Effect of repeated cycles of chemical disinfection... - BV FAPESP
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Effect of repeated cycles of chemical disinfection on the roughness and hardness of hard reline acrylic resins

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Autor(es):
Pinto, Luciana de Rezende [1] ; Rodriguez Acosta, Emilio Jose T. [1] ; Fernandes Tavora, Flora Freitas [1] ; Batista da Silva, Paulo Mauricio [1] ; Porto, Vinicius Carvalho [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont, Bauru, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: GERODONTOLOGY; v. 27, n. 2, p. 147-153, JUN 2010.
Citações Web of Science: 25
Resumo

Objective: The aim of this study was to assess the effect of repeated cycles of five chemical disinfectant solutions on the roughness and hardness of three hard chairside reliners. Methods: A total of 180 circular specimens (30 mm x 6 mm) were fabricated using three hard chairside reliners (Jet; n = 60, Kooliner; n = 60, Tokuyama Rebase II Fast; n = 60), which were immersed in deionised water (control), and five disinfectant solutions (1%, 2%, 5.25% sodium hypochlorite; 2% glutaraldehyde; 4% chlorhexidine gluconate). They were tested for Knoop hardness (KHN) and surface roughness (mu m), before and after 30 simulated disinfecting cycles. Data was analysed by the factorial scheme (6 x 2), two-way analysis of variance (anova), followed by Tukey's test. Results: For Jet (from 18.74 to 13.86 KHN), Kooliner (from 14.09 to 8.72 KHN), Tokuyama (from 12.57 to 8.28 KHN) a significant decrease in hardness was observed irrespective of the solution used on all materials. For Jet (from 0.09 to 0.11 mu m) there was a statistically significant increase in roughness. Kooliner (from 0.36 to 0.26 mu m) presented a statistically significant decrease in roughness and Tokuyama (from 0.15 to 0.11 mu m) presented no statistically significant difference after 30 days. Conclusions: This study showed that all disinfectant solutions promoted a statistically significant decrease in hardness, whereas with roughness, the materials tested showed a statistically significant increase, except for Tokuyama. Although statistically significant values were registered, these results could not be considered clinically significant. (AU)

Processo FAPESP: 04/15528-1 - Avaliacao transversal e longitudinal das alteracoes de rugosidade e dureza sobre diferentes bases de proteses totais apos desinfeccao em microondas e em solucoes desinfetantes.
Beneficiário:Vinicíus Carvalho Porto
Modalidade de apoio: Auxílio à Pesquisa - Regular