Hydrofluoric acid on dentin should be avoided.
Dent Mater
; 26(7): 643-9, 2010 Jul.
Article
en En
| MEDLINE
| ID: mdl-20359738
ABSTRACT
UNLABELLED Hydrofluoric acid can be used for intra-oral repair of restorations. Contamination of tooth substrate with hydrofluoric acid cannot always be avoided. OBJECTIVES:
To investigate the bonding effectiveness to hydrofluoric acid contaminated dentin by, micro-tensile bond strength testing, SEM and TEM.METHODS:
For this study, 15 molar teeth were used of which dentin surfaces were subjected to five, different etching procedures. Group A, 37.5% phosphoric acid (Kerr Gel) (control group); group B, 37.5% phosphoric acid followed by 3% hydrofluoric acid (DenMat); group C, 37.5% phosphoric acid, followed by 9.6% hydrofluoric acid (Pulpdent); group D, 3% hydrofluoric acid followed by 37.5%, phosphoric acid; group E, 9.6% hydrofluoric acid followed by 37.5% phosphoric acid. After the bonding procedure (OptiBond FL, Kerr) a composite resin build-up (Clearfil AP-X, Kuraray), was made. After 1 week storage, specimens were prepared for micro-tensile bond testing, SEM- and, TEM-analysis. Data were analyzed using ANOVA and post hoc Tukey's HSD (p<0.05).RESULTS:
In the control group (solely phosphoric acid), the mean microTBS was 53.4+/-10.6 MPa, which was, significantly higher than any hydrofluoric acid prepared group (group A versus groups B-E, p<0.001). No, significant differences in microTBS were found between the 3% and 9.6% hydrofluoric acid groups group B versus group C (13.5+/-5.5 MPa and 18.7+/-4.3 MPa, respectively) or group D versus group E (19.9+/-6.8 MPa and 20.3+/-4.1 MPa, respectively).SIGNIFICANCE:
Due to its adverse effect on the bond strength of composite to dentin, contact of hydrofluoric acid to dentin should be avoided.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Grabado Ácido Dental
/
Recubrimiento Dental Adhesivo
/
Dentina
/
Ácido Fluorhídrico
Límite:
Humans
Idioma:
En
Revista:
Dent Mater
Asunto de la revista:
ODONTOLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Países Bajos