TY - JOUR
T1 - Heat Induced Changes to Dental Resin Composites: A Reference in Forensic Investigations?
AU - Brandão, Renata
AU - Martin, Carmen C.S.
AU - Catirse, Alma
AU - De Castro e Silva, Marcio
AU - Evison, Martin
AU - Guimarães, Marco Aurélio
PY - 2007/7
Y1 - 2007/7
N2 - The objective was to investigate color change and surface damage in dental resin composites exposed to high temperatures over different time intervals for comparative purposes. Samples were prepared using two resins - Z100® (R1) and Charisma ® (R2), heated at the following temperatures: 200°C, 400°C, 600°C, 1000°C, for 15, 30 and 45 min (n = 104 for each resin sample). Color (ΔE*) and brightness (ΔL*) changes were analyzed by spectrophotometry using the CIE L*a*b* system and surface changes by Scanning Electron Microscopy (SEM). R1 showed more intense color changes after heat exposure than R2. ΔL* values were found to be the best parameter for evaluation of light and color change. A biphasic pattern after thermal exposure was detected, from dark brown to light white. SEM showed more intense alterations in R2 than in R1. These results indicate that the parameters observed in both resins are useful as a guide in forensic analyses.
AB - The objective was to investigate color change and surface damage in dental resin composites exposed to high temperatures over different time intervals for comparative purposes. Samples were prepared using two resins - Z100® (R1) and Charisma ® (R2), heated at the following temperatures: 200°C, 400°C, 600°C, 1000°C, for 15, 30 and 45 min (n = 104 for each resin sample). Color (ΔE*) and brightness (ΔL*) changes were analyzed by spectrophotometry using the CIE L*a*b* system and surface changes by Scanning Electron Microscopy (SEM). R1 showed more intense color changes after heat exposure than R2. ΔL* values were found to be the best parameter for evaluation of light and color change. A biphasic pattern after thermal exposure was detected, from dark brown to light white. SEM showed more intense alterations in R2 than in R1. These results indicate that the parameters observed in both resins are useful as a guide in forensic analyses.
KW - forensic science
KW - forensic odontology
KW - composite resin
KW - high temperature
KW - color changes
KW - spectrophotometer
KW - scanning electron microscopy
KW - human identification
KW - dental identification
U2 - 10.1111/j.1556-4029.2007.00474.x
DO - 10.1111/j.1556-4029.2007.00474.x
M3 - Article
VL - 52
SP - 913
EP - 919
JO - Journal of Forensic Sciences
JF - Journal of Forensic Sciences
SN - 0022-1198
IS - 4
ER -