Influence of bioactive materials used on the dentin surface whitened with carbamide peroxide 16%

Helena Burlamaqui Pinheiro,Eliza Burlamaqui Klautau,Paulo Eduardo Capel Cardoso,Bruno Lopes,Jomara Cardoso,Bruna Rozzetti Silva

doi:10.1590/s1516-14392010000200024

Helena Burlamaqui Pinheiro, Eliza Burlamaqui Klautau + Show 4 more

Open Access

https://doi.org/10.1590/s1516-14392010000200024

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Abstract

This study investigated the influence of bioactive materials on the dentin surface whitened. MATERIAL AND METHODS: Three bovine teeth were shaped into three dentin wafers. Each wafer was then sectioned, into six dentin slices. One slice from each tooth was distributed into one of 6 groups: 1.CG = control group (distilled water); 2.WT = whitening treatment; 3.WT + MI Paste Plus, applied once a day; 4.WT + Relief ACP30, applied once a day for 30 mintes; 5.WT + Relief ACP60, applied once a day for 60 minutes; 6.WT + Biosilicate®, applied once a week. All groups were treated over 14 days. RESULTS: CG presented all dentinal tubules occluded by smear layer; WT group was observed all dentinal tubules opened. In the groups 3, 4 and 6, tubules were occluded. Group 5, dentinal tubules were completely occluded by mineral deposits. CONCLUSION: The use of bioactive materials immediately after whitening treatment can reduce or even avoid the demineralization effect of whitening and avoid exposing dentinal tubules.

Highlights

Dentin hypersensitivity is considered to be partly due to the presence of dentinal tubules at the exposed dentin surface where the tubules are wider and more numerous than in nonsensitive areas[1]
The concern over the sensitivity brought by the whitening treatments has led the dental industry to develop whitening gels enhanced with desensitizers such as potassium nitrate and fluorides[7,8]
A slice was obtained for each of the treatment groups. This methodology allowed for standardization in relation to quantity, size and orientation of the dentinal tubules, facilitating the posterior morphologic comparison of the groups

Summary

Introduction

Dentin hypersensitivity is considered to be partly due to the presence of dentinal tubules at the exposed dentin surface where the tubules are wider and more numerous than in nonsensitive areas[1]. The hydrodynamic theory assumes that a stimulus applied on the dentin surface causes movement of tubular fluid, which activates mechanoreceptor nerves, eliciting pain[2] According to this theory, if the functional radius of opened dentinal tubules decreases, the permeability is decreased, reducing dentin sensitivity[3]. The concern over the sensitivity brought by the whitening treatments has led the dental industry to develop whitening gels enhanced with desensitizers such as potassium nitrate and fluorides[7,8]. These substances do not solve the issue completely, and do not reduce the demineralization process[6]

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