Marginal adaptation in proximal cavities restored with composites and other materials

Authors

  • Raphaela Farias Rodrigues Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – Bauru – SP – Brazil. Tiradentes University Center – AL – Brazil. Health Science University of Alagoas – AL – Brazil.
  • Suellen Scarcelli Senna Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – Bauru – SP – Brazil.
  • Ana Flávia Soares Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – Bauru – SP – Brazil.
  • Rafael Lia Mondelli Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – Bauru – SP – Brazil.
  • Paulo Silveira Francisconi Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – Bauru – SP – Brazil.
  • Ana Flávia Sanches Borges Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – Bauru – SP – Brazil.

DOI:

https://doi.org/10.14295/bds.2017.v20i4.1441

Abstract

Objective: To evaluate the marginal adaptation, in enamel (E) and dentin (D), of composite resin (CR) associated with flowable resin composite (flow), bulk fill flowable base (bulk) and resin modified glass ionomer cement (RMGIC) in slot cavities. Material and Methods: The study was conducted after approval (Protocol No. 21148413.4.0000.5417) from Ethics Committee. Forty extracted human molar teeth were randomly assigned in eight experimental groups: E-CR, E-BULK, E-FLOW, E-RMGIC, D-CR, D-BULK, D-FLOW, D-RMGIC. The occlusal surface was planned, two slot cavities with standard sizes (depth: 2.0 mm, height: 2.5 mm, width: 2.0 mm) were created on a machine for making cavities. The teeth were restored and after 24h subjected to 2000 cyclic loading and sectioned for analysis of marginal adaptation by scanning electron microscopy (SEM). The micrographs were analyzed with the Image J program to measure the size of marginal gaps. The data were transformed into percentages (%GAPS = LG ÷ LM  × 100) and analyzed by 2-way ANOVA followed by the post hoc Tukey test (?=0.05). Results: There was a significant difference between different treatments (p<0.01). The groups E-RMGIC (p=0.001) and D-RMGIC (p=0) had the highest percentage of marginal gap. Others groups showed similar percentage of marginal gap (p>0.05). Conclusions: It was concluded that restorations with flowable composite resin and bulk fill liners exhibit the same behavior, but the RMGIC liner increased marginal gap.

Keywords: Composite resins; Dental marginal adaptation; Glass ionomer cements.

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Published

2017-12-15

Issue

Vol. 20 No. 4 (2017): Oct. - Dec. / 2017 - Published December 2017

Section

Clinical or Laboratorial Research