Effect of Light‐Emitting Diode (LED) Curing Modes on Resin/Dentin Bond Strength

Abstract

Within the limitations of this study, the shear bond strength of an RLA to dentin was found to be enhanced with light- or dual-polymerized adhesive resin using an LED light in ramp mode, whereas shear bond strength was significantly lower when polymerized using LED in fast or pulse modes.

Effects of light curing modes and ethanol-wet bonding on dentin bonding properties

“…Fahmy et al (2009) reports that the pulse mode and fast mode have similar performance, so we chose high-light mode, soft-start mode, and normal-light mode instead of pulse mode in this experiment. To explore the effects of light modes on dentin bonding properties clearly, the irradiation time of the three modes is selected to be approximately of the same total light energy (Rueggeberg, 1998).…”

The effect of ceramic translucency and thickness on the polymerization of light-cured adhesive resin cement

“…Studies have shown results that favor the use of adhesive resin cements for luting esthetic restorations. Therefore, tooth colored inlays, onlays, laminate veneers and most ceramics are cemented with adhesive resin cements specifically dual-cured (Fahmy, Naguib, & Guindy, 2009;Tango, Sinhoreti, Correr, Correr-Sobrinho, & Henriques, 2007). In addition to the esthetics, the strength of these types of cements was found to be favorable.…”

“…On the other hand, light-polymerized luting agents are used with laminate veneers and have just onepaste with a photoactivator, such as camphorquinone, which is activated with blue light at 470 wavelength. A disadvantage of this light-cured cement is the lack of uniformity in the degree of conversion (Fahmy et al, 2009). In order to understand the limitations of these materials, the polymerization process should be fully understood.…”

“…is that they result in high contraction stresses, which lead to microleakage, marginal discoloration and insufficient shear bond strength. In addition, inadequate polymerization was reported with those PAC curing lights with the short time of cure (3 seconds) (Fahmy et al, 2009;Price et al, 2003).…”

“…The smaller the curing tip, the greater the intensity of light (Price et al, 2003;Strydom, 2002). In addition, dentin topography was considered to likely have an effect on the success of the bonding (Fahmy et al, 2009). HeraCeram ceramic was used in this study on bovine incisors.…”