Abstract
Effects of collagen fiber orientation in bending and impact properties of bones A study was performed of the relationship between the mechanical properties of rabbit femurs in three-point bending and impact tests, and of collagen fiber orientation, as well as the proportion between absorbed energy in both tests. Maximum limit, proportional limit, stiffness, resiliency, and tenacity were measured in 20 left rabbit femurs by three point bending tests, and absorbed energy was measured in 20 right rabbit femurs by impact tests. Collagen fiber orientation was estimated using polarized light. Regression analysis showed that in bending, stiffness has significant positive correlation (r = 0.43) and resiliency has significant negative correlation (r = –0.46) with collagen fiber orientation. The absorbed energy in impact showed no significant correlation with collagen fiber orientation. The absorbed energy in impact tests was 4.73 times the absorbed energy in three point bending tests.
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