Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel.
Department of Oral Biology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
Sci Rep. 2024 Oct 27;14(1):25597. doi: 10.1038/s41598-024-77717-8.
Dynamic bone-crushing, exemplified by the pig bone rib, is characterized thermo-mechanically in relation to the bone's microstructural characteristics. The cortical bone's dominant role consists of shielding the trabecular component by resisting deformation, sustaining high load levels, and ultimately cracking. Here we present a qualitative factual study to show that this behavior is the absolute opposite of its quasi-static counterpart in which the trabecular bone was found to play the dominant role. Using infrared thermography, we observed for the first time a significant localized temperature rise of up to 11 degrees Celsius in both cortical and trabecular damaging regions. Such observations call for additional clinically oriented research. Such a high contrast between static and dynamic failure mechanisms was not reported previously, and it paves the way for forensic-oriented studies in which the nature of the sustained load must be determined.
动态骨破坏，以猪肋骨为例，在热机械方面与骨骼的微观结构特征有关。皮质骨的主要作用是通过抵抗变形来保护小梁成分，维持高负荷水平，最终导致破裂。在这里，我们进行了一项定性的实证研究，以表明这种行为与准静态破坏完全相反，在准静态破坏中，小梁骨发挥了主导作用。我们首次使用红外热成像技术观察到，在皮质和小梁破坏区域，温度显著升高，最高可达 11 摄氏度。这些观察结果需要进行更多的临床导向研究。以前没有报道过这种静态和动态破坏机制之间的巨大差异，这为法医学研究铺平了道路，必须确定持续负荷的性质。
