Magnetic resonance imaging evaluation of the effects of closed reduction in infants with developmental dysplasia of the hip

To the Editor:Manual closed reduction has become the most common treatment for infants with developmental dysplasia of the hip(DDH),especially.those under 18 months old,because it can minimize the limitations of the post-operative range of motion of the hip joint and reduce iatrogenic avascular necrosis.[1] As 90%of children with symptomatic DDH have lesions on the acetabular labrum,we initiated a magnetic resonance imaging(MRI)study of acetabular labrums of dysplastic hips to determine how magnetic resonance-based parameters and contents of joint space could be used to evaluate the therapeutic effect of closed reduction in DDH patients.