Dental Restorative material which decreases the tensile strength and fracture toughness of dentin, when used during RCT: A Calcium hydroxide. B EDTA. C Sodium hypochlorite. D All of the above. 💡 Explanation Restorative material which decreases the tensile strength and fracture toughness of dentin, when used during RCT: ✓ Correct Answer: D. All of the above.