Dental The optimal flow rate of coolant for sonic and ultrasonic subgingival scaling is A 1-11 ml/min B 14-23 ml/min C 24-32 ml/min D 34-40 ml/min 💡 Explanation The optimal flow rate of coolant for sonic and ultrasonic subgingival scaling is ✓ Correct Answer: B. 14-23 ml/min