Dr Frans P. G. M. van der Linden is Professor Emeritus in the Department of Orthodontics at Radboud University Nijmegen, the Netherlands. From 1962 until 1995, he held the position of Professor and Chairman of Orthodontics at the Radboud University Nijmegen. Dr Van der Linden has devoted his professional life to in incorporating basic and clinical research results into the theory and practice of orthodontics, and his long-lasting activities in research and teaching have been widely recognized. He is an internationally recognized lecturer and has published more than 200 papers and a number of books. His main contribution is a series of six textbooks on orthodontics and dentofacial orthopedics.