Journal article
Residual hip dysplasia in children: osseous and cartilaginous acetabular angles to guide further treatment-a pilot study.
- Merckaert SR Department of Women and Child's Care, Unit of Pediatric Orthopedics, Centre Hospitalier Universitaire Vaudois, CHUV, Lausanne, Switzerland. sophie.merckaert@chuv.ch.
- Pierzchala K Center of Biomedical Imagery (CIBM), EPFL, Lausanne, Switzerland.
- Bregou A Department of Women and Child's Care, Unit of Pediatric Orthopedics, Centre Hospitalier Universitaire Vaudois, CHUV, Lausanne, Switzerland.
- Zambelli PY Department of Women and Child's Care, Unit of Pediatric Orthopedics, Centre Hospitalier Universitaire Vaudois, CHUV, Lausanne, Switzerland.
- 2019-11-23
Published in:
- Journal of orthopaedic surgery and research. - 2019
Acetabuloplasty
Hilgenreiner’s angle
MRI
Residual hip dysplasia
Acetabulum
Cartilage, Articular
Child
Child, Preschool
Female
Hip Dislocation, Congenital
Humans
Infant
Magnetic Resonance Imaging
Male
Pilot Projects
Retrospective Studies
English
PURPOSE
In case of residual hip dysplasia (RHD) in children, pelvic radiographs are sometimes insufficient to precisely evaluate the entire coverage of the femoral head, when trying to decide on the need for further reconstructive procedures.
METHODS
This study retrospectively compares the bony and the cartilaginous acetabular angle of Hilgenreiner (HTE) of 60 paediatric hips on pelvic MRI separated in two groups. Group 1 included 31 hips with RHD defined by a bony HTE > 20°. Group 2 included 27 hips with a HTE < 20°. They were compared by introducing a new ratio calculated from the square of cartilaginous HTE above the bony HTE on frontal MRI. The normal upper limit for this acetabular angle ratio was extrapolated from the published normal values of cartilaginous HTE and bony HTE in children.
RESULTS
The acetabular angle ratio was statistically significantly increased in the hips with RHD with a mean value of 7.1 ± 4.7 compared to the hips in the control group presenting a mean value of 2.1 ± 1.9 (p < 0.00001).
CONCLUSIONS
This newly introduced ratio seems to be a helpful tool to orientate the further treatment in children presenting borderline RHD.
In case of residual hip dysplasia (RHD) in children, pelvic radiographs are sometimes insufficient to precisely evaluate the entire coverage of the femoral head, when trying to decide on the need for further reconstructive procedures.
METHODS
This study retrospectively compares the bony and the cartilaginous acetabular angle of Hilgenreiner (HTE) of 60 paediatric hips on pelvic MRI separated in two groups. Group 1 included 31 hips with RHD defined by a bony HTE > 20°. Group 2 included 27 hips with a HTE < 20°. They were compared by introducing a new ratio calculated from the square of cartilaginous HTE above the bony HTE on frontal MRI. The normal upper limit for this acetabular angle ratio was extrapolated from the published normal values of cartilaginous HTE and bony HTE in children.
RESULTS
The acetabular angle ratio was statistically significantly increased in the hips with RHD with a mean value of 7.1 ± 4.7 compared to the hips in the control group presenting a mean value of 2.1 ± 1.9 (p < 0.00001).
CONCLUSIONS
This newly introduced ratio seems to be a helpful tool to orientate the further treatment in children presenting borderline RHD.
- Language
-
- English
- Open access status
- gold
- Identifiers
-
- DOI 10.1186/s13018-019-1441-1
- PMID 31752955
- Persistent URL
- https://sonar.ch/global/documents/44381
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