Total Knee Arthroplasty for Neglected Habitual Dislocation of Patella with Knee Osteoarthritis

Habitual dislocation of patella is characterized by spontaneous dislocation of the patella out of the patellofemoral joint, leading to altered patellofemoral kinematics and possibly early onset of arthrosis. Case: We performed total knee arthroplasty (TKA) on a 62-year-old male patient who presented with symptomatic knee osteoarthritis resulting from habitual dislocation of the patella. The patient had a painless unassisted gait with stable patella and 5 to 95° knee range of motion, 23 months after surgery. Conclusion: TKA can be an effective treatment option for geriatric patients with habitual patellar instability and concomitant knee osteoarthritis, but may require surgical modifications based on individual pathoanatomy.