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KMID : 1034420220470030029
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Restorative Dentistry & Endodontics
2022 Volume.47 No. 3 p.29 ~ p.29
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Resin infiltrant protects deproteinized dentin against erosive and abrasive wear
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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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Abstract
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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.
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KEYWORD
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Dentin, Icon infiltrant, Sodium hypochlorite, Tooth erosion, Tooth abrasion
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