IRCT2016041120004N4 IRCT 2016-05-25 Islamic azad dental university Long term effects of Theracal in partial pulpotomy of human dental pulp Clinical,radiological,histological long term effects of Theracal in partial pulpotomy of human dental pulp 2014-12-31 anticipated 1 Complete https://irct.ir/trial/17758 interventional Randomization: N/A, Blinding: Single blinded, Placebo: Not used, Assignment: Single, Purpose: Supportive. N/A Vital pulp therapy. Before the operative protocol, the tooth will be radiologically examined to exclude the presence of caries or periapical pathology. Thermal testing and electric sensitivity testing will perform to assess pulp vitality. Before cavity preparation, the tooth will mechanically be cleaned and disinfected with 0.2% chlorhexidine solution. After local anesthesia (Septodont, Saint Maur des Fosses, France) and rubber dam application, occlusal Class I cavities will prepare by using round sterile diamond bur at high speed under air-distillated water spray coolant. An exposure of approximately 1.2 mm in diameter will be made with round carbide bur (4 1.2 mm) under sterile saline cooling. Bleeding will be controlled with saline irrigation, and a sterile cotton pellet is placed onto the pulp exposure site and will be capped with Theracal according to the manufacturer’s recommendations. Theracal is a calcium silicate resin based material that cures in 20 seconds and is used for direct and indirect pulpcapping. It contains approximately 45% wt mineral material, 10% wt radiopaque component, 5% wt hydrophilic thickening agent and approximately 45% resin. The patent stated that the resin consists of a hydrophobic component such as urethane dimethacrylate, bisphenol A-glycidyl methacrylate, triethylene glycol dimethacrylate and a hydrophilic component such as hydroxyethymethacrylate and polyethylene glycol dimethlacrylate. After placing a 2 mm layer of Theracal paste and polymerization for 20 s, the teeth will be provisionally restored with glass ionomer cement (GC).After a year after radio graphical and clinical examinations the tooth will be extracted and will be sent to a talented pathologist..