Understanding the Crystallinity Indices Behavior of Burned Bones and Teeth by ATR-IR and XRD in the Presence of Bioapatite Mixed with Other Phosphate and Carbonate Phases

Author:

Piga Giampaolo1,Gonçalves David234,Thompson T. J. U.5,Brunetti Antonio1,Malgosa Assumpció6,Enzo Stefano7

Affiliation:

1. Department of Political Science, Communication, Engineering and Information Technologies, University of Sassari, Viale Mancini 5, 07100 Sassari, Italy

2. Research Centre for Anthropology and Health (CIAS) and Department of Life Sciences, Universidade de Coimbra, Calçada Martim Freitas, 3000-456 Coimbra, Portugal

3. Laboratory of Forensic Anthropology, Department of Life Sciences, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Calçada Martim Freitas, 3000-456 Coimbra, Portugal

4. Laboratório de Arqueocièncias, Direcção General do Património Cultural and LARC/CIBIO/InBIO, Rua da Bica do Marquês 2, 1300-087 Lisbon, Portugal

5. School of Science & Engineering, Teesside University, Borough Road, Middlesbrough TS1 3BA, UK

6. Unitat d’Antropologia Biologica, Department de Biologia Animal, Biologia Vegetal i Ecologia, Universitat Autonoma de Barcelona, Edifici C, Bellaterra, 08193 Barcelona, Spain

7. Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy

Abstract

We have critically investigated the ATR-IR spectroscopy data behavior of burned human teeth as opposed to the generally observed behavior in human bones that were subjected to heat treatment, whether deliberate or accidental. It is shown that the deterioration of the crystallinity index (CI) behavior sometimes observed in bones subjected to high temperature appears to be of higher frequency in the case of bioapatite from teeth. This occurs because the formation of the β-tricalcium phosphate (β-TCP) phase, otherwise known as whitlockite, clearly ascertained by the X-ray diffraction (XRD) patterns collected on the same powdered specimens investigated by ATR-IR. These results point to the need of combining more than one physicochemical technique even if apparently well suitable, in order to verify whether the assumed conditions assessed by spectroscopy are fully maintained in the specimens after temperature and/or mechanical processing.

Publisher

Hindawi Limited

Subject

Rehabilitation,Physical Therapy, Sports Therapy and Rehabilitation,General Medicine

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