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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 7
Affiliation:
[1] UNESP Univ Estadual Paulista, Dept Dent Mat & Prosthodont, Fac Dent Aracatuba, BR-16015050 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: GERODONTOLOGY; v. 30, n. 4, p. 276-282, DEC 2013.
Web of Science Citations: 6
Abstract

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)

FAPESP's process: 09/16971-0 - Thermal cycling effect and disinfection on the microhardness stability of color of acrylic resins for denture base
Grantee:Gabriella Trunckle Baptista
Support Opportunities: Scholarships in Brazil - Scientific Initiation