Ultrastructural changes in the cemento-enamel junction after vital tooth bleaching with fluoride and fluoride-free agents - a pilot study.

Content Provider	Europe PMC
Author	Gasic, Jovanka Kesic, Ljiljana Popovic, Jelena Mitić, Aleksandar Nikolic, Marija Stankovic, Sasa Barac, Radomir
Copyright Year	2012
Abstract	SummaryBackgroundThe impact of bleaching on the cemento-enamel junction (CEJ) is not well known. Due to frequent sensitivity of the cervical region of teeth after the vital bleaching, the aim of the present study was to evaluate the morphological features of the CEJ of human teeth after application of fluoridated and fluoride-free bleaching agents, as well as post-bleaching fluoridation treatment, by scanning electron microscopy (SEM) analysis.Material/MethodsThirty-five extracted permanent human teeth were longitudinally cut, yielding 70 specimens. Thirty specimens were randomly divided into the 3 experimental groups, and 20 specimens, were used as (2) control groups, each: negative (untreated) control group; positive control group treated with 35% hydrogen peroxide; experimental group 1, bleaching with 10% carbamide peroxide (CP); experimental group 2, treatment with a mixture of 10% CP and fluoride; and experimental group 3, treatment with 10% CP and 2% sodium fluoride gel applied 30 minutes after bleaching. Experimental groups were treated 8 h per day for 14 days. The samples were examined by SEM.ResultsThe bleaching materials tested caused morphological changes to the surface of the CEJ. There was a statistically significant difference between experimental groups (Kruskal Wallis Test chi-square=11,668; p<0.005). Mean value of experimental group 2 scores showed statistically significant difference from groups 1 and 3.ConclusionsBleaching gel with fluorides does not significantly change morphological appearance of the CEJ and represents a better choice than the hard tissue fluoridation process after bleaching.
ISSN	12341010
Journal	Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
Volume Number	18
PubMed Central reference number	PMC3560748
Issue Number	3
PubMed reference number	22367139
e-ISSN	16433750
DOI	10.12659/msm.882502
Language	English
Publisher	International Scientific Literature, Inc.
Publisher Date	2012-03-01
Access Restriction	Open
Rights License	This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. © Med Sci Monit, 2012
Subject Keyword	cemento-enamel junction bleaching carbamide peroxide fluoride scanning electron microscopy
Content Type	Text
Resource Type	Article
Subject	Medicine