الفهرس 
Effect of using light amplified high intensity versus low intensity LEDs curing on the clinical behavior and marginal sealing of direct compound posterior bulk-fill resin composite restorations
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Abstract
Background: delivering sufficient intensity output of curing lights is mandatory to ensure optimum cure and clinical success of bulk-fill resin composite restorations and to avoid undesirable clinical outcomes. Aim: to evaluate the effectiveness of using light amplified high intensity led curing on the clinical performance and marginal sealing of posterior bulk-fill resin composite restorations. Materials and Methods: this study was designed as a randomized, controlled, double-blind, unicenter, parallel, two arm, superiority trial with 1:1 allocation ratio. adult patients who required posterior tooth-colored restorations were asked to participate in this trial. all participants signed written informed consent after being completely aware about the settings of the study. the participants who fulfilled the eligibility criteria were divided into two groups according to the type of light curing mode used. adhesive compound proximal cavities were prepared. all restorative materials were applied according to the respective manufacturer{u2019}s instructions. assessments of the restorations were done at baseline (one week after placement of the restoration), after 6 months and after 12 months using the modified us public health service (usphs) criteria. for quantitative assessment of the marginal sealing, resin replicas were analyzed using scanning electron microscopy