S Vishnu Prasad1, Madan Kumar2, Mahesh Ramakrishnan3, Dhanalakshmi Ravikumar4. 1. Reader, Department of Public Health Dentistry, Karpaga Vinayaka Dental College, Chennai, India. 2. Professor and Head, Department of Public Health Dentistry, Ragas Dental College, Chennai, India. 3. Reader, Department of Pediatric Dentistry, Saveetha Dental College, Saveetha University, Chennai, India. 4. Senior Lecturer, Department of Pediatric Dentistry, Saveetha Dental College, Saveetha University, Chennai, India.