70 year old female known case of diabetes and hypertension had underwent bilateral total knee replacement 11 years ago (elsewhere). Recently she had history of 2 episodes of dislocation of left knee 2 months apart following minor trauma. Both dislocations were managed in hospital elsewhere. She came to our OPD with complaints of instability left knee joint and pain. On clinical examination knee was unstable more so in flexion. Patient was planned for revision total knee replacement left side. Rotating hinge knee prosthesis was used after removing the previous implant. Patient is asymptomatic and is normally bearing weight on the left leg.