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Our studies with molecular mechanics (MM+ force field) showed different interaction energies of the collagen-like molecule and different models of the apatite crystal planes. Its main typical combustion temperature is at 360˚C with a shoulder at 550˚C compared to the thermal behavior of collagen, with the mean combustion peak at ca. The thermal behavior of bone is very distinctive. Bone tissue results in a loss of thermal stability compared to the collagen studied apart, as a consequence of the degradation and further combustion of the collagen in contact with the apatite microcrystals in bone. The amide I infrared bands of the collagen type I change when interacting to apatite, what might confirm our assumption. We suggest that the amide regions of the type I collagen molecule (mainly C=O groups of the peptide bonds) will be important in the control of the interactions with the apatite from bone. Scanning electron microscopy shows that bone organic content incinerate gradually through the different temperatures studied. Keywords: Bone, Collagen Type I Apatite Differential Scanning Calorimetry (DSC) Molecular Modeling Fourier Transform Infrared (FTIR) SpectroscopyĪn insight into the interaction of collagen type I with apatite in bone tissue was performed by using differential scanning calorimetry, Fourier transform infrared spectroscopy, and molecular modeling. Received 13 January 2013 revised 11 March 2013 accepted 16 April 2013 This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. México, MéxicoĮmail: © 2013 Alejandro Heredia et al. México, MéxicoĦDepartamento de Fisica de Plasmas y de Intearcción de Radiación con la Materia, Instituto de Ciencias Nucleares, UNAM, D.F. México, MéxicoĥInstituto de Biotecnología, UNAM, D.F. México, MéxicoĤDepartamento de Estado Sólido, Instituto de Física, Universidad Nacional Autónoma de México (UNAM), D.F. México, MéxicoĢNanotechnology Research Division, Centre for Mechanical Technology & Automation, University of Aveiro, Aveiro, PortugalģS.I.O.V.
1Departamento de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, UNAM, D.F.
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