Roberto L. Weinstein graduated with a degree in medicine and surgery in 1972 and received his DDS in 1974 from the University of Milan. He then became a researcher at the same university and an associate professor at the University of Modena. From 1990 to 2017, he served as a full professor and chairman of periodontology at the University of Milan. He is the director of the Department of Biomedical, Surgical and Dental Sciences and the former Dean of Dental Faculty. Dr Weinstein is also a past president of SIdP and is currently the director of Humanitas Dental Center, ICH, in Rozzano, Italy.

Karl H. Wesker is an artist and an illustrator. He has worked for many years on the visualization and didactic presentation of complex structures. He has developed new methods that produce highly detailed and yet esthetically fascinating images of human anatomy. These methods form the foundation of the three-volume atlas of anatomy Prometheus, which is being published by Thieme and for which he has created most of the illustrations.

Dr. Peter Wetselaar, MSc, PhD, dentist and specialist in functional diagnostics and therapy of CMD and tooth wear, Chair in the Department and Clinic of General Dentistry, Academic Center for Dental Medicine Amsterdam (ACTA), Amsterdam/Netherlands

John Whitworth has led endodontic teaching and clinical service at Newcastle Dental School and Hospital, UK for more than 20 years. An active teacher, specialist clinician, researcher and scholar, he is a Past President of the British Endodontic Society, served the International Endodontic Journal as Assistant Editor/Deputy Editor in Chief for 10 years, and served the European Society of Endodontology as Chair of its Education and Scholarship Committee and as an Executive Board member. He has published numerous research articles and contributed to a number of standard textbooks.