An orthopaedic surgical instrument includes a patella resection guide. The patella resection guide includes a body (60) having a substantially planar upper surface (66) that defines a patella cutting guide surface (144) and an inner wall (74) defining an aperture through the body. The aperture is configured to receive a patients patella and the inner wall includes a first jaw (78) having a first set of teeth (80) extending inwardly into the aperture. The patella resection guide includes a second jaw (114) positioned opposite the first jaw. The second jaw is and movable relative to the first jaw. The second jaw includes a second set of teeth (116) extending inwardly toward the first jaw. The first jaw includes a first tooth (82) of the first set of teeth having a length greater than any other tooth of the first set of teeth, and the second jaw has a second tooth (118) of the second set of teeth that has a length greater than any other tooth of the second set of teeth.
