Objective: To analyze the features of coverage of femoral head at
weight-bearing interface of the hip joints in children. Material and Methods: MRI scans of the hips were performed in 95
normal children aged from 1 to 8 years. Radial scans of the hip joints were
performed using FFE sequence. Review the morphological features of
weight-bearing interface of the acetabulum and the femoral head. Total covering
angle (TCA), acetabular covering angle (ACA) and labral covering angle (LCA)
were measured, inter-group comparison and correlation analysis were done. Result: The acetabulum and the femoral
head had congruent articulating surface at each weight-bearing position. There
was no statistical TCA difference at each position. Average ACA increased,
while average LCA decreased from anterior to posterior. TCA correlated with
LCA, ACA negatively correlated with LCA. Conclusion:
TCA is a good index in indicating stability of the hip joint. Cartilage
ossifies slower at posterior than anterior positions. Cartilage acetabulum and
the labrum serve as complementary structures that contribute in total stabilizing
of the hip joint in development.
Cite this paper
S. Zeng, H. Liu, H. Xu, Y. Chen, D. Miao and L. Nie, "Coverage of Femoral Head at Weight-Bearing Interface of the Hip Joint in Children: An MRI Analysis," Open Journal of Medical Imaging, Vol. 3 No. 2, 2013, pp. 60-64. doi: 10.4236/ojmi.2013.32008.
 C. Birkenmaier, G. Jorysz, V. Jansson, et al., “Normal Development of the Hip: A Geometrical Analysis Based on Planimetric Radiography,” Journal of Pediatric Orthopaedics, Vol. 19, No. 1, 2010, pp. 1-8.
 S. Tamura, T. Nishii, T. Shiomi, et al., “Three-Dimensional Patterns of Early Acetabular Cartilage Damage in Hip Dysplasia; A High-Resolutional CT Arthrography Study,” Osteoarthritis and Cartilage, Vol. 20, No. 7, 2012, pp. 642-652.
 P. Than, T. Sillinger, J. Kranicz, et al., “Radiographic Parameters of the Hip Joint from Birth to Adolescence,” Pediatric Radiology, Vol. 34, No. 3, 2004, pp. 237-244.
 Motoyuki Horii, Toshikazu Kubo, Shigehiro lnoue, et al., “Coverage of the Femoral Head by the Acetabular Labrum in Dysplastic Hips: Quantitative Analysis with Radial MR Imaging,” Acta Orthopaedica, Vol. 74, No. 3, 2003, pp. 287-292. doi:10.1080/00016470308540842
 C. Zilkens, F. Miese, M. Jäger, et al., “Magnetic Resonance Imaging of Hip Joint Cartilage and Labrum,” Orthopedic Reviews, Vol. 3, No. 2, 2011, p. e9.
 K. Ueshimaa, K. A. Takahashia, M. Fujiokaa, et al., “Relationship between Acetabular Labrum Evaluation by Using Radial Magnetic Resonance Imaging and Progressive Joint Space Narrowing in Mild Hip Dysplasia,” Magnetic Resonance Imaging, Vol. 24, No. 5, 2006, pp. 645-650.
 M. C. Lee and C. P. Eberson, “Growth and Development of the Child’s Hip,” Orthopedic Clinics of North America, Vol. 37, No. 2, 2006, pp. 119-132.
 M. J. Graves, S. Wakely, P. W. Bearcroft, et al., “MR-Guided Direct Arthrography of the Hip,” Journal of Magnetic Resonance Imaging, Vol. 8, No. 2, 2008, pp. 462-465. doi:10.1002/jmri.21432
 D.-M. Sun, S.-N. Pan, Z.-M. Lu, et al., “3.0T MRI Features of Normal Acetabular Labrum in Children,” Chinese Journal of Medical Imaging Technology, Vol. 26, No. 3, 2010, pp. 532-534.
 A. N. Larson, B. Tabenhorst, A. De La Rocha, et al., “Limited Intraobserver and Interobserver Reliability for the Common Measures of Hip Joint Congruency Used in Dysplasia,” Clinical Orthopaedics and Related Research, Vol. 470, No. 5, 2012, pp. 1414-1420.
 S.-H. Zeng, H.-S. Liu, H.-W. Xu, et al., “Quantitative MRI Analysis of Normal Development of the Hip in Children,” Chinese Journal of Medical Imaging Technology. Vol. 27, No. 7, 2011, pp. 40-44.