Authors of section

Executive editor

Michael Baumgaertner


Michael Huo, Michael Leslie, Iain McFadyen

Open all credits

Fracture around a loose tibial component with good bone stock

General considerations

Commonly occur around the tibial component stem, where loosening has caused additional stress.

These fractures are classified by UCPF as V.4-B2.

Loose component, good bone quality


A simple fall or fracture with minimal or no trauma.

Clinical signs

  • Preceding pain and knee disfunction
  • After injury pain, swelling and deformity


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.

Comparison with previous X-rays is useful.

Go to indication