Interface seal of incremental placement of visible light-cured composite resins

An investigation was conducted to determine the quality of seal at the interface when a visible light-cured composite resin was placed and cured in increments. Five samples of each of the following composite materials were tested: Aurafill, Command, Command Ultrafine, Durafill, Prisma-Fil, and Silux. Samples of each material were placed in a thermocycling dye bath that contained a 0.5% aqueous solution of basic fuchsin dye for 25 hours. The samples were removed from the dye bath, rinsed, dried, and prepared for examination with a x25 microscope by two examiners. Neither examiner reported dye penetration at the interface of the materials tested. These findings effectively highlight the practicality of the incremental placement of light-cured composite resins.