Effects of pigment, disinfection, and accelerated aging on the hardness and deterioration of a facial silicone elastomer

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGoiato, Marcelo Coelho
dc.creatorPesqueira, Aldieris Alves
dc.creatorMoreno, Amalia
dc.creatorSantos, Daniela Micheline dos
dc.creatorHaddad, Marcela Filie
dc.creatorBannwart, Lisiane Cristina
dc.date2013-09-30T18:30:07Z
dc.date2014-05-20T13:43:44Z
dc.date2016-10-25T16:58:15Z
dc.date2013-09-30T18:30:07Z
dc.date2014-05-20T13:43:44Z
dc.date2016-10-25T16:58:15Z
dc.date2012-09-01
dc.date.accessioned2017-04-05T20:47:50Z
dc.date.available2017-04-05T20:47:50Z
dc.identifierPolymer Degradation and Stability. Oxford: Elsevier B.V., v. 97, n. 9, p. 1577-1580, 2012.
dc.identifier0141-3910
dc.identifierhttp://hdl.handle.net/11449/15286
dc.identifierhttp://acervodigital.unesp.br/handle/11449/15286
dc.identifier10.1016/j.polymdegradstab.2012.06.033
dc.identifierWOS:000308051500003
dc.identifier0000-0002-3800-3050
dc.identifierhttp://dx.doi.org/10.1016/j.polymdegradstab.2012.06.033
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/862317
dc.descriptionThe failure of facial prostheses is caused by limitations in their flexibility and durability. Therefore, we evaluated the effects of disinfection and aging on Shore A hardness and deterioration of a facial silicone with different pigmentations. Twenty samples with addition of each pigment (ceramic (C), make-up (M)) and without pigment (L) were made. For each pigment type and no pigment, 10 samples were subjected to two types of disinfectant solution (soap (S) and Efferdent (E)), totaling sixty samples. The specimens were disinfected three times per week for 60 days, and subjected to accelerated aging for 1008 h. The hardness of the facial silicone was measured with a durometer, and its deterioration was evaluated by obtaining the weight difference over time. Both the hardness and weight of the samples were measured at baseline, after chemical disinfection, and periodically during accelerated aging (252, 504, and 1008 h). Deterioration was calculated during the periods between baseline and chemical disinfection, and between baseline and each aging period. The results were analyzed using three-way repeated measures ANOVA and the Tukey's HSD Post-hoc test (alpha = 0.05). Specifically, samples containing pigment exhibited significantly higher hardness and deterioration values than those lacking pigment (P < 0.05). In addition, period of time (disinfection and accelerated aging) statistically increased the hardness and deterioration values of the silicone (P < 0.05). It can be concluded that both pigment and time statistically affected the hardness and deterioration of the silicone elastomer. (c) 2012 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationPolymer Degradation and Stability
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDeterioration
dc.subjectPolymer
dc.subjectDisinfection
dc.subjectHardness
dc.subjectAccelerated aging
dc.titleEffects of pigment, disinfection, and accelerated aging on the hardness and deterioration of a facial silicone elastomer
dc.typeOtro


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