Composition and application mode of materials used in the study
carious
CAVITY
* MDP = 10-Methacryloyloxydecyl dihydrogen phosphate; HEMA = 2-hydroxyethylmethacrylate; Bis-GMA = bisphenol-A glycidyl methacrylate; Bis-EMA = bisphenol-A ethoxylated dimethacrylate; UDMA = urethane dimethacrylate; TEGDMA = triethyleneglycol dimethacrylate; AUDMA = aromatic urethane dimethacrylate; 1,12-dodecane-DMA = 12-dodecane dimethacrylate.For the In group, each increment of composite resin was removed from the compule, shaped into a ball using the right thumb and index finger, and then placed in the cavity with a resin spatula. The operators wore new and clean gloves immediately before the restorative procedure to avoid contamination with saliva or carious tissue removal. Gloves and spatulas were cleaned with 70% alcohol and dried with absorbent paper between each incremental layer. In the BSy groups, one 4-mm-thick layer was placed at the bottom of the cavity, as described in the In group. However, for BCa groups, the material was dispensed using the Mark IIIP™ Speed Slot Syringe (Centrix, Shelton, CT, USA), and the composite resin was inserted directly into the cavity without any previous manipulation. Batch numbers, compositions of materials, as well as adhesive and restorative procedures used in the study according to each group are detailed in Adhesive system and restorative materials photopolymerization were performed using the Radii Cal (SDI, Victoria, Australia) light unit at 1,200 mW/cm