Torres, Carlos Rocha Gomes [UNESP]Mailart, Mariane Cintra [UNESP]Rocha, Rafael Santos [UNESP]Sellan, Pablo Lenin Benitez [UNESP]Contreras, Sheila Célia Mondragón [UNESP]Di Nicoló, Rebeca [UNESP]Borges, Alessandra Bühler [UNESP]2021-06-252021-06-252020-11-01Journal of Dentistry, v. 102.0300-5712http://hdl.handle.net/11449/206576Objective: The aim of this study was to evaluate the influence of a liner on the clinical performance of deep posterior restorations performed with bulk-fill composite. Methods: 30 subjects received two restorations on deep preparations in posterior teeth, without pulpal exposure, after selective carious-tissue removal in one-stage. The internal walls reached the inner quarter of dentin, but with a radiographically detectable zone of firm dentin remaining. The pulpal protection using a layer of glass ionomer composite liner (Ionoseal, Voco) was applied in just one preparation. The adhesive system Futurabond U (Voco) was applied in all preparations, which were restored with the bulk-fill pure Ormocer nanohybrid composite (Admira Fusion Xtra - Voco), in up to 4 mm thick increments. All restorations were evaluated using the FDI criteria after 7 days, 6, 12 and 24 months postoperatively. Results: After 24-months, 25 patients attended the recall and 50 restorations were evaluated. The Fisher's statistical analysis (5%) showed no difference between the techniques for the esthetic, functional and biological properties. No postoperative sensitivity was reported for both groups. Conclusion: The application of a liner did not influence the clinical performance of deep restorations with bulk-fill Ormocer composite. Clinical relevance: The application of a liner with a GIC-based material did not have a significant effect on the clinical performance of bulk-fill restorations and seems to be unnecessary for the material tested.engBulk-fillGlass ionomer cementLinerOrmocerPulp ProtectionArtigo10.1016/j.jdent.2020.1034542-s2.0-85091679996