Effect of an additional hydrophobic resin application in self-etch adhesives on the clinical performance of class V composite restorations

The aim of this study was to evaluate the 18-month clinical performances of two different one-step dentin adhesives that applied alone or with an additional hydrophobic resin layer to non-carious cervical lesions, according to FDI criteria. 160 teeth in 31 patients included in the study were divided into 4 groups. Clearfil S3 Bond Plus in Group 1, Clearfil S3 Bond Plus and Heliobond in Group 2, G-Premio Bond in Group 3, G-Premio Bond and Heliobond applied teeth in Group 4 and they were restored with Clearfil Majesty ES-2 by single operator. Restorations were evaluated after 1 week, 6, 12 and 18 months of clinical use. The difference between the study groups was compared with Kruskal Wallis One-way analysis of variance and Dunn's multiple comparison test for variables that do not have a normal distribution. Differences between times / measurements / groups were evaluated using Friedman ANOVA and Tukey Post Hoc Test in continuous variables without normal distribution (p<0,05). After initial, 6, 12 and 18 months of clinical use, there was no significant difference between the groups in terms of the surface lustre, marginal staining, color match and translucency, esthetic anatomic form, fracture of material and retention, marginal adaptation, post-operative sensitivity, seconder caries and periodontal response parameters (p>0,05). It was found that the difference in content between the adhesives and the application of additional hydrophobic resin had no significant effect on clinical performance. Key Words: Clinical trial, Tooth abrasion, Adhesion, Composite dental resin, FDI criteria. The present work was supported by the Research Fund of Istanbul University. Project No. 31778