Effect of light-curing units on push-out fiber post bond strength in root canal dentin


Autoria(s): Calixto, L. R.; Bandéca, M. C.; Silva, F. B.; Rastelli, Alessandra Nara de Souza; Porto-Neto, S. T.; Andrade, M. F.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

27/05/2014

27/05/2014

01/08/2009

Resumo

The purpose of this study was to evaluate the effectiveness of different light-curing units on the bond strength (push-out) of glass fiber posts in the different thirds of the root (cervical, middle and apical) with different adhesive luting resin systems (dual-cure total-etch; dual-cured and self-etch bonding system; and dual-cure self-adhesive cements), Disks of the samples (n = 144) were used, with approximately 1 mm of thickness of 48 bovine roots restored with glass fiber posts, that were luted with resin cements photo-activated by halogen LCU (QTH, Optilux 501) and blue LED (Ultraled), with power densities of 600 and 550 mW/cm 2, respectively. A universal testing machine (MTS 810 Material Test System) was used with a 1 mm diameter steel rod at cross-head speed of 0.5 mm/min until post extrusion, with load cell of 50 kg, for evaluation of the push-out strength in the different thirds of each sample. The push-out strength values in kgf were converted to MPa and analyzed through Analysis of Variance and Tukey's test, at significance level of 5%. The results showed that there were no statistical differences between the QTH and LED LCUs. The self-adhesive resin cement had lower values of retention. The total-etch and self-adhesive system resin cements seem to be a possible alternative for glass fiber posts cementation into the radicular canal and the LED LCU can be applied as an alternative to halogen light on photo-activation of dual-cured resin cements. © 2009 Pleiades Publishing, Ltd.

Formato

1867-1871

Identificador

http://dx.doi.org/10.1134/S1054660X09150067

Laser Physics, v. 19, n. 8, p. 1867-1871, 2009.

1054-660X

1555-6611

http://hdl.handle.net/11449/71097

10.1134/S1054660X09150067

2-s2.0-68949211020

Idioma(s)

eng

Relação

Laser Physics

Direitos

closedAccess

Palavras-Chave #Blue LEDs #Bond strength #Bonding systems #Crosshead speed #Dual-cure #Fiber posts #Light-curing units #Load cells #Luting resins #Material test system #Photo-activated #Power densities #Push-out #Resin cement #Root canals #Self-adhesive #Self-etch #Statistical differences #Steel rod #Strength values #Universal testing machines #Bond strength (materials) #Cell membranes #Cements #Curing #Fibers #Glass fibers #Hydraulic structures #Light transmission #Load testing #Regression analysis #Resins #Steel testing #Glass bonding
Tipo

info:eu-repo/semantics/article