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Revista da Associacao Paulista de Cirurgioes Dentistas

versão impressa ISSN 0004-5276

Resumo

MOREIRA, Synara Soares; CUNHA, Bruno Silva da; BASTOS NETO, Fabio Valverde Rodrigues  e  MACEDO, Adriana Furtado. Morphostructural analysis of biomaterials for assistance in the human identification process. Rev. Assoc. Paul. Cir. Dent. [online]. 2016, vol.70, n.3, pp. 306-311. ISSN 0004-5276.

The aim of this study was to evaluate the changes of restorative and prosthetic biomaterials subjected to high temperatures for the establishment of physical parameters that assist in cases of charred bodies in human identification. The sample of the experimental in vitro study was composed by 40 specimens divided into 4 groups: GI (specimens of cements of ionomer of chemical glass), GII (silver amalgam), GIII (hybrid composite resin) and GIV (copper alloy aluminum). The specimens were subjected to temperatures of 300°C, 500°C, 700°C and 900°C. After incineration the biomaterials were submitted macroscopic analysis on changes of structure, color, shape and dimensional stability and all data were analyzed by ANOVA and Dunn's test (p <0.05). Regarding the radiopacity there was statistically significant difference for the mean radiographic density in GI temperatures within 700°C and 900°C; GIV temperatures within 300°C and 900°C, 500°C and 900°C. The GII has reached its melting point at 700ºC with powdery appearance and isolated stores of mercury at 900°C. The GIII had structural change at 700°C and 900°C. In GIV it not observed significant changes. Thus, one can gather that the micro hybrid composite resin and amalgam exhibit severe morphostructural changes while the glass ionomer aluminum and copper does not undergo significant changes in their original characteristics. The changes undergone by materials provide relevant data to aid in the identification process of human bodies charred.

Palavras-chave : forensic dentistry; victims identification; incineration; dental materials..

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