Fracture around a loose tibial component with poor bone stock

These fractures are similar to V.4-B2 fractures, but with more severe bone loss.

They are classified by UCPF as V.4-B3.

Fractures often occur with minimal or no trauma.

• Obvious preceding history of pain, abnormal alignment, and poor function
• History of possible infection

Plain X-rays remain the first line of investigation.

CT scan can be used to assess the size and position of fragments, implant stability, and bone stock.
Prior X-Ray is useful for comparison of implant position and bone loss.