No specific wear pattern of the patella or trochlear cartilage is considered a contraindication to the procedure, provided that the defects are adequately covered by the prosthesis.

• 特殊的磨损的髌骨或滑车软骨模式，假如那些瑕疵被替代物充分的掩盖住了，不会被认为是该程序的禁忌症。