About the Authors:
Dr. Samer Mheissen is an orthodontic specialist in Syria and owns a private practice. Dr. Samer Mheissen has a special interest in orthodontic evidence. He has published many peer reviewed articles in different orthodontic journals. He is an external referee for Cochrane oral health group, and he has reviewed many papers for orthodontic journals.

Dr. Haris Khan is a Professor of orthodontics at the CMH Institute of Dentistry Lahore/ National University of Medical Sciences, Pakistan. Dr. Khan has many peer reviewed publications in orthodontic journals and has authored a book on orthodontic brackets (Orthodontic Brackets, Selection, Placement, and Debonding). Dr. Khan has delivered various lectures on clinical aspects of orthodontics locally and internationally.