Effect of Different Size of Patellar Resurfacing on Patellar Crepitus of the One-stage Bilateral Total Knee Arthroplasty.

After the patella was resurfaced, surgeon evaluated the symmetry through haptic feedback and assessed the thickness by measuring the distance from the anterior to posterior center of the patella. An inset, single pegged patella component was cemented after milling the patella. The patella was medialized as the patella bone would allow. Synovium laying on top of the femoral component with the knee in extension was routinely excised. Lateral facetectomy and restoration of native patella thickness were performed in all knees. In the control group, anatomically sized patella components were used.

The same procedure of patella resurfacing as control group was done, then 3 mm reduced size patella component was used in the intervention group.