features of a preliminary cutting guide model for an osteotomy procedure, the preliminary cutting guide model comprising a superior surface and an inferior surface;
• defining at least a portion of the inferior surface of the preliminary cutting guide model according to a topographical surface of at least one bone of the bone model such that the inferior surface substantially matches a contour of the topographical surface;
• and
• wherein the preliminary cutting guide model is configured for fabrication of a patient-specific cutting guide corresponding to the preliminary cutting guide model.

A method for making a patient-specific cutting guide configured for an osteotomy procedure, the method comprising:

• accessing a bone model of four bones of a plurality of adjacent joints of a patient;
• defining one or more guide features of a preliminary cutting guide model, the one or more guide features are defined based at least in part on patient imaging data and are positioned to guide resection of at least one of a first bone, a second bone, a third bone, and a fourth bone during an osteotomy;
• and
• fabricating a patient-specific cutting guide corresponding to the preliminary cutting guide model, the patient-specific cutting guide comprising:
• a body configured to seat transverse to the plurality of adjacent joints, the body comprising:
• a proximal side, a distal side, a medial side, a lateral side and a superior side;
• an inferior side comprising a bone engagement surface shaped to match a plurality of surfaces of one or more of the first bone, the second bone, the third bone, and the fourth bone;
• and
• one or more guide features positioned to guide resection of at least one of the first bone, the second bone, the third bone, and the fourth bone during an osteotomy;
• a first anchor feature coupled to the body and configured to receive one or more fasteners to anchor the body to at least one of the first bone, the second bone, the third bone, and the fourth bone.