Critical analysis of the influence of different parameters on the microtensile bond strength of adhesives to dentin.
J Adhes Dent
; 10(1): 7-16, 2008 Feb.
Article
en En
| MEDLINE
| ID: mdl-18389731
ABSTRACT
PURPOSE:
To evaluate how six different test parameters (TP) of the microtensile bond strength (microTBS) methodology influence the test outcome. MATERIALS ANDMETHODS:
The microtensile bond strength of adhesives bonded to dentin was measured, and the resultant failure patterns and stress-time graphs were analyzed, varying the microTBS specimen-fixation mode (TP1), the microspecimen geometry (TP2), the microspecimen bond surface area (TP3), the remaining dentin thickness of the microspecimens (TP4), the procedure employed to glue the microspecimen to the microTBS jig (TP5), and the microTBS crosshead speed (TP6).RESULTS:
The orientation of the microspecimens to the actual interface primarily influenced the resultant microTBS value and the eventual failure pattern. A notched jig consistently yielded significantly higher mciroTBS values than samples fixed onto a flat jig or following a "top-bottom" design (TP1). A higher bond strength, a lower standard deviation/coefficient of variation, a failure closer to the interface, and a more representative number of specimens per tooth were obtained for nontrimmed, square microspecimens (TP2). The most reproducible results were obtained using square specimens of 1 mm2 (TP3), which could also be most easily prepared. The remaining dentin thickness (TP4) was an influential factor as well, whereas the microspecimen gluing protocol (TP5) and the crosshead speed (TP6) appeared less influential.CONCLUSION:
As several test parameters significantly influenced the microTBS outcome, sufficient attention should be paid to these methodology variables with regard to the microTBS-test reliability and reproducibility.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Recubrimiento Dental Adhesivo
/
Recubrimientos Dentinarios
/
Dentina
Tipo de estudio:
Clinical_trials
Límite:
Humans
Idioma:
En
Revista:
J Adhes Dent
Asunto de la revista:
ODONTOLOGIA
Año:
2008
Tipo del documento:
Article
País de afiliación:
Bélgica