Patient-specific instruments for performing bone cuts

A patient-specific instrument guide comprising:

• a monolithic body comprising a bone contact surface, wherein the bone contact surface is adapted to a target bone surface of a patient using medical imaging;
• the body including one or more guide slots that each slidably receives one or more cutting guides, wherein the one or more cutting guides are configured to receive a saw blade, drill or reamer during cutting of the bone and wherein at least one angulated pin slot is positioned on the cutting guide to position the cutting guide within the patient body;
• a retaining guide that is disposed adjacent to the guide slots and configured to hold the cutting guide within the guide slot, the retaining guide having at least a distal protrusion;
• a pair of fixation holes disposed at the front of the monolithic body and extend through to the bone contact surface;
• and
• wherein one or more positioning holes are disposed along a top of on the body and configured to:
• i) receive positioning pins to assist a surgeon with optimally positioning the bone contact surface with the bone;
• and
• ii) guide a cannulated drill.