2.4. MTA Group
When hemostasis was established, MTA as a white powder (ProRoot; Dentsply, Tulsa, OK, USA) was prepared as was instructed by the manufacturers and then placed in the pulp chamber using a carrier (G. Hartzell & Son, Concord, CA, USA, #ISS52, 1.8 mm). After, it was gently squeezed with a moist cotton pellet for better adaptation to the pulp chamber. Then, it was covered with a thickness of 2 mm layer of low viscous cement type of GI (Fuji II, GC, Japan) [