Tooth-composite bond failure with a universal and an etch-and-rinse adhesive depending on mode and frequency of application.
Dent Mater
; 40(2): 359-369, 2024 Feb.
Article
em En
| MEDLINE
| ID: mdl-38143188
ABSTRACT
OBJECTIVES:
To evaluate the effect of an additional layer of universal adhesive on the interfacial enamel/dentin-composite gap formation in relation to application mode and aging, via spectral domain optical coherence tomography (SD-OCT) and scanning electron microscopy (SEM).METHODS:
In vitro class V cavities in 114 caries-free premolars were restored by applying one or two layers of a universal adhesive (Scotchbond Universal, SBU) in self-etch (se) and etch-and-rinse (er) mode or the reference adhesive OptiBond FL (OFL-er). The restorations were imaged by SD-OCT (six groups, n = 8) and SEM (n = 3) directly after filling (t1), water storage (t2, 24 h), embedding (t3), and thermo-mechanical loading (t4, TCML). The interfacial gaps were quantified using 26 parameters and analyzed using principal component analysis and linear mixed effect models.RESULTS:
Gap formation at enamel and dentin was significantly influenced by the adhesive, the application mode and number of layers (p < 0.001). This was due to the influence of the SBU-er mode (p < 1e-05), which showed significantly more gap formation and a greater range of variation with double application when compared to SBU-se and OFL. The fewest interfacial gaps occurred with one or two applications of OFL-er and one layer of SBU-er.SIGNIFICANCE:
Adhesive application mode and the number of adhesive layers are relevant factors in the tooth-composite bond failure. Double application worsened the adaptation of SBU to freshly prepared dentin conditioned with phosphoric acid.Palavras-chave
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Bases de dados:
MEDLINE
Assunto principal:
Colagem Dentária
/
Cimentos Dentários
Idioma:
En
Revista:
Dent Mater
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article