Fluorescence and Structural Degradation in Composite Resins as a Function of Temperature* |
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Authors: | Christi N. Rattle B.S. Mary A. Bush D.D.S. |
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Affiliation: | 1. Chemistry Department, SUNY Buffalo State College, 1300 Elmwood Ave, Buffalo, NY 14222.;2. Laboratory for Forensic Odontology Research, School of Dental Medicine, SUNY at Buffalo, B1 Squire Hall, S. Campus, Buffalo, NY 14214. |
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Abstract: | Abstract: Detecting composite resin upon postmortem examination can be difficult. Ultraviolet illumination has been suggested to ease location of this material; however, this may not be advisable in incineration situations. Understanding of the chemical and physical properties of resin as a function of temperature is an important parameter in identification of this material in incineration circumstances. Twenty-seven discs of resin, Quixx (Dentsply), Filtek Supreme (3 M), and Tetric Ceram (Ivoclar) were prepared and exposed to increasing heating conditions of 200°C–900°C in 100°C increments for 30 min. Analysis was performed with Fourier transform infrared spectroscopy, ultraviolet-visible light spectrophotometry, scanning electron microscopy/energy dispersive X-ray spectroscopy, optical microscopy, and UV illumination. Characterization of the material occurred at each temperature range. The organic components and the fluorescence properties were lost at temperatures above 300°C. The inorganic component remained through 900°C. This information can aid in detection of resin in high temperature circumstances. |
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Keywords: | forensic science forensic odontology composite resin incineration fluorescence SEM FTIR |
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