Abstract
Purpose
The aim of this study was to analyse the results of treatment of sonographically diagnosed type IIb developmental hip dysplasia and to identify residual hip dysplasia using clinical and radiological assessment.
Methods
We retrospectively reviewed the data of 49 children (59 type IIb and 39 type I hips, according to Graf’s monographic classification) treated in abduction braces. The mean age was 9.1 years (range 4–15) at latest follow-up.
Results
According to the clinical classification of Mckay in Barrett’s modification, all the type I and type IIb hips had very good results. No statistical differences were found between type I and IIb hips when comparing both measured radiological parameters and radiological results according to the Severin classification at latest follow-up. Using our criteria (two or more radiological parameters were outside of their normal range), 12 out of 49 type IIb hips demonstrated persistent dysplasia. Of the 12 hips, eight sonograms were normal at the end of treatment and four patients failed to normalise. No type I hips demonstrated two or more abnormal radiographic parameters at latest follow-up.
Conclusions
Despite obtaining normal sonograms at the end of treatment, some children with type IIb dysplasia may demonstrate radiographic evidence of persistent hip dysplasia over a longer follow-up period. Our results suggest that these children should be monitored until skeletal maturity.
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The authors declare that they have no conflict of interest.
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Sibiński, M., Adamczyk, E., Higgs, Z.C.J. et al. Hip joint development in children with type IIb developmental dysplasia. International Orthopaedics (SICOT) 36, 1243–1246 (2012). https://doi.org/10.1007/s00264-011-1447-8
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DOI: https://doi.org/10.1007/s00264-011-1447-8