Summary
A cross sectional and longitudinal study of 315 children with achondroplasia showed that thoracolumbar kyphosis improves significantly during the first three years of age and hyperlordosis at the lumbosacral level is the compensatory mechanism. Pelvic alignment and hip positioning are directly affected by this mechanism. After three years of age, thoracolumbar kyphosis gradually improves until age ten. While pelvic incidence is stable before age ten, it increases gradually afterwards.
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Author disclosures: John A. Heydemann: Merck. Suken Shah: DePuy Synthes Spine; Arthrex, Inc; K2M; Nuvasive; Stryker; Globus Medical; DePuy Synthes Spine via Setting Scoliosis Straight Foundation; Ethicon Endosurgery; K2M via Setting Scoliosis Straight Foundation. Kenneth J. Rogers: None. William G. Mackenzie: Biomarin; DePuy Synthes; Journal of Children’s Orthopedics; Journal of Pediatric Orthopedics. Oussama Abousamra: None. Tyler Kreitz: None. Colleen Ditro: None.
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Heydemann, J.A., Shah, S.A., Rogers, K.J. et al. Paper #24: Natural History of Sagittal Spinal Alignment in Children with Achondroplasia. Spine Deform 4, 457–458 (2016). https://doi.org/10.1016/j.jspd.2016.09.029
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DOI: https://doi.org/10.1016/j.jspd.2016.09.029