Bone mineral dissolution is a highly complex process due to large chemical and structural heterogeneity of bone tissue. To better understand this process, we have studied in detail the demineralization of different avian bone types (cortical and medullary bone) that have large differences in bone mineral chemistry, organic matrix composition and structure. We have followed chemical and structural changes occurring during demineralization using optical and electron microscopy, two-dimensional (2D) X-ray diffraction, and infrared spectroscopy. During demineralization, there was a selective dissolution of poorly crystalline bone mineral rich in labile carbonate that is associated to less mature and highly reactive bone tissue. Medullary bone mineral, which is poorly organized and has lesser crystallinity, dissolves much more rapidly than cortical bone mineral, which is highly organized and has a greater crystallinity. Differences in crystallinity cannot explain alone the extremely large differences in the solubility of the mineral in these two types of bone. Bone organic matrix composition and its structural relationship with the mineral in medullary bone could explain its greater solubility. The information obtained in this study can help to better understand the dynamics of bone chemistry during remodeling as well as bone mineral alteration processes in natural environments.
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Research Article|
March 01, 2019
Changes in avian cortical and medullary bone mineral composition and organization during acid-induced demineralization
Nazaret Dominguez-Gasca;
Nazaret Dominguez-Gasca
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
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Cristina Benavides-Reyes;
Cristina Benavides-Reyes
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
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Estefanía Sánchez-Rodríguez;
Estefanía Sánchez-Rodríguez
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
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Alejandro B. Rodríguez-Navarro
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
Corresponding author, e-mail: anava@ugr.es
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Nazaret Dominguez-Gasca
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
Cristina Benavides-Reyes
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
Estefanía Sánchez-Rodríguez
1
Departamento de Mineralogía y Petrología, Universidad de Granada
, 18002Granada, Spain
Corresponding author, e-mail: anava@ugr.es
Publisher: Deutsche Mineralogische Gesellschaft, Sociedad Española de Mineralogia, Societá Italiana di Mineralogia e Petrologia, Société Francaise de Minéralogie
Received:
07 May 2018
Revision Received:
23 Oct 2018
Accepted:
30 Oct 2018
First Online:
22 Dec 2018
Online ISSN: 1617-4011
Print ISSN: 0935-1221
© 2018 E. Schweizerbart’sche Verlagsbuchhandlung, 70176 Stuttgart, Germany
European Journal of Mineralogy (2019) 31 (2): 209–216.
Article history
Received:
07 May 2018
Revision Received:
23 Oct 2018
Accepted:
30 Oct 2018
First Online:
22 Dec 2018
Citation
Nazaret Dominguez-Gasca, Cristina Benavides-Reyes, Estefanía Sánchez-Rodríguez, Alejandro B. Rodríguez-Navarro; Changes in avian cortical and medullary bone mineral composition and organization during acid-induced demineralization. European Journal of Mineralogy 2019;; 31 (2): 209–216. doi: https://doi.org/10.1127/ejm/2019/0031-2826
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Index Terms/Descriptors
- alkaline earth metals
- apatite
- Aves
- biomineralization
- bones
- calcium
- chemical composition
- Chordata
- collagen
- crystallinity
- electron microscopy data
- experimental studies
- hydrochloric acid
- infrared spectra
- inorganic acids
- living taxa
- matrix
- metals
- mineral composition
- organic compounds
- phosphates
- phosphorus
- proteins
- resorption
- solubility
- spectra
- Tetrapoda
- Vertebrata
- X-ray diffraction data
- demineralization
- medullary bone
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