Dr. Nelson Oppermann is an Orthodontist with more than thirty years of experience, been involved with the Bioprogressive, Sectional Mechanics and MEAW Studies. Recently, together to a team of experts, developed the temporary overlays guided orthodontics concept – TOGO – based on Prof. Rudolf Slavicek foundations. Academically, is involved as adjunct professor at the Department of Orthodontics at the University of Illinois at Chicago – UIC – USA for more than fifteen years and also to Vienna School of Interdisciplinary Dentistry – VieSID. Currently is involved with studies related to the interrelation between occlusion, craniomandibular growth and mandible repositioning, being published articles on important dentistry journals. Apart of those attributions Dr. Oppermann is an active and enthusiastic professor and lecturer, being visited many countries for teaching, with articles published based on physiological treatment concepts.