Bone mineral crystallisation kinetics

C. Greenwood, K. Rogers, S. Beckett, J. Clement
2012 Journal of materials science. Materials in medicine  
The kinetics of bone apatite crystallisation are examined using a novel approach to obtain quantitative, direction dependence features such as growth rate and activation energy. X-ray diffraction was employed for analysis of bovine, porcine and 'anorganic' bone specimens. Apatite coherence length was utilised as the independent variable within a Johnson-Mehl-Avrami (JMA) model. A direction averaged crystallisation activation energy of 183 ± 8 kJ mol -1 was observed for the three bone groups.
more » ... Johnson-Mehl-Avrami 'n' exponent decreased with increasing temperature for all bone groups, indicating that apatite crystallisation changes to a diffusion limited process at higher temperatures. The results revealed little evidence to support any organic component 'protective' effect, and, on the contrary indicated that the organic matrix promotes apatite crystallisation.
doi:10.1007/s10856-012-4679-2 pmid:22743865 fatcat:fv2dkg6awneu5nvshaxslqtqfa