Curing-light intensity and depth of cure of resin-based composites tested according to international standards

General dental practitioners' knowledge of polymerisation of resin-based composite restorations and light curing unit technology

“…This figure is little better than that reported by another UK study over 13 years earlier, when only one-fifth of practices had means of checking the efficiency of their LCU. 36 However, several more recent studies 41,50,51 have indicated that the use of radiometers in general dental practice can only provide approximate light intensity readings rather than an accurate calibration of the LCU. The implication of these studies is that radiometers may be useful monitoring devices when used to test intensity values against the value obtained when the LCU was new, as an indication of whether the original intensity is being maintained.…”

Comparing depth-dependent curing radiant exposure and time of curing of regular and flow bulk-fill composites

“…17,18 In fact, depending on the brand and shade, as much as 36 J/cm 2 has been reported to adequately cure some resin composites. 17 While manufacturers do not specify routinely the level of radiant exposure needed to cure their products adequately, it is possible to quantify the radiant exposure delivered to the surface of the composite resin to be cured, and the irradiance of the light that has passed through the specimen during material curing.…”

The influence of light intensities irradiated directly and indirectly through resin composite to self-etch adhesives on dentin bonding

“…Light transmission characteristics are dependent upon shade, translucency, and thickness of resin composite [17][18][19] . In our pilot study, light transmission intensities through each resin composite were measured.…”

“…When the distance between the light source tip and irradiated surface increases, the intensity of the light irradiation reaching the bonded surface decreases. On the other hand, indirect light irradiation intensity of bonding layer is concerned with the type and shade of filled resin composites 13) and their thickness, which affect the light transmission characteristics [14][15][16][17][18][19] of the resin composite. Some studies have demonstrated that a reduction in light irradiation intensity causes lower bond strengths to dentin 10,13) .…”