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Effect of ultraviolet protective agents on maxillofacial silicone elastomer, part 2: Mechanical properties after artificial aging

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dc.contributor.author Gungor, Merve Bankog
dc.contributor.author Nemli, Secil Karakoca
dc.contributor.author Bal, Bilge Turhan
dc.contributor.author Arci, Yeliz Kas
dc.date.accessioned 2024-03-19T06:52:53Z
dc.date.available 2024-03-19T06:52:53Z
dc.date.issued 2023
dc.identifier.citation Güngör, MB., Nemli, SK., Bal, BT., Arci, YK. (2023). Effect of ultraviolet protective agents on maxillofacial silicone elastomer, part 2: Mechanical properties after artificial aging. J. Prosthet. Dent., 129(4), 658-668. https://doi.org/10.1016/j.prosdent.2021.06.032 en_US
dc.identifier.issn 0022-3913
dc.identifier.issn 1097-6841
dc.identifier.uri http://dx.doi.org/10.1016/j.prosdent.2021.06.032
dc.identifier.uri https://www.webofscience.com/wos/woscc/full-record/WOS:000982158900001
dc.identifier.uri http://earsiv.odu.edu.tr:8080/xmlui/handle/11489/4743
dc.description WoS Categories: Dentistry, Oral Surgery & Medicine en_US
dc.description Web of Science Index: Science Citation Index Expanded (SCI-EXPANDED) en_US
dc.description Research Areas: Dentistry, Oral Surgery & Medicine en_US
dc.description.abstract Statement of problem. The addition of ultraviolet (UV) protectives may affect the materials' mechanical properties, which can limit the service life of facial prostheses. Purpose. The purpose of this in vitro study was to investigate the effect of UV protectives on the mechanical properties of maxillofacial silicones after artificial aging. Material and methods. Six color groups (unpigmented, white, yellow, red, blue, and mixed) of addition-type maxillofacial silicone were prepared. Four UV protectives, benzophenone-3 (UV-BP), ethylhexyl methoxycinnamate (UV-EM), titanium dioxide (UV-TD), and ethylhexyl salicylate (UV-ES), at 0.5% and 1% concentrations by weight were incorporated into the silicone before polymerization. The specimens were subjected to accelerated aging in a weathering chamber for 300 and 600 hours and to thermocycling. The tensile strength and percentage elongation, tear strength, and hardness of maxillofacial silicones were evaluated. Data were analyzed by using 4way ANOVA. The differences were compared by the Tukey honestly significant difference test (a=.05). Results. Tensile strength decreased after 300 and 600 hours of UV aging in 0.5% and 1% UV-BP protective-added groups and increased in thermocycled groups (P<.05). Aging conditions generally showed no effect on the tensile strength of UV-EM, UV-TD, and UV-ES added groups (P>.05). Aging generated a decrease in percentage elongation values compared with nonaged specimens of groups (P<.05). The addition of UV protectives generally did not significantly affect the tear strength of specimens compared with control in the aged groups (P>.05). The hardness of UV protective-added groups increased when compared with that of nonaged groups after 300 and 600 hours of UV aging (P<.05). Also, thermally aged groups showed increased hardness Conclusions. The protective UV-BP addition caused decreased tensile strength, percentage elongation, and tear strength in both concentrations. The UV-EM and UV-ES provided increases in tensile strength and percentage elongation of the silicone in the 0.5% concentration. The addition of UV-BP, UV-EM, and UV-ES did not make significant differences; however, UV-TD significantly decreased the hardness values of the silicone. (J Prosthet Dent 2023;129:658-68) en_US
dc.description.sponsorship Scientific and Technological Research Council of Turkey (TUBITAK) [215M738] en_US
dc.language.iso eng en_US
dc.publisher MOSBY-ELSEVIER-NEW YORK en_US
dc.relation.isversionof 10.1016/j.prosdent.2021.06.032 en_US
dc.rights info:eu-repo/semantics/openAccess en_US
dc.subject UV ABSORBERS, OPACIFIERS en_US
dc.title Effect of ultraviolet protective agents on maxillofacial silicone elastomer, part 2: Mechanical properties after artificial aging en_US
dc.type article en_US
dc.relation.journal JOURNAL OF PROSTHETIC DENTISTRY en_US
dc.contributor.department Ordu Üniversitesi en_US
dc.identifier.volume 129 en_US
dc.identifier.issue 4 en_US
dc.identifier.startpage 658 en_US
dc.identifier.endpage 668 en_US


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