Calipered Kinematic Alignment of Total Knee Arthroplasty with Restoration of Trochlea

[@Bennmourad]

Thank you

[@unb1987]

Thanks for this. The pre-op X-rays would seem to demonstrate patella Alta with lateral tracking. Would you consider restricted correction of this as her primary complaint is patella pain; ie maintain a kinematic approach to her tibiofemoral joint, but consider a medialised patella implant with perhaps a 2 degree external rotation of the femoral implant from the posterior condylar axis? I understand the approach is restricted kinematic but it would seem the native patella position/tracking is not within a “normal range”. In the same manner that some consider a “normal” HKA to be +|- 3 degrees, with a max 5degrees femoral/tibial angles, do you believe there to be a “normal” range for native patella position?