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Investigation of the Effect of Spinal Defects on Spondylolysis and Stress Fracture of Vertebral Bodies


M.S. Yeoman1 C. Quah2 A. Cizinauskas1 K. Cooper1 D. McNally5 B. Boszczyk2
1Continuum Blue, Tredomen, Ystrad Mynach, United Kingdom
2The Centre for Spinal Studies and Surgery, Queen’s Medical Centre, Nottingham, United Kingdom
5Bioengineering Research Group, Faculty of Engineering, The University of Nottingham, Nottingham, United Kingdom


SBO model adapted from Intact case.

Spondylolysis (SL) is a defect of the spinal vertebra, and is typically caused by stress fracture of the pars interarticularis bone of the vertebral arch. It is especially common in adolescents who over train in sporting activities. Spina bifida occulta (SBO) is a malformation of the spine where the protruding vertebral bodies are not fully formed. In this study we demonstrate the predisposition of SL associated with SBO, by showing that fatigue failure limits in the pars interarticularis bone of the vertebral arch are reached in the case of Spina bifida occulta (SBO) patients subjected to complex loading conditions corresponding to normal sporting activities.

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