Rapid high-intensity light-curing not recommended for flowable bulk-fill composites: Study
According to a recent research published in the Journal of Dentistry, it has been observed that rapid high-intensity light-curing cannot be recommended for flowable bulk-fill composites since it may compromise the tooth-restoration interface.
Rapid high-intensity light-curing of dental resin composites is attractive from a clinical standpoint due to the prospect of time-savings
MatejPar and colleagues from the Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia carried out the present study with the objective to investigate the effect of rapid high-intensity light-curing on the marginal integrity of four bulk-fill composites, including two materials specifically designed for high-intensity curing.
Class V cavities were prepared on buccal surfaces of intact human molars with simulated pulpal pressure, filled in a single increment and light-cured using a conventional (10 s @ 1,340 mW/cm2) or high-intensity (3 s @ 3,440 mW/cm2) protocol.
The restorations were subjected to thermo-mechanical loading (TML) comprising 1,200,000 mechanical loading cycles and 3,000 thermocycles. Quantitative margin analysis was performed before and after TML using a scanning electron microscope, and the marginal integrity was expressed as percentage of continuous margin (PCM).
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