Technique for patellar resurfacing in total knee arthroplasty

The proper size of the patellar component for a total knee arthroplasty can be determined with the use of a caliper. The thickness of the patella is measured prior to removing the articular surface and again after the trial component has been inserted into the patella. The measurements should be approximately the same in thickness. It is important to select the proper patellar component to avoid loss of flexion of the knee, a very prominent patella, and postoperative subluxation of the patella.