acetabular fracture

Acetabular trauma and PTOA

THR Acetabular Fracture

Incidence

Increased incidence with press-fit component

- especially if under ream

Prevention

Don't under-ream >1mm

In osteopenic bone 

- line to line reaming

- i.e. ream to outer diameter of cup

This also avoids leaving gaps at floor 

- very common if under-ream by 2mm