United Orthopedic Corporation

Patella Sizing and Bone Resection Place the knee in full extension and evert the patella with caution. Remove the excessive cartilage and osteophytes adjacent to the border of patella. Use the Caliper to measure the anterior-posterior dimension of the patella. Caliper 9401-7012 Onset Patella Sizing Ring C/N varies by sizes I nstruments I. Onset Patellar Preparation Use the Onset Patella Sizing Rings to evaluate proper bone coverage. Locate the central hole of the sizing ring to the center of the medial ridge of the patella. Mark the center of the implant by carefully drilling through the center hole of the sizing ring with the 3.2 mm Drill . The depth of the drilled hole should be slightly deeper than the thickness of the chosen size of implant. 40 3.2 mm Drill 9304-3100