Resin infiltrant protects deproteinized dentin against erosive and abrasive wear

Ana Theresa Queiroz de Albuquerque; Bruna Oliveira Bezerra; Isabelly de Carvalho Leal; Maria Denise Rodrigues de Moraes; Mary Anne S Melo; Vanara Florêncio Passos

doi:10.5395/rde.2022.47.e29

Resin infiltrant protects deproteinized dentin against erosive and abrasive wear

Restor Dent Endod. 2022 Jul 1;47(3):e29. doi: 10.5395/rde.2022.47.e29. eCollection 2022 Aug.

Authors

Ana Theresa Queiroz de Albuquerque¹, Bruna Oliveira Bezerra¹, Isabelly de Carvalho Leal², Maria Denise Rodrigues de Moraes¹, Mary Anne S Melo^{3

4}, Vanara Florêncio Passos²

Affiliations

¹ Department of Dentistry, School of Dentistry, University of Fortaleza, Fortaleza, CE, Brazil.
² Department of Restorative Dentistry, School of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, CE, Brazil.
³ Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, MD, USA.
⁴ Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD, USA.

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 (µm) 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: Dentin; Icon infiltrant; Sodium hypochlorite; Tooth abrasion; Tooth erosion.