Instrumentation for use in an orthopaedic surgical procedure in which a patients femur is prepared to receive a trochlear prosthesis component, comprises a femoral cutting block and a burring guide. The cutting block provides cutting guides which define a portion of the patients femur which can be removed, and a cutting block distal boss extending from the bone-facing surface for insertion into a cavity which is formed in the distal end of the patients femur. The burring guide has a frame having a curved bone-facing side and defining a first opening and a second opening separate from the first opening, for guiding the burring bit of a burring tool. A burring guide distal boss extends from the bone-facing side of the frame and can be inserted into the same cavity in the distal end of the femur into which the cutting block boss was inserted. A base extends downwardly from the burring guide frame, the base being sized to be received in the trochlear cavity in the patients femur which was prepared using the femoral cutting block, the base having first and second mounting holes extending through it.
