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DeVries CA, Hahn P, Bomar JD, et al. Prevalence of trochlear dysplasia in infants evaluated for developmental dysplasia of the hip. J Child Orthop. 2021;15(3):298-303doi: 10.1302/1863-2548.15.210018.
DeVries, C. A., Hahn, P., Bomar, J. D., Upasani, V. V., & Pennock, A. T. (2021). Prevalence of trochlear dysplasia in infants evaluated for developmental dysplasia of the hip. Journal of children's orthopaedics, 15(3), 298-303. https://doi.org/10.1302/1863-2548.15.210018
DeVries, Clarabelle A, et al. "Prevalence of trochlear dysplasia in infants evaluated for developmental dysplasia of the hip." Journal of children's orthopaedics vol. 15,3 (2021): 298-303. doi: https://doi.org/10.1302/1863-2548.15.210018
DeVries CA, Hahn P, Bomar JD, Upasani VV, Pennock AT. Prevalence of trochlear dysplasia in infants evaluated for developmental dysplasia of the hip. J Child Orthop. 2021 Jun 01;15(3):298-303. doi: 10.1302/1863-2548.15.210018. PMID: 34211607; PMCID: PMC8223085.
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J Child Orthop. 2021 Jun 01;15(3):298-303. doi: 10.1302/1863-2548.15.210018.

Prevalence of trochlear dysplasia in infants evaluated for developmental dysplasia of the hip.

Journal of children's orthopaedics

Clarabelle A DeVries, Peter Hahn, James D Bomar, Vidyadhar V Upasani, Andrew T Pennock

Affiliations

  1. The University of Chicago Medical Center Chicago, Illinois, USA.
  2. Memorial Care Miller Children's & Women's Hospital, Long Beach, California, USA.
  3. Rady Children's Hospital, San Diego, California, USA.

PMID: 34211607 PMCID: PMC8223085 DOI: 10.1302/1863-2548.15.210018

Abstract

PURPOSE: The purpose of this study was to define the incidence of trochlear dysplasia in an infant cohort being screened for developmental dysplasia of the hip (DDH).

METHODS: Newborns screened for DDH that were evaluated with ultrasound for the presence of trochlear dysplasia were retrospectively reviewed. The sulcus angle and trochlear depth were measured. Based on previous work, trochlear dysplasia was defined as a sulcus angle of > 159°. Our newborn cohort was then analyzed to identify potential risk factors for trochlear dysplasia.

RESULTS: A total of 383 knees in 196 infants were studied. In total, 52% were referred for breech intrauterine positioning and 21% were ultimately diagnosed with DDH and had treatment initiated with a Pavlik harness. Of the entire cohort, 8% of knees were deemed to have trochlear dysplasia. Breech patients were found to have a flatter sulcus angle than those that were not breech (149.5° (sd 7.2°)

CONCLUSION: Ultrasound screening of newborn knees reveals that trochlear dysplasia is relatively common in breech babies with DDH.

LEVEL OF EVIDENCE: III.

Copyright © 2021, The author(s).

Keywords: developmental dysplasia of the hip; trochlear dysplasia

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