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
em En
| LILACS, BBO
| ID: biblio-1094949
Biblioteca responsável:
BR218.1
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 challengesPalavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
BBO
/
LILACS
Assunto principal:
Erosão Dentária
/
Resinas Compostas
/
Ácido Gástrico
Idioma:
En
Revista:
Braz. j. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Brasil
/
Reino Unido
País de publicação:
Brasil