Patent ID: 8449553

Claim:
A method of creating a pair of tibial bone tunnels, each having a separate exit aperture on the tibial plateau, said method comprising the steps of: forming a first common bone tunnel extending from the anterior tibia toward but not through the tibial plateau, thereby leaving a thin bone portion between the tibial plateau and the end of said first common bone tunnel; providing a guide for guiding a drill bit into said first common bone tunnel, said first common bone tunnel having a first diameter, said guide comprising: an elongated body having a proximal end, a distal end, a first axis and a cylindrical portion at said distal end, said cylindrical portion coaxial with said axis and having a predetermined outer diameter adapted to fit within said first common bone tunnel; a bore extending through said cylindrical portion, said bore having a second axis, oriented at a predetermined angle relative to said first axis, inserting the cylindrical distal portion of said guide into said first common bone tunnel; drilling through said thin bone portion of bone at the end of said first common bone tunnel to form a second bone tunnel in communication with said first common bone tunnel, said second bone tunnel having a predetermined diameter smaller than the diameter of said first common bone tunnel, thereby producing a shoulder between said first common bone tunnel and said second bone tunnel; advancing said guide until it abuts the shoulder at the junction of said first common bone tunnel and said second bone tunnel; orienting said guide about its axis to align said bore with a selected point on the tibial plateau; advancing a drill through said bore toward said selected point on the tibial plateau to form a third bone tunnel in communication with said first common bone tunnel.