Isolated anteromedial compartment osteoarthritis disease & spontaneous osteonecrosis

Inflammatory arthritis

Cumulative angular deformity < 15˚

Age < 60 years

Weight < 82 kg, Range of motion to 90˚ of flexion with no > 5˚ flexion contracture

High activity level, inflammatory arthropathy

No > 10˚ fixed varus malalignment for a medial arthroplasty

Pain at rest and patellofemoral pain

Anterior & Posterior cruciate ligaments intact with low physical activities

Opposite compartment pain, cruciate ligament deficiency

Age ≥ 60 years, Preoperative range of flexion of at least 90˚

Exposed bone in Patellofemoral compartment