Restorations with EQUIA Forte (GC corp., Tokyo, Japan) will be placed according to the manufacturer recommendations. The site will be isolated with cotton rolls. A sectional metal matrix system and wedge will be placed. GC cavity conditioner (20% polyacrylic acid, GC) will be applied for 10 sec., rinsed and the cavity will be dried with a cotton pellet. EQUIA Forte (GC) will be prepared according to the manufacturer instructions, applied in bulk and compacted with a condenser. The self-curing restoration will be finished after hardening, approximately 2 minutes 30 seconds after the start of the capsule mixing, using Arkansas stones under water cooling. Occlusion and articulation will be checked by using two sided and coloured articulating paper (blue for occlusion and red for articulation) 20 microns thickness. EQUIA Forte restoration will be rinsed and gently dried. EQUIA Forte Coat (GC) will be applied to the surfaces using a micro-tip applicator. The coated surface will be light cured with D-light (GC) for 20 seconds. Patients will be instructed not to eat during one hour after the restoration placement.