Influence of aging on bond strength of artificial teeth to denture base acrylic resins

  • Etiene Faria Aguiar
  • Rafaella Tonani
  • Fabiana de Goes Paiola
  • Michelle Alexandra Chinelatti
  • Carolina Noronha Ferraz de Arruda
  • Julio César Souza da Matta
  • Fernanda de Carvalho Panzeri Pires-de-Souza

Abstract




Aim: The aim of this study was to evaluate the bond strengthof artificial teeth to different types of denture base resins whensubmitted to thermomechanical cycling (TMC). Methods: Sixtyartificial mandibular first molars (Trilux, Vipi) were randomlydivided into 3 groups according to denture base acrylic resins(Vipi Wave, Vipi Cril, and Vipi Cril Plus, Vipi). The teeth were fixedonto self-polymerizing acrylic resin bars (0.5 cm2 cross-sectionx 2 cm height), and the set was included in a metal flask usingdental stone/silicone. After the dental stone was set, the bar wasremoved, and the denture base resin was packed and processed according to the group studied (Vipi Wave: 180 W/20 minutes + 540W/5 minutes; Vipi Cril and Vipi Cril Plus: Water bath at 74oC for9h). After polymerization, the samples were divided into 2 groups (n=10), according to the TMC treatment received (simulation of 5 years of mastication or not). The samples were submitted to tensile bond strength test (1 mm/min), and the data (MPa) werestatistically analyzed (2-way ANOVA, Bonferroni, α=0.05). Thefracture interfaces were evaluated using a stereomicroscope (50x). Results: The bond strength results showed no statisticallysignificant difference (p>0.05) between the resins studied. TMC was significant (p<0.05), demonstrating lower values for the bond strength of artificial teeth to Vipi Cril Plus. The predominantfracture type was cohesive in resin. Conclusions: It was concluded that there is no difference in bond strength betweenartificial teeth and the resins used for denture base. However, TMC decreases the bond strength values of artificial teeth and crosslink thermo-polymerizable acrylic resin.




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Published
2018-08-18
How to Cite
AGUIAR, Etiene Faria et al. Influence of aging on bond strength of artificial teeth to denture base acrylic resins. Brazilian Journal of Oral Sciences, [S.l.], p. e18373, aug. 2018. ISSN 1677-3225. Available at: <https://www.fop.unicamp.br/bjos/index.php/bjos/article/view/1391>. Date accessed: 20 july 2019. doi: https://doi.org/10.20396/bjos.v17i0.8652929.
Section
Original Research

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