Effect of Wet and Overwet Dentin on the Clinical Performance of Two Universal Adhesive Systems

This is a four-arm, double-blind, randomized controlled clinical trial. Control group 1: 50 non-carious cervical lesions (NCCL) will receive composite resin restorations using an universal adhesive (Ambar Universal APS Plus; FGM) on wet dentin in the etch-and-rinse application strategy. Control group 2: 50 non-carious cervical lesions (NCCL) will receive composite resin restorations using an universal adhesive (Prime\&Bond Active; Dentsply Sirona) on wet dentin in the etch-and-rinse application strategy. Experimental group 1: 50 non-carious cervical lesions (NCCL) will receive composite resin restorations using an universal adhesive (Ambar Universal APS Plus; FGM) on overwet dentin in the etch-and-rinse application strategy. Experimental group 2: 50 non-carious cervical lesions (NCCL) will receive composite resin restorations using an universal adhesive (Prime\&Bond Active; Dentsply Sirona) on overwet dentin in the etch-and-rinse application strategy LCNCs will be randomized to universal adhesive usage and dentinal moisture levels. All groups will be light-cured with a lightcuring device (Quazar, FGM) with a light intensity of 900 mW/cm² for 10 seconds. Operators will restore the cervical area by applying three increments of resin (Llis-FGM for experimental groups 1 and 2; and TPH Spectrum-Dentsply for experimental groups 3 and 4). Each increment will light cure for 20 s at 900 mW/cm2 (Quazar, FGM). Restorations will be finished immediately with fine and extra fine diamond burs and polished with polishing spirals.