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.

Henrike Wilkes, born in 1977, grew up in a small town between the Ruhr area and the Rhineland, Germany. After graduating from high school, she discovered her passion for people and communication during an au pair stay in Rome. This was followed by a 6-year professional career in the hotel industry in various regions of Germany and in Australia at the time of the Olympic Games. She also completed her two degrees in business administration partly abroad – with a semester at the Università Luigi Bocconi in Milan, and an MBA degree at the University of Stellenbosch Business School, South Africa. During her more than 12 years as an executive and manager in a DAX company in the insurance industry, she specialized in the development of managers and was particularly committed to the interests of women in business. She founded an internal women's network and made films to get more women interested in insurance sales. As she was particularly fascinated by the combination of coaching and leadership, Henrike Wilkes completed various coaching courses to enable her to develop her employees effectively. In addition to traditional coaching methods, she makes use of the unusual, using horses for coaching and in leadership seminars to sharpen participants' senses for non-verbal communication, effectiveness, and authenticity. Her everyday experience with her large and very dominant mare, Swari, shows her that you can learn a lot about leadership from horses. If you would like to find out more about the author, please visit her website at www.henrike-wilkes.de. You can also contact her personally there.

Dr. Winston is a physiatrist, and conducts research on spasticity, spinal cord and nerve injury, and Complex Regional Pain Syndrome through the Victoria Peripheral Nerve and Spasticity Clinic he is also the Medical Director of Rehabilitation and Transitions at Island Health.

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.