Revision knee replacement For valgus collapse

X-ray of well done knee replacement after surgery
X-ray after Surgery
 
After knee replacement surgery, very rarely a part of the bone becomes dead due to loss of its blood supply, leading to collapse as seen here
X-ray collapse
 
This required revision
At surgery I used a trabecular metal augment as seen here to fill the gap created by the dead bone
Gap Created By The Dead Bone
 
Final x-ray showing correction of the deformity
X-ray Correction of The Deformity