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Identificação em desdentados : utilização de QR Code em próteses removíveis
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Introdução: A identificação de indivíduos desdentados em contexto forense continua a representar um desafio, sobretudo em situações de catástrofe, nas quais os métodos tradicionais de identificação podem encontrar-se comprometidos. A marcação de próteses dentárias tem sido proposta como uma solução eficaz, destacando-se os QR Codes pela elevada capacidade de armazenamento de dados e facilidade de leitura. <br/>O presente estudo teve como objetivo desenvolver e avaliar um método de identificação protética baseado na gravação de QR Codes em metais resistentes a condições extremas. Materiais e Métodos: Foram confecionadas peças protótipo em liga de titânio GR5 e aço inoxidável, nas quais foram gravados a laser QR Codes de diferentes dimensões (7,5 mm x 7,5 mm e 5,0 mm x 5,0 mm). De modo a simular condições reais de utilização algumas peças foram incluídas em resina acrílica. As amostras foram submetidas a ensaios térmicos (600 °C, 800 °C e 1000 °C), químicos (ácido sulfúrico e hidróxido de sódio), análise gravimétrica, ensaios de dureza Vickers e microscopia eletrónica de varrimento. Avaliaram-se a legibilidade dos QR Codes e o comportamento mecânico e corrosivo dos materiais. Resultados: A liga de titânio GR5 apresentou melhor comportamento global do que o aço inoxidável. Os QR Codes gravados na liga de Ti mantiveram-se legíveis após exposição a 800 °C e após 120 horas de imersão em meios corrosivos. Os QR Codes de menores dimensões revelaram maior dificuldade de leitura. O ensaio de dureza Vickers evidenciou uma maior dureza superficial na liga de Ti GR5. Conclusão: O método de identificação desenvolvido demonstrou ser viável para aplicação em próteses removíveis totais, particularmente quando associado à liga de Ti GR5. Os resultados sugerem potencial aplicação clínica e forense, contribuindo para a identificação de indivíduos desdentados em situações de catástrofe.
Introduction: The identification of edentulous individuals in forensic contexts remains a significant challenge, particularly in disaster situations where conventional identification methods may be compromised. Denture marking has been proposed as an effective solution, with QR Codes offering advantages such as high data storage capacity and ease of scanning. The aim of this study was to develop and evaluate a denture identification method based on the laser engraving of QR Codes on metals capable of withstanding extreme conditions. Materials and Methods: Prototype specimens were manufactured from Ti-6Al-4V alloy and stainless steel and were laser-engraved with QR Codes of different sizes (7.5 mm x 7.5 mm and 5.0 mm x 5.0 mm). To simulate real clinical conditions, some specimens were embedded in acrylic resin. The samples were subjected to thermal exposure (600 °C, 800 °C, and 1000 °C), chemical immersion (sulfuric acid and sodium hydroxide), gravimetric analysis, Vickers hardness testing, and scanning electron microscopy. QR Code readability, as well as the mechanical properties and corrosion behaviour of the materials, were evaluated. Results: The Ti-6Al-4V alloy exhibited superior overall performance compared with stainless steel. QR Codes engraved on the titanium alloy remained readable after exposure to 800 °C and after 120 hours of immersion in corrosive media. Smaller QR Codes exhibited reduced readability. Vickers hardness testing revealed higher surface hardness in the Ti-6Al-4V alloy. Conclusion: The identification method developed was shown to be feasible for use in complete removable dentures, particularly when implemented using Ti-6Al-4V alloy. The findings highlight its potential clinical and forensic applications, thereby supporting the identification of edentulous individuals in disaster situations.
Introduction: The identification of edentulous individuals in forensic contexts remains a significant challenge, particularly in disaster situations where conventional identification methods may be compromised. Denture marking has been proposed as an effective solution, with QR Codes offering advantages such as high data storage capacity and ease of scanning. The aim of this study was to develop and evaluate a denture identification method based on the laser engraving of QR Codes on metals capable of withstanding extreme conditions. Materials and Methods: Prototype specimens were manufactured from Ti-6Al-4V alloy and stainless steel and were laser-engraved with QR Codes of different sizes (7.5 mm x 7.5 mm and 5.0 mm x 5.0 mm). To simulate real clinical conditions, some specimens were embedded in acrylic resin. The samples were subjected to thermal exposure (600 °C, 800 °C, and 1000 °C), chemical immersion (sulfuric acid and sodium hydroxide), gravimetric analysis, Vickers hardness testing, and scanning electron microscopy. QR Code readability, as well as the mechanical properties and corrosion behaviour of the materials, were evaluated. Results: The Ti-6Al-4V alloy exhibited superior overall performance compared with stainless steel. QR Codes engraved on the titanium alloy remained readable after exposure to 800 °C and after 120 hours of immersion in corrosive media. Smaller QR Codes exhibited reduced readability. Vickers hardness testing revealed higher surface hardness in the Ti-6Al-4V alloy. Conclusion: The identification method developed was shown to be feasible for use in complete removable dentures, particularly when implemented using Ti-6Al-4V alloy. The findings highlight its potential clinical and forensic applications, thereby supporting the identification of edentulous individuals in disaster situations.
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Medicina dentária forense Marcação protética Resinas acrílicas Titânio Aço inoxidável Forensic dentistry Denture identification marking Acrylic resins Titanium Stainless steel
Contexto Educativo
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Sem licença CC