United Orthopedic Corporation

24 When the Onset patellar component is choosed, assemble the Onset Patellar Resection Guide 46 to the Patellar Resection Clamp 38 . Use the stylus on the bottom of onset patellar resection guide to check if the remained patellar thickness exceeds 10 mm. If so, clamp the patella tight and place the saw blade into the slot of the clamp and resect the patella until the showing subchondral bone. Then choose the appropriate size Onset Patellar Drill Guide 47 , and drill three round fixation peg holes with the Onset Patellar Peg Drill 48 . Now the preparation for onset patellar component is completed. Now the Onset Patellar Trial 49 may be positioned. Assessing the contact and stability of the bone/implant couple. A thickness measurement of the implant/bone couple may be performed to assure the original patellar A-P thickness. Trialing is performed in a standard fashion. D. Patellar Preparation D.2. Onset Patellar Component Preparation 47 Onset Patellar Drill Guide 9403-5307-RA 9403-5308-RA 9403-5309-RA 9403-5310-RA 9403-5311-RA 9403-5312-RA 9403-5313-RA 49 48 Onset Patellar Peg Drill 9403-4001 46 Onset Patellar Resection Guide 9403-5302-RB Patellar Trial, Onset 2403-2010 2403-2020 2403-2030 2403-2040 2403-2050 2403-2060 2403-2070