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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Effect of thermal cycling and disinfection on colour stability of denture base acrylic resin

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Autor(es):
Goiato, Marcelo C. [1] ; dos Santos, Daniela M. [1] ; Baptista, Gabriella T. [1] ; Moreno, Amalia [1] ; Andreotti, Agda M. [1] ; Bannwart, Lisiane C. [1] ; Dekon, Stefan F. C. [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] UNESP Univ Estadual Paulista, Dept Dent Mat & Prosthodont, Fac Dent Aracatuba, BR-16015050 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: GERODONTOLOGY; v. 30, n. 4, p. 276-282, DEC 2013.
Citações Web of Science: 6
Resumo

Objectives: The purpose of this study was to investigate the effect of thermal cycling and disinfection on the colour change of denture base acrylic resin. Materials and Methods: Four different brands of acrylic resins were evaluated (Onda Cryl, QC 20, Classico and Lucitone). All brands were divided into four groups (n=7) determined according to the disinfection procedure (microwave, Efferdent, 4% chlorhexidine or 1% hypochlorite). The treatments were conducted three times a week for 60days. All specimens were thermal cycled between 5 and 55 degrees C with 30-s dwell times for 1000 cycles before and after disinfection. The specimens' colour was measured with a spectrophotometer using the CIE L{*}a{*}b{*} system. The evaluations were conducted at baseline (B), after first thermal cycling (T-1), after disinfection (D) and after second thermal cycling (T-2). Colour differences (E) were calculated between T-1 and B (T1B), D and B (DB), and T-2 and B (T2B) time-points. Results: The samples submitted to disinfection by microwave and Efferdent exhibited the highest values of colour change. There were significant differences on colour change between the time-points, except for the Lucitone acrylic resin. Conclusions: The thermal cycling and disinfection procedures significantly affected the colour stability of the samples. However, all values obtained for the acrylic resins are within acceptable clinical parameters. (AU)

Processo FAPESP: 09/16971-0 - Efeito da termociclagem e desinfecção sobre a microdureza e estabilidade de cor de resinas acrílicas para base de prótese total
Beneficiário:Gabriella Trunckle Baptista
Modalidade de apoio: Bolsas no Brasil - Iniciação Científica