Document Detail

Effect of thermal cycling and disinfection on colour stability of denture base acrylic resin.
MedLine Citation:
PMID:  22519836     Owner:  NLM     Status:  Publisher    
doi: 10.1111/j.1741-2358.2012.00676.x Effect of thermal cycling and disinfection on colour stability of denture base acrylic resin 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 60 days. All specimens were thermal cycled between 5 and 55°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 (ΔE) were calculated between T(1) and B (T(1) B), D and B (DB), and T(2) and B (T(2) B) 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.
Marcelo C Goiato; Daniela M Dos Santos; Gabriella T Baptista; Amália Moreno; Agda M Andreotti; Lisiane C Bannwart; Stefan F C Dekon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-23
Journal Detail:
Title:  Gerodontology     Volume:  -     ISSN:  1741-2358     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8215850     Medline TA:  Gerodontology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Gerodontology Society and John Wiley & Sons A/S.
Department of Dental Materials and Prosthodontics, Faculty of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil.
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