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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2012

Nonlinear resonant ultrasound spectroscopy is sensitive to the level of cortical bone damage

Résumé

The objective of the study was to evaluate the sensitivity of nonlinear resonant ultrasound spectroscopy (NRUS) measurements to the accumulation of damage in cortical bone by fatigue or by controlled crack propagation. Two groups of human cortical bone specimens were prepared from the femoral mid-diaphysis. The specimens from the first group were taken through a progressive fatigue protocol consisting of four steps of cyclic four-point bending. The specimens from the second group were taken through a toughness protocol consisting of initiation and controlled propagation of a stable crack induced by 4-point bending mechanical loading. Our results evidenced a progressive increase of the normalized nonlinear elastic parameter during fatigue testing or during toughness experiments. While in specimens subjected to mechanical fatigue cycling the relative variation of nonlinear elasticity was significantly related to the relative variation of the number density of small cracks assessed with micro-computed tomography, in crack propagation experiments a significant relationship was found between the level of nonlinearity and total crack length. These results strongly suggest that NRUS measurements are sensitive to damage accumulation and can be used as a marker of bone damage.
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Dates et versions

hal-00798009 , version 1 (07-03-2013)

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Sylvain Haupert, Sandra Guerard, David Mitton, Françoise Peyrin, Pascal Laugier. Nonlinear resonant ultrasound spectroscopy is sensitive to the level of cortical bone damage. Journal of the Acoustical Society of America, 2012, 131 (4), pp.3458. ⟨10.1121/1.4709030⟩. ⟨hal-00798009⟩
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