Effects of high temperatures on different dental restorative systems: Experimental study to aid identification processes

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Published Jun 1, 2009
https://doi.org/10.4103/0974-2948.50883
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Volume 1, Issue 1, January-June 2009

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Sandra Moreno
Oral and Maxillofacial Surgery Research Group (Dental Anthropology and Forensic Dentistry Research Line) of the Dentistry School, University of Valle
Giuseppe Merlati
Dental Materials Unit, Department of Odontostomatology, University of Pavia
Liliana Marin
Specialized Identification Laboratory, General Office of the Public Prosecutor of the Nation
Caterina Savio
Dental Materials Unit, Department of Odontostomatology, University of Pavia
Freddy Moreno
Oral and Maxillofacial Surgery Research Group (Dental Anthropology and Forensic Dentistry Research Line) of the Dentistry School, University of Valle

Abstract

This "in vitro" study was to observe the effects of high temperatures on teeth restored by (1) amalgam overlaying glass ionomer bases, (2) composite/adhesive system overlaying glass ionomer bases, (3) ZnO modified temporary filling material vs. unrestored teeth. Fifty un-restored teeth (control group), 50 teeth with class I amalgam restorations and glass ionomer bases, 50 teeth with class I composite/adhesive system restorations and glass ionomer bases and 50 teeth with class I ZnO modified temporary filling material restorations were placed in a furnace and heated at a rate of 10°C/min. The effects of the predetermined 200, 400, 600, 800, 1000 and 1200°C temperatures were examined macroscopically and then observed microscopically by means of a stereomicroscope.Our observations showed that the class I restorations made of amalgam on glass ionomer bases as far as the class I restorations made of ZnO modified temporary filling material can be identified till 1200°C because they maintain their shape despite the disintegration of the crowns, whilst the class I composite/adhesive system and the underplayed glass ionomer bases remained in place in an altered shape.

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How to Cite
Sandra Moreno, Giuseppe Merlati, Liliana Marin, Caterina Savio, & Freddy Moreno. (2009). Effects of high temperatures on different dental restorative systems: Experimental study to aid identification processes. Journal of Forensic Dental Sciences, 1(1), 17–23. https://doi.org/10.4103/0974-2948.50883
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