Laboratory study and clinical application of adhesive marginal fit of dental hard tissue restorations

BACKGROUND: Dental caries is the most common disease of oral cavity, which can usually be treated by direct composite restoration.
 AIM: To assess quality marginal fit adhesive systems and photocomposites to hard tissues tooth.
 MATERIALS AND METHODS: A scanning electron microscopic study was conducted with 30 restorations on teeth previously removed for medical reasons using a 7th-generation system from universal group various manufacturers materials. The experiment included Tetric N-Bond Universal (Ivoclar Vivadent), PrimeBond (Dentsply Sirona), OptiBond (Kerr), materials (OptiShade, сeram.х SphereTec, N-Ceram). All these adhesives used any enamel dentin conditioning technique or dual-curing composites; thus, their use relevant in orthopedic dentistry. Teeth sections were made microscopy performed.
 RESULTS: self-etching produced different results after studying diffraction patterns restorations. (Kerr) had best fit, followed Vivadent) Prime Bond Sirona). clinical case restoration combination class 5 3 cavities according Black represented OptiShade material.
 CONCLUSION: violation material zone contact tooth noted 60% cases when Ceram.x SphereTec Sirona) Universal; 20% N-Ceram adhesive; 10% (Kerr). should applied brush.