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.

Dr Luitgard G Wiest, Dermatologist and international lecturer, Munich, Germany

Dr. Tobias Wilck, a specialist in oral and maxillofacial surgery, can look back on an impressive career. Born in 1967 in Hamburg, he completed his medical studies at the University of Hamburg and gained experience in Kingston (Jamaica) and Vienna before completing his dental studies in Hamburg and Tübingen. His specialist training took him to Hamburg, Tübingen, and finally to Krefeld-Uerdingen, where he worked as a senior physician. Dr. Wilck is certified in plastic-aesthetic surgery and implantology and has been involved in humanitarian missions in Vietnam since 2010, where he treats children with facial injuries, especially those with cleft lip, jaw, and palate. As a member of the German Society of Oral and Maxillofacial Surgery (DGMKG), Dr. Wilck brings a wealth of expertise and experience to the treatment of his patients.

As one of the world's most recognized prosthodontists and ceramists, Dr. Winter teaches dentists in Spear Workshops to understand the interdependence between laboratory procedures, treatment planning, restorative techniques, materials and laboratory procedures.

In addition to teaching, Dr. Winter produces Spear Study Club modules and creates a variety of clinical content for the Spear learning ecosystem. He has taught more than 900 didactic, clinical and technical courses in more than 40 countries. For the past 36 years, he has maintained a private practice limited to prosthodontics, and currently practices in Newport Beach, California. He is co-founder of Esthetics by Design dental laboratory and is past president of the American Academy of Esthetic Dentistry.

Dr. Winter graduated in 1981 from Marquette University School of Dentistry and completed his prosthodontic specialty residency at the VA Medical Center in Milwaukee in 1983.

Dr Wiskott graduated in 1977. After three years of private practice and internship he earned a doctorate in dental medicine. He then transferred to the United States and in 1982 he received a Master of Science degree in periodontics from the University of Michigan. In 1989 he was awarded a Master of Science in Dentistry degree from About the authorthe University of Washington, specializing in fixed prosthodontics, and in 1998 a PhD degree in biomaterials. Dr Wiskott is the author of about 100 scholarly articles. He teaches and practices dentistry in Geneva, Switzerland.