Introduction: Dental caries is a specific disease caused by long-term contact between the host, diet, and microorganisms on the tooth surface. This causes the inorganic parts of the enamel and dentin to break down. Aim: This study aimed to assess the clinical and radiological effectiveness of using Simvastatin in combination with Biodentine as a pulpotomy agent for vital primary molars. Materials and Methods: sixty primary molars in 20 children aged from 4-7 years old were selected