Authors of section

Executive editor

Michael Baumgaertner


Michael Huo, Michael Leslie, Iain McFadyen

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Fracture around a loose tibial component with poor bone stock

General considerations

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

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

Nondisplaced tibial plateau or tubercle


Fractures often occur with minimal or no trauma.

Clinical signs

  • 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.

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