HTO Guide With Optional Guided ACL/PCL Tunnels

A patient-specific osteotomy system comprising:

• an osteotomy cutting tool;
• at least one of an ACL tunnel forming tool and a PCL tunnel forming tool;
• and
• a single integrated osteotomy guide including:
• a three-dimensional bone-engaging inner surface configured to closely mate and conform to a corresponding portion of a specific patient's tibia;
• a resection slot at a patient-specific position and orientation to guide the osteotomy cutting tool to perform an osteotomy according to a preoperative plan for the patient;
• and
• an axial guide at a patient-specific position and orientation to guide the at least one of the ACL tunnel forming tool and the PCL tunnel forming tool to perform at least one of an ACL reconstructive procedure and a PCL reconstructive procedure according to the preoperative plan for the patient.

A method of performing a patient-specific osteotomy comprising:

• aligning a three-dimensional inner surface of a patient-specific guide configured to closely mate and conform to a corresponding portion of a patient's tibia in only one position and orientation;
• forming a patient-specific ligament tunnel in the patient's tibia using the patient-specific guide;
• cutting a slot into the patient's tibia along an osteotomy guide slot of the patient-specific guide a predetermined distance into the tibia;
• and
• inserting a ligament replacement into an aperture created by forming the ligament tunnel in the patient's tibia.

An osteotomy method comprising:

• attaching a patient-specific osteotomy guide to a corresponding surface of a tibia of a patient, the osteotomy guide configured during a preoperative pan for the patient to mate only in one position on the corresponding surface of the tibia;
• forming a tunnel at a patient-specific orientation through a cylindrical aperture of the osteotomy guide, the cylindrical aperture configured for the specific patient during the preoperative plan of the patient;
• making an osteotomy at a patient-specific orientation through a resection slot of the osteotomy guide and configured for the specific patient during the preoperative plan of the patient;
• removing the osteotomy guide;
• positioning the tibia relative to the osteotomy;
• and
• securing the tibia relative to the osteotomy.

A method of forming an osteotomy guide, comprising:

• determining a lateral plateau point on a plane across a plateau of a tibia of a patient;
• determining a tibia hinge axis from an intersection of a plane through a point a first predetermined distance below the lateral plateau point and a plane through a point a second predetermined distance medial to the lateral plateau point;
• determining a tibia saw entry point on a plane through the tibia hinge axis;
• determining a correction angle;
• determining a tunnel entry point and angle with respect to a longitudinal axis through the center of the tibia;
• and
• generating an osteotomy guide reflecting the tibia saw entry point, an angle of the plane through the hinge axis, the tunnel entry point, and the tunnel angle.