Resin infiltrant protects deproteinized dentin against erosive and abrasive wear
de Albuquerque Ana Theresa Queiroz, Bezerra Bruna Oliveira, de Carvalho Leal Isabelly, de Moraes Maria Denise Rodrigues, Melo Mary Anne S., Passos Vanara Florencio,
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( de Albuquerque Ana Theresa Queiroz ) - University of Fortaleza School of Dentistry Department of Dentistry
( Bezerra Bruna Oliveira ) - University of Fortaleza School of Dentistry Department of Dentistry
( de Carvalho Leal Isabelly ) - Federal University of Ceara School of Pharmacy, Dentistry and Nursing Department of Restorative Dentistry
( de Moraes Maria Denise Rodrigues ) - University of Fortaleza School of Dentistry Department of Dentistry
( Melo Mary Anne S. ) - University of Maryland School of Dentistry Department of General Dentistry
( Passos Vanara Florencio ) - Federal University of Ceara School of Pharmacy, Dentistry and Nursing Department of Restorative Dentistry
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.
키워드
Dentin; Icon infiltrant; Sodium hypochlorite; Tooth erosion; Tooth abrasion
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