Comparative Effect of Mechanical and Functional Alignment in Bilateral Total Knee Arthroplasty on Ankle Alignment

Comparative Effect of Mechanical and Functional Alignment in Bilateral Total Knee Arthroplasty on Ankle Alignment : a Randomized Controlled Trial

Mechanical alignment (MA) in total knee arthroplasty (TKA) is the most commonly used with well-documented long-term results, however 20% of patients express dissatisfaction following primary TKA. Alternative alignment philosophies have been proposed, aiming to improve patient clinical outcomes and satisfaction. However, evaluation is focused mainly on knee alignment, the pathological findings and other adaptational changes in the ankles and hips are usually neglected.

Thia study aim to comparative effect between mechanical and functional alignment in patient undergone bilateral robotic TKA on ankle alignment and functional outcomes.

Inclusion Criteria:

• Age 20-80 years
• Symptomatic bilateral knee Osteoarthritis requiring primary TKA
• Willing to undergo bilateral simultaneous TKA
• Able to give informed consent

Exclusion Criteria:

• ligament deficiency requiring constrained prosthesis
• bone loss with augmentation need
• history of fracture around knee or previous osteotomy
• history of ankle fracture
• patient with neuromuscular disorder or movement disorder
• patient is unable to attend the study follow-up program