The surface treatment and the material influenced adhesive resistance of brackets bonded to temporary crowns. Roughening by aluminum blasting increased bond strength when compared to Soflex, in the group bonded with Duralay. The bond strength of Duralay acrylic resin was superior to that of Transbond XT composite resin.
How to cite this article: Deprá MB, Almeida JX, Cunha TMA, Lon LFS, Retamoso LB, Tanaka OM. Effect of saliva contamination on bond strength with a hydrophilic composite resin. Dental Press J Orthod. 2013 Jan-Feb;18(1):63-8. » The author reports no commercial, proprietary or financial interest in the products or companies described in this article. Objective: To evaluate the influence of saliva contamination on the bond strength of metallic brackets bonded to enamel with hydrophilic resin composite. Methods: Eighty premolars were randomly divided into 4 groups (n = 20) according to bonding material and contamination: G1) bonded with Transbond XT with no saliva contamination, G2) bonded with Transbond XT with saliva contamination, G3) bonded with Transbond Plus Color Change with no saliva contamination and G4) bonded with Transbond Plus Color Change with saliva contamination. The results were statistically analyzed (ANOVA/Tukey). Results: The means and standard deviations (MPa) were: G1)10.15 ± 3.75; G2) 6.8 ± 2.54; G3) 9.3 ± 3.36; G4) 8.3 ± 2.95. The adhesive remnant index (ARI) ranged between 0 and 1 in G1 and G4. In G2 there was a prevalence of score 0 and similar ARI distribution in G3. Conclusion: Saliva contamination reduced bond strength when Transbond XT hydrophobic resin composite was used. However, the hydrophilic resin Transbond Plus Color Change was not affected by the contamination. Keywords: Saliva. Orthodontic brackets. Bond strength. Adhesives.Objetivo: avaliar a influência da contaminação por saliva na resistência de união de braquetes metálicos colados ao esmalte com um compósito resinoso hidrofílico. Métodos: oitenta pré-molares foram divididos aleatoriamente em quatro grupos (n=20), de acordo com o material de colagem e a presença de contaminação -G1) colagem com Transbond XT na ausên-cia de contaminação; G2) colagem com Transbond XT na presença de contaminação; G3) colagem com Transbond Plus Color Change na ausência de contaminação; G4) colagem com Transbond Plus Color Change na presença de contaminação. Os resultados foram tratados estatisticamente (ANOVA/Tukey). Resultados: as médias e desvios-padrão (MPa) foram G1 = 10,15 ± 3,75; G2 = 6,8 ± 2,54; G3 = 9,3 ± 3,36; G4 = 8,3 ± 2,95. O índice de adesivo remanescente (IAR) variou entre 0 e 1 no G1 e no G4; no G2, houve predomínio do escore 0 e distribuição similar no G3. Conclusão: a contaminação por saliva reduziu a resistência de união no grupo que usou a resina hidrofóbica Transbond XT. Por outro lado, a resina hidrofí-lica Transbond Plus Color Change não foi influenciada pela contaminação. Palavras-chave: Saliva. Braquetes ortodônticos. Resistência ao cisalhamento. Adesivos.
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