Correlation of postoperative magnetic resonance image measurements with persisting acetabular dysplasia in open reduction of developmental hip dysplasia

Abstract

Objectives: The aim of this study was to evaluate correlationof post-reduction magnetic resonance imaging (MRI)-basedparameters with residual acetabular dysplasia in developmentaldysplasia of the hip (DDH) patients who underwent open reduction.Patients and methods: A total of 62 hips of 54 children (5 males,57 females; mean age: 8.5±3.5 months; range, 0 to 24 months)with a diagnosis of DDH who underwent open reduction betweenJanuary 2012 and January 2017 were retrospectively analyzed.The acetabular head index (AHI), head coverage index (HCI),sphericity, bony acetabular index (BAI), cartilage acetabularindex (CAI), anterior acetabular index (AAI), posterior acetabularindex (PAI), abduction angle (AA), and acetabular medial wallthickness were measured by MRI. The correlation between MRImeasurements and residual acetabular dysplasia was evaluated.Results: The mean follow-up was 23.7±10.1 (range, 12 to 56)months. The mean age at the final examination was 47.6±10.4months. The age at the time of operation (r=0.250, p=0.049), medialwall thickness (r=0.304, p=0.016), AAI (r=0.729, p