PMC3170801_01
(a) Patient 1: anteroposterior radiographs demonstrating eccentric placement of the femoral head within the acetabular polyethylene and excessive acetabular component abduction. (b) Patient 1: direct lateral radiograph demonstrating anterior femoral head subluxation and excessive acetabular component anteversion. (c) Patient 1: anteroposterior radiographs demonstrating concentric femoral head positioning and corrected acetabular component abduction. (d) Patient 1: direct lateral radiograph demonstrating concentric femoral head positioning and corrected acetabular component abduction.
AOP2011-519254.001.jpg
PMC3170801_01_AOP2011-519254.001.jpg
fig1
Supine radiographs showed eccentric positioning of the femoral head within the acetabular polyethylene, and excessive acetabular component abduction (Figure 1(a)). Direct lateral radiograph confirmed femoral head subluxation (Figure 1(b)) and excessive acetabular component anteversion. One-year follow-up radiograph showed no further subluxation (Figures 1(c) and 1(d)).
PMC3170801_02
Patient 2: anteroposterior radiographs demonstrating eccentric placement of the femoral head within the acetabular polyethylene and excessive acetabular component abduction.
AOP2011-519254.002.jpg
PMC3170801_02_AOP2011-519254.002.jpg
fig2
Supine radiographs showed superior eccentric placement of the femoral head within the acetabular polyethylene and excessive acetabular component abduction (Figure 2).