To assess the stability of the hip after acetabular fracture, dynamic fluor
oscopic stress views were taken of 41 acetabular fractures that met the cri
teria for non-operative management. These included roof arcs of 45 degrees,
a subchondral CT are of 10 mm, displacement of less than 50% of the poster
ior wall, and congruence on the AP and Judet views of the hip. There were t
hree unstable hips which were treated by open reduction and internal fixati
on, The remaining 38 fractures were treated non-operatively with early mobi
lisation and delayed weight-bearing, At a mean follow-up of 2.7 years, the
results were good or excellent in 91% of the cases, Three fair results were
ascribed to the patients' other injuries. Dynamic stress views can identif
y subtle instability in patients who would normally be considered for non-o
perative treatment.