Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Resin infiltrant protects deproteinized dentin against erosive and abrasive wear

  • Ana Theresa Queiroz de Albuquerque (Department of Dentistry, School of Dentistry, University of Fortaleza) ;
  • Bruna Oliveira Bezerra (Department of Dentistry, School of Dentistry, University of Fortaleza) ;
  • Isabelly de Carvalho Leal (Department of Restorative Dentistry, School of Pharmacy, Dentistry and Nursing, Federal University of Ceara) ;
  • Maria Denise Rodrigues de Moraes (Department of Dentistry, School of Dentistry, University of Fortaleza) ;
  • Mary Anne S. Melo (Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry) ;
  • Vanara Florencio Passos (Department of Restorative Dentistry, School of Pharmacy, Dentistry and Nursing, Federal University of Ceara)
  • Received : 2021.11.28
  • Accepted : 2022.01.20
  • Published : 2022.08.31
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Abstract

Objectives: This study aimed to investigate the anti-erosive/abrasive effect of resin infiltration of previous deproteinized dentin. Materials and Methods: Dentin slabs were randomly assigned to 3 groups (n = 15): Control (no deproteinization; no resin infiltrant applied), RI (no deproteinization; resin infiltrant applied), and DRI (deproteinization; resin infiltrant applied). After undergoing the assigned treatment, all slabs were subjected to an in vitro cycling model for 5 days. The specimens were immersed in citric acid (0.05 M, pH = 3.75; 60 seconds; 3 times/day) and brushed (150 strokes). Between the challenges, the specimens were exposed to a remineralizing solution (60 minutes). The morphological alterations were analyzed by mechanical profilometry (㎛) and scanning electron microscopy (SEM). Data were submitted to one-way analysis of variance (ANOVA) and Tukey tests (p < 0.05). Results: Control and RI groups presented mineral wear and did not significantly differ from each other (p = 0.063). DRI maintained a protective layer preserving the dentin (p < 0.001). After erosive/abrasive cycles, it was observed that in group RI, only 25% of the slabs partially evidenced the presence of the infiltrating, while, in the DRI group, 80% of the slabs presented the treated surface entirely covered by a resin-component layer protecting the dentin surface as observed in SEM images. Conclusions: The removal of the organic content allows the resin infiltrant to efficiently protect the dentin surface against erosive/abrasive lesions.

Keywords

Acknowledgement

The authors would like to thank the Central Analitica-UFC/CT-INFRA/MCTI-SISANO/Pro-Equipamentos CAPES for the support.

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