Triple deformity of knee consists of 3 components:
1. Flexion deformity at knee
2. Posterolateral subluxation of tibia
3. External rotation of tibia over femoral condyle
Mechanism behind triple deformity of knee:
Causes of Triple deformity of knee:
Mnemonic: TRIPLE
1. Tuberculosis (TB) knee – commonest cause
2. Rheumatoid arthritis
3. ITB contracture
4. Polio
5. Low clotting capacity/
6. Excessive bleeding i.e. hemophilia