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Year : 2017  |  Volume : 2  |  Issue : 2  |  Page : 62-66

Morphologic and radiographic changes in teeth and restorations subjected to high temperatures

Department of Oral Medicine and Radiology, KLE Society's Institute of Dental Sciences, Bengaluru, Karnataka, India

Correspondence Address:
Dr. Praveen Birur
Department of Oral Medicine and Radiology, KLE Society's Institute of Dental Sciences, Bengaluru, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 110.4103/ijfo.ijfo_15_17

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Context: In fire accidents and cremation, fires may reach temperatures as high as 1150°C. In such circumstances, teeth and bones are the only remains which can help in personal identification, as teeth and restorations are unique to an individual. Aims: This study was conducted to assess morphological and radiographic appearances of teeth at various high temperatures. Settings and Design: This was an in vitro observational study; 160 extracted teeth were included in the study. The teeth were randomly classified into four groups of 40 teeth each. Teeth in Group 1 were retained without any restorations. A total of 60 teeth were endodontically sealed with zinc oxide eugenol sealer and restored with gutta-percha; coronal restorations were made with amalgam, light cure composite, or restorative glass ionomer cement. Radiographs of all teeth were obtained. Subjects and Methods: A burnout furnace was used for heating the teeth. Forty teeth each were heated to 200°C, 400°C, 600°C, and 800°C. The teeth and restorations were physically examined, and radiographs of all teeth were again obtained and correlated with the preincineration radiographs. Results: Teeth showed progressive discoloration from black to white, with the development of cracks and crowns shattered by 800°C. Restoration lost their marginal adaptation. On radiographs, initially, crowns developed fissures, followed by the roots. Conclusion: This study documented morphological and radiographic changes occuring in teeth when exposed to high temperatures.

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