<研究論文>保存による皮質骨の破壊じん性の変化に関する一考察

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To establish a preventive method against injuries caused by sports, it is necessary to clarify fracture characteristics of tissues. The object of this study was to examine the effect of formalin preservation on fracture toughness of cortical bone. Samples were taken from haversian bone and plexiform bone in the vicinity of the posterior portion of one-third of the shaft of the bovine femur center. A compact tension specimen of 16-mm width was manufactured from the diaphysis by machining. Specimens processed and tested within 5 days under the freezing condition at a temperature of +30℃ were assigned to the normal group. Specimens of the formalin preservation group were prepared in the same way as the normal group specimen and preserved in 250 ml of a 10% formaldehyde solution. The period of formalin preservation was 2,5,15,30,60 or 90 days. An Instron material testing machine, Model 1000,was used for the fracture toughness test and the loading rate was set at 5mm/min. In an early stage, it was confirmed that fracture toughness of the cortical bone decreased with the highest figure showing a 28% reduction in fracture toughness when the method of formalin preservation was applied. This reduction occurred in a comparatively short period of about 15 days. In 90 days, fracture toughness increased again with an increase of period preservation. The results obtained in this experiment at study well expressed the accurate simulation model of bone fracture development using by finite element analysis.
東海大学の論文

<研究論文>保存による皮質骨の破壊じん性の変化に関する一考察

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