HARDNESS and SURFACE ROUGHNESS of RELINE and DENTURE BASE ACRYLIC RESINS AFTER REPEATED DISINFECTION PROCEDURES

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dc.contributor.authorMachado, Ana Lucia [UNESP]
dc.contributor.authorBreeding, Larry C.
dc.contributor.authorVergani, Carlos Eduardo [UNESP]
dc.contributor.authorda Cruz Perez, Luciano Elias [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Mississippi
dc.date.accessioned2014-05-20T13:46:30Z
dc.date.available2014-05-20T13:46:30Z
dc.date.issued2009-08-01
dc.description.abstractStatement of problem. Microwave irradiation and immersion in chemical solutions have been recommended for denture disinfection. However, the effect of these procedures on the surface characteristics of denture base and reline resins has not been completely evaluated.Purpose. The purpose of this study was to evaluate the effect of microwave and chemical disinfection on the Vickers hardness (VHN) and surface roughness (Ra, mu m) of 2 hard chairside reline resins (Kooliner, DuraLiner II), and 1 heat-polymerizing denture base resin (Lucitone 550).Material and methods. Specimens (12 x 12 x 3 mm) were divided into 2 control and 4 test groups (n=8). Hardness and roughness measurements were performed after: polymerization and immersion in water (37 degrees C) for 7 days (controls), or repeated exposure to disinfection by Immersion In sodium perborate (50 degrees C/10 min) or microwave irradiation (650 W/6 min). Measurements of surface roughness (Ra, mu m) and hardness (kg/mm(2)) were analyzed using 3-way ANOVA and Tukey's Honestly Significant Difference (HSD) test (alpha=.05).Results. Microwave and chemical disinfection increased the mean (SD) hardness of Kooliner (from 4.1 to 7.5 kg/mm(2)) and DuraLiner II (from 2.6 to 5.6 kg/mm(2)), whereas Lucitone 550 (14.4 kg/mm(2)) remained unaffected. Disinfection by immersion in sodium perborate increased the surface roughness of DuraLiner II (from 0.13 to 0.26 mu m) and Kooliner (from 0.16 to 0.26 mu m), regardless of the number of cycles. For Lucitone 550, an increase in roughness was observed after 2 cycles of chemical disinfection (from 0.12 to 0.26 mu m). Two cycles of microwave disinfection increased the roughness of both reline resins (DuraLiner II: from 0.13 to 0.22 mu m; Kooliner: from 0.16 to 0.24 mu m), whereas repeated microwave disinfection increased the roughness of DuraLiner II (from 0.11 to 0.25 mu m).Conclusions. Disinfection by immersion in sodium perborate or microwave irradiation did not adversely affect the hardness of all materials evaluated. The effect of both disinfection methods on the roughness varied among materials. (J Prosthet Dent 2009;102:115-122)en
dc.description.affiliationUniv Estadual Paulista, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, São Paulo, Brazil
dc.description.affiliationUniv Mississippi, Med Ctr, Dept Care Planning & Restorat Sci, Sch Dent, Jackson, MS 39216 USA
dc.description.affiliationUnespUniv Estadual Paulista, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, São Paulo, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 520866/00-2
dc.format.extent115-122
dc.identifierhttp://dx.doi.org/10.1016/S0022-3913(09)60120-7
dc.identifier.citationJournal of Prosthetic Dentistry. New York: Mosby-elsevier, v. 102, n. 2, p. 115-122, 2009.
dc.identifier.doi10.1016/S0022-3913(09)60120-7
dc.identifier.issn0022-3913
dc.identifier.lattes8000248781842587
dc.identifier.lattes3003130522427820
dc.identifier.orcid0000-0002-7375-4714
dc.identifier.urihttp://hdl.handle.net/11449/16464
dc.identifier.wosWOS:000269159100008
dc.language.isoeng
dc.publisherMosby-elsevier
dc.relation.ispartofJournal of Prosthetic Dentistry
dc.relation.ispartofjcr2.347
dc.relation.ispartofsjr1,087
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleHARDNESS and SURFACE ROUGHNESS of RELINE and DENTURE BASE ACRYLIC RESINS AFTER REPEATED DISINFECTION PROCEDURESen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderMosby-elsevier
unesp.author.lattes8000248781842587[1]
unesp.author.lattes3003130522427820
unesp.author.orcid0000-0002-7375-4714[3]
unesp.author.orcid0000-0002-2718-428X[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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