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Войти в исследования Clinical radiology · 2019
Investigating rolling as mechanism for humeral fractures in non-ambulant infants: a preliminary finite element study.
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Altai Z, Viceconti M, Li X, Offiah A C
Аннотация
AIM: To use personalised computed tomography (CT)-based finite element models to quantitatively investigate the likelihood of self-inflicted humeral fracture in non-ambulant infants secondary to rolling.
MATERIALS AND METHODS: Three whole-body post-mortem CT examinations of children at the age of rolling (two 4-month-old and one 6-month-old) were used. The mechanical moment needed by each infant to perform a rolling manoeuvre was calculated and applied to the finite element model in order to simulate spontaneous rolling from the prone to the supine position.
RESULTS: The maximum predicted strains were found to be substantially lower (with a difference of >80%) than the elastic limit of the bone.
CONCLUSION: Results of this study challenge the plausibility of self-inflicted humeral fracture caused by rolling in non-ambulant infants and indicate that it is unlikely for a humeral fracture to result from this mechanism without the assistance of an external force.
MATERIALS AND METHODS: Three whole-body post-mortem CT examinations of children at the age of rolling (two 4-month-old and one 6-month-old) were used. The mechanical moment needed by each infant to perform a rolling manoeuvre was calculated and applied to the finite element model in order to simulate spontaneous rolling from the prone to the supine position.
RESULTS: The maximum predicted strains were found to be substantially lower (with a difference of >80%) than the elastic limit of the bone.
CONCLUSION: Results of this study challenge the plausibility of self-inflicted humeral fracture caused by rolling in non-ambulant infants and indicate that it is unlikely for a humeral fracture to result from this mechanism without the assistance of an external force.