Can surface protection prevent damage in margins of composite resin restorations after simulated endogenous erosion?
Braz. j. oral sci
;
18: e191462, jan.-dez. 2019. ilus
Article
in English
| LILACS, BBO
| ID: biblio-1094949
ABSTRACT
Aim:
The study investigated the effect of using surface protection agents in the adaptation of external and internal margins of restorations subjected to simulated erosion.Methods:
Cavities with margins in dentin were prepared in bovine incisors (n=120). Adhesive restorations were placed using a three-step etch&rinse adhesive system and nanofilled composite resin. The specimens were divided into four groups, according to the surface protection negative control, topical application of fluoride (TAF), resin sealant and resin-modified glass ionomer varnish (RMGI varnish). Afterwards, they were divided into three sub-groups, according to the exposure to a simulated solution of gastric acid (DES) (5% HCl, pH=2,2) and subsequent remineralization (RE) negative control, 9 and 18 cycles of DES-RE. The evaluation of the tooth-restoration interface was performed on the internal and frontal images with the aid of a stereoscopic microscope (15x), and the percentage of continuous margins without adhesive failures was quantified.Results:
In the external margins, only those groups with surface protection using sealants (resin and glass-ionomer) did not exhibit a significant decrease in the percentage of continuous margins after the erosive challenges. After 18 cycles of DES-RE, the use of resin-modified glass ionomer varnish resulted in the highest percentage of continuous margins.Conclusion:
It was concluded that physically covering the surfaces with a sealing agent preserved the marginal adaptation of composite resin restorations exposed to endogenous erosive challenges
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth Erosion
/
Composite Resins
/
Gastric Acid
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2019
Type:
Article
Affiliation country:
Brazil
/
United kingdom
Institution/Affiliation country:
Federal University of Bahia (UFBA)/BR
/
King's College London/BR
/
School of Medicine and Public Health of Bahia (BAHIANA)/BR
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