Abstract: Introduction: Knee arthroplasty is one of the most common procedures done in modern day orthopaedic practice. Q angle is net vector of forces acting over patella for a smooth knee range of movement. Knee arthroplasty in case of deformities should focus of alignment in particular.
Case presentation: A 65 year old male came with operated knee with difficulty in flexion and extension of knee. He was evaluated and found to have femoral component loosening and patellar maltracking and multiple comorbidities. We had a comprehensive preoperative plan and executed it. We treated comorbidities and stabilised the patient. Later we went ahead with revision of femoral component and correction of Q angle. Post-operative patient activities of daily living improved. We followed him for 6 months.
Conclusion: Evaluation and achieving proper alignment of limb in case of deformed knee while performing knee arthroplasty is prime focus. Q angle and its correction will help in restoration of kinematics if there is deformed knee preoperatively.
