Theodore Eliades graduated from the School of Dentistry, University of Athens, Greece, completed the Orthodontic postgraduate program of the Ohio State University, and earned a Master's from Ohio State, a doctorate from the University of Athens, School of Medicine, and a PhD from the University of Manchester. His research has generated 90 papers and 15 book chapters, which elucidated the in vivo ageing pattern of orthodontic materials and resultant clinical implications, receiving 800 citations. He has co-edited books on ageing of biomaterials (Quintessence), bonding to dental tissues (Springer), orthodontic materials (Thieme), orthodontic practice risk management (Quintessence), and self-ligating brackets (Wiley-Blackwell), some translated into 3 languages. A Fellow of the Institute of Materials, Minerals and Mining, and member of the Royal Society of Chemistry and the Institute of Physics, Dr. Eliades is affiliated with Universities in the US (Texas-Houston and Marquette) and EU (Manchester and Bonn), is an Associate Editor of the European Journal of Orthodontics, and the American Journal of Orthodontics and Dentofacial Orthopedics, Editorial Board member in 5 and reviewer in 22 periodicals.Gottfried Schmalz: Since 1986 President of various national and international organizations, (CED-IADR, Pan-European Federation, Pulp Biology and Regeneration Group of IADR). German Representative in the Advisory Committee of the EU for Dental Education, Honorary member of several scientific organizations, 2007 Distinguished Scientist Award of IADR. Member of the German Academy of Sciences (Leopoldina). Editor-in-Chief of our journal Clinical Oral Investigations.