Technical aspects: the patellar side.

Complications of patellar resurfacing depend largely on technique. Patellar preparation is only one element of the technique. Correct implantation can be obtained when soft tissues are equilibrated previously to sectioning, patellar cut is parallel to the prosthetic trochlea, the patellar is centered in relation to the center of the trochlea, and when thickness and height of the patella are maintained.