title: The incidence of avascular necrosis of the healthy, contralateral femoral head at the end of the use of Pavlik harness in unilateral hip dysplasia.
abstract: We examined the incidence of avascular necrosis (AVN) of the healthy femoral head in unilateral hip dysplasia at the end of the use of the Pavlik harness. The evaluation of AVN was done with the help of standardised roentgenograms. Between 1974 and 1982, 1,064 dysplastic hips (869 children) were treated with the Pavlik harness at the Orthopaedic Department of Semmelweis University. Of these, 674 children who had unilateral hip dysplasia were chosen for this study. In the period of our investigation, ultrasonography was not yet used routinely, so in some cases the hip was mistakenly diagnosed as dysplastic. The average patient age was 3.2 months, and the average length of treatment was 4.9 months. We found no correlation between the appearance of AVN in the healthy hips at the end of treatment with the Pavlik harness and the age of the child at the start of treatment. On the other hand, there was a strong significant correlation between the appearance of AVN and the length of treatment.
authors.affiliation: Department of Orthopaedics, Semmelweis University of Budapest, 27 Karolina Street, 1113, Budapest, Hungary. sulcus@freemail.hu
authors.forename: Károly
authors.initials: K
authors.lastname: Pap
authors.forename: Sándor
authors.initials: S
authors.lastname: Kiss
authors.forename: Tamás
authors.initials: T
authors.lastname: Shisha
authors.forename: Tamás
authors.initials: T
authors.lastname: Shiha
authors.forename: Gábor
authors.initials: G
authors.lastname: Marton-Szücs
authors.forename: György
authors.initials: G
authors.lastname: Szöke
mesh_terms: D005260:Female; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000453:epidemiology*; D006618:Hip Dislocation, Congenital / Q000628:therapy*; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D009989:Orthotic Devices / Q000009:adverse effects*; D011859:Radiography