Influência de protocolos de fotoativação através de braquetes cerâmicos nas propriedades físicas de resinas ortodônticas

• Autor(a) principal: Teixeira, Fernanda Durski
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório do Centro Universitário Braz Cubas
• Texto Completo: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2057
• topic: Ortodontia; Resina ortodôntica; Braquetes cerâmicos; Valo ortho; Espectroscopia infravermelho por transformada de Fourier; Dureza Vickers; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

The objective of this study was to evaluate in vitro the influence of different protocolsofphotoactivation on the degree of conversion and Vickers hardness of two orthodontic resins (Transbond XT and Transbond Plus Color Change) photoactivated by a 3ºgeneration LED (Valo Ortho Cordless). The analysis of the degree of conversion was performed by the Fourier Transform Infrared Spectroscopy (FTIR) method in twelve groups (n = 10) and the Vickers surface hardness was also evaluated in twelve groups (n = 10), all groups divided according to the resins, interposition of brackets, powers and times used. The values obtained were analyzed by ANOVA-3, followed by Tukey with significance of 5%. The resin Transbond Color Change presented a higher degree of conversion and hardness in purchase with Transbond XT. As factor for the interposition bracket, the hardness and conversion degree were higher in the group with bracket monocrystalline and photoactivated with the P2-Xtra Power protocol (3,200 mW / cm2for 2x3s). It can be concluded that the polymerization with variation of power and time, interferes in the degree of conversion and hardness of the two resins orthodontic studied. The time can be decreased and the power increased without negative effect on the properties physical.