Colour stability of dental restorative materials submitted to conditions of burial and drowning, for forensic purposes

• Published in: The Journal of forensic odonto-stomatology 2018-12, Vol.36 (2), p.20-30
• Main Authors: Vincenti, Sergio Augusto de Freitas, Biancalana, Roberto Cesar, Alves da Silva, Ricardo Henrique, Pires-de-Souza, Fernanda De Carvalho Panzeri
• Format: Article
• Language: English
• Subjects: Original
• ISSN: 0258-414X; 2219-6749

The aim of this study was to evaluate the effect of earth and water on the colour stability of tooth-coloured dental restorative materials: composite resin (CR) and glass ionomer cement (GIC). Aiming to distinguish between one and another tooth-coloured material and to estimate the period in which they could be submitted to the factors earth and water, the proposed method may contribute to the proceedings of human identification of victims of burial and submersion in water. Forty bovine incisors were prepared (6 x 6 x 2mm) and restored with CR Filtek TM Z250 XT (3M ESPE TM ) and GIC Ketac TM Fil Plus (3M ESPE TM ). After initial colour read-outs (VITA TM Easyshade spectrophotometer), the samples were separated into two groups (n=10), according to the conditions to which they were submitted: simulations of burying and submersion in water, for periods of 1, 3, 6 and 12 months, when new read-outs were taken. The values of colour change (ΔE, ΔL*, Δa*, and Δb*) were subjected to 3-way ANOVA statistical analysis, repeated measures, Bonferroni (p