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Bone Abstracts (2014) 3 PP36 | DOI: 10.1530/boneabs.3.PP36

Bone biomechanics and quality

Comparing two types of bovine bone composition, structure and hardness based on their ecological effect and nutrition

Negar Gerami Fard, Mohammad Bahrololoom & Fariba Khajouei

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Shiraz University, Shiraz, Iran.


Two kinds of apatite powder were prepared separately from bovine bones originated from different geographical and ecological areas with different climates, in order to characterize and compare their components, hardness and structures by burning them and heat treating the bone ashes at 850 °C in an air furnace. The black ashes were converted to white and yellow–white powders. X-ray diffraction (XRD) analysis indicate that the white powder was carbonate–hydroxyapatite and the yellow white powder was fluorapatite. Neither of the samples contained any organic components of bone. X-ray analysis revealed that calcium and phosphorous were the main elements for both powders and sodium and fluoride were presented as minor impurities in fluorapatite powder.

Furthermore, the micro-hardness tests on both types of bone revealed that the bone which was composed of fluorapatite was about twice harder than the bone which was composed of carbonate-hydroxyapatite. Fluoride and sodium in the former cause more symmetric, dense and as a result harder structure.

Table 1 Hardness.
Sample composed of carbonate-hydroxyapatiteSample composed of fluorapatite
Force: 50 gfForce: 100 gfForce: 50 gfForce:100 gfForce: 200 gf
Hardness (Vickers): 16.6, 15.2, 16.8, 14.9, 15.3, 16.6, 15.2, 16.8 Average: 15.92Hardness (Vickers): 16.4, 16.2, 16.9, 17.4, 17.6, 16.4, 16.2, 16.9 Average: 16.75Hardness (Vickers): 27.5, 27.4, 30.2 Average: 28.3Hardness (Vickers): 33.3, 32.4, 36.4, 29.8, 29.1, 32.2, 31.4 Average: 32.08Hardness (Vickers): 26.7, 29.7, 31.7, 32.5 Average: 30.15
Average: 16.33Average: 30.71

Volume 3

European Calcified Tissue Society Congress 2014

Prague, Czech Republic
17 May 2014 - 20 May 2014

European Calcified Tissue Society 

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