The influence of chemical activation on tooth bleaching using 10% carbamide peroxide.

The aim of this study was to assess the influence of manganese gluconate, a chemical activator of bleaching agents, at a concentration of 0.01% on the efficiency of a 10% carbamide peroxide-based bleaching agent. Forty bovine incisors were immersed in a 25% instant coffee solution for seven days and randomly divided into two groups.

Effects of resinous monomers used in restorative dental modeling on the cohesive strength of composite resin.

Purpose: The purpose of this study was to evaluate the cohesive strength of the composite using different resinous monomers to lubricate instruments used in the Restorative Dental Modeling Insertion Technique (RDMIT).

Materials And Methods: The composite specimens were made by usinga prefabricated Teflon device. Different resinous monomers were used at the interface to lubricate the instruments, for a total of 72 specimens divided into 6 groups: (1) control group, no resinous monomer was used; (2) Composite Wetting Resin; (3) C & B Liquid; (4) Scotchbond Multi-Purpose Adhesive; (5) Adper Single Bond Adhesive; (6) Prime & Bond NT.