3-VIEW RADIOGRAPHIC ASSESSMENT OF HETEROTOPIC OSSIFICATION AFTER ACETABULAR FRACTURE SURGERY - CORRELATION WITH HIP MOTION IN 100 CASES

A random sample of 100 patients who had operative treatment for a frac ture of the acetabulum, an otherwise normal appearing hip joint, and a t least one year of follow-up were analyzed to assess heterotopic ossi fication (HO) and its relationship to hip motion. The extent of HO was graded in a blinded fashion according to the Brooker classification, which relies solely on the anteroposterior (AP) view, as well as a mod ified classification using three radiographic views (AP pelvis, intern al, and external Judet oblique views). For each patient, range of moti on of the affected hip was compared with that of the contralateral nor mal limb. There were 16 cases with disagreement between the two method s. As opposed to the Brooker method, the modified classification provi ded an accurate correlation with the actual hip range of motion.