Orthodontics: Prep Manual for Undergraduates About the Author Sridhar Premkumar MDS is a well-recognized book author currently working as Professor of Orthodontics and Dentofacial Orthopaedics and Head, Department of Pediatric and Preventive Dentistry at Tamil Nadu Government Dental College and Hospital, Chennai, India.  He joined Tamil Nadu Government service by securing First rank in the Public service commission examination. He has numerous publications to his credit and is an active researcher; acclaimed speaker in national forums and reviewer in international and national journals.  He is a certified biomedical waste trainer for Tamil Nadu Health Systems Project and also certified Reiki and Pranic Healer.  Recipient of state awards  • Two times “State Best Clinical Award” conducted by Indian Dental Association, Tamil Nadu chapter  • “Best Teacher for Dental Faculty” in the year 2010 by the Tamil Nadu Dr MGR Medical University  Recipient of national awards  • Three Times “All India Best Research paper” award conducted by Indian Orthodontic Society including the 8th Asia Pacific Orthodontic Conference (APOC) and 47th Indian Orthodontic Conference (IOC) International recognition • Co-authored presentation in American Association of Orthodontics meeting at Boston, 2009.  • Name included among the biographic records in “2013, 30th Pearl Anniversary edition of Who’s Who in the World: Published from USA” as an honour  Author of the following Books  Has authored 5 Textbooks out of which three books are published by Elsevier.  1. Graber's Textbook of Orthodontics: Basic Principles and Practice, 4e 2. Orthodontics: Exam Preparatory Manual for Undergraduates, 2e  3. Textbook of Orthodontics.