Effect of saliva contamination on bond strength with a hydrophilic composite resin

Mauren Bitencourt Deprá, Josiane Xavier de Almeida, Taís de Morais Alves da Cunha, Luis Filipe Siu Lon, Luciana Borges Retamoso, Orlando Motohiro Tanaka

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.

Sunday, December 17, 2017 07:56