In these cases the patella can be easily lifted out of, and replaced back into the trochlear groove on the femur.
The relationship of the patella to the femoral trochlear is well shown.
trochlear groove on the femur.
trochlear ridges located distally.
trochlear notch with screws.
Another distinctive feature of the femur is the broad groove between the two trochlear ridges located distally.
The challenge is to obtain stable fixation of the ulna without violating the trochlear notch with screws.
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