Abstract
INTRODUCTION: Biomaterials such as bioactive glasses and glass-ceramics have been proposed for the treatment of dentinal hypersensitivity. OBJECTIVE: to evaluate by scanning electron microscopy (SEM), the dissolution of a novel bioactive glass-ceramic (Biosilicate® 1-20 µm particles) on dentin surface samples, with different application methods and different dilution medium used for applying Biosilicate®. MATERIAL AND METHOD: 280 dentin samples were randomly divided into four groups: (1) Biosilicate® plus fluoride gel applied with Robinson brush; (2) Biosilicate® plus fluoride gel applied with microbrush; (3) Biosilicate® plus distilled water applied with Robinson brush; (4) Biosilicate® plus distilled water applied with microbrush. After treatment, the samples were immersed in saliva at different periods (0, 15 and 30 minutes, 1, 2, 12 and 24 hours). Two photomicrographs were obtained from each sample and were further analyzed by a blind calibrated examiner according to a "Particle Dissolution Index" created for this study. RESULT: The data were analyzed using the Mann-Whitney, Kruskal-Wallis and Dunn's tests. There was no statistical difference among the degrees of dissolution between the 4 groups in any period. CONCLUSION: Biosilicate® can be incorporated in both substances without differences in the degree of dissolution of the particles in any of the evaluated periods and the application of dentine can be performed with both methods evaluated.
Highlights
Biomaterials such as bioactive glasses and glass-ceramics have been proposed for the treatment of dentinal hypersensitivity
Dentin Hypersensitivity (DH) is clinically defined as an acute, transient and well located pain which occurs in exposed dentin in response to tactile, thermal, evaporative, osmotic or chemical stimuli and which cannot be attributed to any other dental pathology
The results presented no statistically significant differences between the application methods when fluoride gel was used for dilution at the evaluated periods
Summary
Biomaterials such as bioactive glasses and glass-ceramics have been proposed for the treatment of dentinal hypersensitivity. DH is clinically defined as an acute, transient and well located pain which occurs in exposed dentin in response to tactile, thermal, evaporative, osmotic or chemical stimuli and which cannot be attributed to any other dental pathology. According to the hydrodynamic theory proposed by Brännström, this pain occurs as a result of sensory nerve fibers activation in the pulp which is caused by the movement of fluids within the dentinal tubules. These sensory nerve fibers are activated by a hydrodynamic stimulus applied on the dentin exposed to the oral environment[3]
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