Identificação em desdentados

: utilização de QR code em próteses removíveis

Abstract

Introduction: Tooth structure analysis is an essential tool for the human identification process and, for this reason, identification in completely edentulous individuals becomes complex. Because the prosthesis can be the only element that allows the identification of completely edentulous individuals, the marking of dental prostheses with Quick Response (QR) Codes that encode identifying information is a solution to simplify the establishment of identity.
Material and Methods: Materials were selected to test the viability of the plate obtaining process, with an evaluation of the most advantageous process between milling and laser cutting. After the manufacture of different size plates and QR Code laser engraving, their readability and resistance to high temperatures (600°C and 1000°C) for a period of 30 minutes and to the action of corrosive substances (sulfuric acid and sodium hydroxide) were evaluated.
Results: The smallest readable size was 7.5mm x 7.5mm. The exposure of titanium and stainless steel to high temperatures revealed the problem of oxidation of these materials after prolonged exposure to high temperatures. Titanium showed high resistance to sulfuric acid corrosion and moderate resistance to sodium hydroxide corrosion. Stainless steel showed very low resistance to sulfuric acid corrosion and high resistance to sodium hydroxide corrosion. Conclusion: Even though it was not possible to reduce the size of the readable QR Code, this study developed a fast, efficient and accessible method of manufacturing plates for QR Code engraving and tested its resistance to two physical-chemical procedures. More studies are needed so that this identification method can be widely applied in the future.

Date of Award	25 Jul 2023
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Cristina Figueiredo (Supervisor) & Filipe Miguel Araújo (Co-Supervisor)