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Abstract(s)
Introdução: existem situações forenses envolvendo exposição a altas temperaturas, nomeadamente por ação de chamas, em que ocorre uma significativa destruição corporal do cadáver. A caracterização dos tecidos mineralizados e dos materiais dentários torna-se particularmente relevantes nestes casos, na medida em que poderá permitir ate o estabelecimento de uma correlação com a temperatura de exposição a que esteve sujeito o cadáver. Em situações extremas de temperatura elevadas, a identificação dentaria, per si, pode tornar-se impossível, principalmente quando ocorre uma completa destruição dos dentes ou quando os registos clínicos ante mortem são inexistentes. Devendo preferencialmente proceder-se a análise dos dentes, tendo em conta a sua excelência em termos de preservação.
Objetivos: Observar as mudanças macroestruturais e radiográficas dos tecidos dentários e dos materiais de restauração dentária utilizados na atualidade, ao serem submetidos a diferentes temperaturas. Verificar a capacidade de as alterações observadas serem utilizadas a nível da identificação forense, nomeadamente em casos de cadáveres queimados, carbonizados ou incinerados.
Materiais e métodos: Realizou-se um estudo experimental in vitro para observar as mudanças físicas macroscópicos e radiográficos dos tecidos dentários e alguns materiais dentários. O protocolo proposto envolve 36 dentes humanos divididos em 3 grupos, de 12 dentes restaurados com de amálgama, resina composta e ionómero de vidro, estos dentes foram submetidos a 3 faixas de temperatura (600°C, 900°C e 1100°C) o que corresponde a dentes para cada temperatura proposta.
Resultados: Os tecidos e os materiais dentários estudados nesta investigação apresentam grande resistência em altas temperaturas sem variar consideravelmente sua macroestructura, de tal maneira que as mudanças físicas (estabilidade dimensional, fissuras, gretas, fraturas, textura, cor, carbonização e incineração) podem chegar-se a identificar e associar-se à cada faixa de temperatura específica. Conclusão: Os tecidos e os materiais dentários apresentam grande resistência em ação de altas temperaturas. Do mesmo modo, apresentam mudanças específicas (cor, textura, fissuras, gretas, fraturas e fragmentação) que podem contribuir com o processo de identificação de um cadáver ou restos humanos queimados, incinerados ou carbonizados.
In forensic situations involving exposure to high temperatures, in particular by the action of fire, a significant destruction of the cadaver occurs. The characterization of the mineralized tissues and dental restoration materials becomes particularly important in these cases, as it correlates with the temperature to which the corpse was exposed. In extreme situations of high temperature dental identification may be impossible, especially when a complete destruction of the tooth occurs or when ante mortem clinical records are nonexistent. Preferentially, we should proceed with the analysis of the teeth, taking into account their excellence in terms of preservation. Objectives: To observe the macro-structural and radiographic changes of the dental tissues and dental restoration materials used at present, when subjected to different temperatures. Checked the capacity of the observed alterations being used at the level of forensic identification, jointly in cases of cadavers burned, cribbed or incinerated. Materials and methods: An in vitro experimental study was carried out to observe the macroscopic and radiographic physical changes of the dental tissues and some dental materials. The protocol involved wrapped 36 human teeth divided into 3 groups, of 12 teeth restored with amalgam, composite resin and glass ionomer, these teeth were subjected to 3 temperature ranges (600 ° C, 900 ° C and 1100 ° C) which correspond to teeth for each propustate temperature. Results: The tissues and dentinal materials studied in this research present great resistance at high temperatures without significantly varying their macrostructure, so that physical changes (dimensional stability, cracks, cracks, fractures, texture, color, carbonization and incineration) can get to identify and associate with each specific temperature range. Conclusion: The tissues and dental materials present great resistance in action of high temperatures. In the same way, they present specific changes (color, texture, fissures, cracks, fractures and fragmentation) that can contribute to the process of identifying a corpse or human remains burned, incinerated or charred.
In forensic situations involving exposure to high temperatures, in particular by the action of fire, a significant destruction of the cadaver occurs. The characterization of the mineralized tissues and dental restoration materials becomes particularly important in these cases, as it correlates with the temperature to which the corpse was exposed. In extreme situations of high temperature dental identification may be impossible, especially when a complete destruction of the tooth occurs or when ante mortem clinical records are nonexistent. Preferentially, we should proceed with the analysis of the teeth, taking into account their excellence in terms of preservation. Objectives: To observe the macro-structural and radiographic changes of the dental tissues and dental restoration materials used at present, when subjected to different temperatures. Checked the capacity of the observed alterations being used at the level of forensic identification, jointly in cases of cadavers burned, cribbed or incinerated. Materials and methods: An in vitro experimental study was carried out to observe the macroscopic and radiographic physical changes of the dental tissues and some dental materials. The protocol involved wrapped 36 human teeth divided into 3 groups, of 12 teeth restored with amalgam, composite resin and glass ionomer, these teeth were subjected to 3 temperature ranges (600 ° C, 900 ° C and 1100 ° C) which correspond to teeth for each propustate temperature. Results: The tissues and dentinal materials studied in this research present great resistance at high temperatures without significantly varying their macrostructure, so that physical changes (dimensional stability, cracks, cracks, fractures, texture, color, carbonization and incineration) can get to identify and associate with each specific temperature range. Conclusion: The tissues and dental materials present great resistance in action of high temperatures. In the same way, they present specific changes (color, texture, fissures, cracks, fractures and fragmentation) that can contribute to the process of identifying a corpse or human remains burned, incinerated or charred.
Description
Keywords
Medicina dentária forense Identificação humana Tecidos dentários Materiais dentários Altas temperaturas Forensic dental medicine Human identification Dental tissues Dental materials High temperatures