The effect of adhesive material and thermocycling on bond strength of intraoral repair materials on adhesive fracture in porcelain fused to metal restoration

Porcelain fused to metal restoration often fails in the form of adhesive fracture in the porcelain veneered layer. Intraoral repair can be used to repair this type of fracture. In intraoral repair, adhesive material is used for bonding chemically to the oxide layer on the metal surface. 10-MDP adhesive material is commonly used in dental practice. Another adhesive used is 6-MPHA because it is a new adhesive material that has a C-P bond in the middle of the compound chemistry which more stable and can withstand harsh chemical treatments. Bond strength of the adhesive material is affected by usage (aging). Aging can be simulated by using thermocycling in laboratorium research. Objectives: to determine the effect of 6-MPHA, 10-MDP on the adhesive strength of intraoral repair materials on adhesive fractures of PFM restorations in the thermocycling group of 500, 1000, and 3000 cycles, and to determine the effect of thermocycling 1000, 3000 cycles on adhesive strength of intraoral repair materials in adhesive fractures of PFM restorations using 6-MPHA and 10-MDP adhesives. Material and method: Sampel was made in the form of cylindrical metal with a diameter of 7 mm and a thickness of 3 mm with total sampels 30 pieces.&nbsp