[Sonographic assessment of stable hip reposition in newborns and infants with congenital hip dysplasia treated conservatively].

The paper presents a sonographic assessment of dysplastic hip morphology with clinically diagnosed instability after achieving stable reposition. The analysed group comprised 42 dysplastic unstable hips. They were classified according to the Graf classification as type D, III and IV. The analysed group was divided into 2 subgroups according to the child's age at the time treatment was began. Group I comprised children in whom treatment was began at age 2-6 weeks. Group II included children who were 7-12 weeks old at the time treatment was began. The morphology of the dysplastic hip was assessed basing on angle alpha and beta measurements. Stable repositioning of the hip was achieved on average 5 weeks after conservative treatment was started. The average alpha angle was 50 degrees in group I and 48 degrees in group II; accordingly, angle beta was on average 60 degrees and 69 degrees.