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Study of the Mechanical Properties of Bones Under Fracture Healing Conditions with Specific Medical Treatments, Using 4 Point Bending Tests and Ultra-Micro Indentation Techniques

机译:使用4点弯曲试验和超微微压痕技术研究骨折愈合条件下骨骼骨骼的力学性能研究

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This paper aims to compare the effectiveness of two medical treatments in healing an induced pseudoarthrosis (bone fracture without direct contact thus driving a callus formation) on the right femurs of Sprague Dawley laboratory rats. To further understand and quantify the mechanical effects of each treatment, the bone mechanical properties were analysed in terms of the following parameters: hardness and elastic modulus using ultra-micro indentation tests, and maximum force, energy absorbed up to maximum force and rigidity using four point bending tests. To assess the effectiveness of the treatments in terms of mechanical performance, the results were compared against a control group and a regular bone fracture (direct contact between broken bone parts without a gap). Both treatments were successful in restoring properties similar to the control group in terms of overall hardness (in both cortical and trabecular bone tissues) and rigidity. However, one of them appears to provide higher values of maximum force, energy absorbed and bone hardness. The results provide information that can be extrapolated to further understand the treatment of human bone fractures in terms of mechanical properties. The data enables the comparison of the outcomes that both treatments have on the biomechanical functioning of bone fractures.
机译:本文旨在两个医疗治疗的有效性比较愈合诱导假(骨折而不从而驱动一个愈伤组织形成直接接触)上的Sprague Dawley实验室大鼠的右股骨。为了进一步理解和量化每个处理的机械效应,骨的机械性能在下列参数方面进行了分析:硬度和使用超微压痕测试弹性模量,和最大的力,能量吸收多达最大的力和刚性使用四个三点弯曲试验。为了评估治疗在机械性能方面的有效性,结果与对照组和常规骨折(无间隙地破骨部分之间的直接接触)进行比较。这两种治疗方法成功地恢复类似于在整体硬度方面,对照组(在皮质和骨小梁的组织)和刚性性质。然而,它们中的一个似乎提供的最大的力更高的值,能量吸收和骨的硬度。该结果提供了可以外推到进一步理解在机械性能方面的人骨骨折的治疗信息。该数据使得能够两种治疗有骨折的生物力学运作的结果的比较。

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