Dr. Jochen Tunkel completed five years of training in periodontology, graduating as a specialist in periodontology (German Fachzahnarzt). He then moved to Professor Khoury's clinic, where he completed his training as an oral surgery specialist (German Fachzahnarzt) and Master of Oral Medicine in Implantology. During his 3-year postgraduate program he learned the shell technique in detail. During this time, his also focused on soft tissue management for large augmentations and implant-augmentative rehabilitation of periodontally severely compromised patients. After opening his own practice in 2007, he focused his work on the further development of the shell technique. To this end, he initially conducted work on augmentative relining with Dr. Luca de Stavola. Since 2018, he has been working intensively on the allogeneic shell techniqueand has helped it to achieve a breakthrough. In particular, he has focused on the basic principles of allogeneic and autologous shell techniques that improve the success of these methods.

Jens Christoph Türp, DDS, Dr Med Dent, MSc, MA, is a professor in the Department of Oral Health and Medicine, Division of Temporomandibular Disorders and Orofacial Pain, University of Basel Center for Dental Medicine, Basel, Switzerland.

Completed dental school in 2004 at the University of Ferrara. Since 2005, employee at the practice of Dr. Mauro Fradeani in Pesaro. Attended numerous national and international courses, including the annual course by Dr. Mauro Fradeani in 2006 and the implant training by Drs. Marco Redemagni and Giuliano Garlini in 2008. Independent dentist specializing in esthetic conservative dentistry. Speaker at courses and conferences and author of scientific contributions in international journals.

Dr. med. dent. Ulrike Uhlmann studied dentistry at the University of Leipzig and completed her doctorate at the Johannes Gutenberg University in Mainz. She specializes in pediatric and adolescent dentistry and works in a family dental practice near Leipzig. As a mother of four children, she was personally confronted with the topic of oral restrictions for the first time when her first daughter was born in 2013. After her first parental leave, she began to deal more intensively with the topic professionally and completed further training with Dr. Zaghi and Dr. Ghaheri, among others. As interdisciplinary collaboration between speech therapists, midwives, and myofunctional therapists has always been a key aspect of her professional approach, the idea for this book was born of both a personal and professional passion. Dr. Uhlmann is an active member of the Leipzig Tongue Tie Network and works as an author and speaker alongside her work in practice.

Istvan Urban, DMD, MD, PhD, teaches implant dentistry in the graduate program at Loma Linda University in California and is also an adjunct clinical associate professor in the Department of Periodontology and Oral Medicine at the University of Michigan. He has published widely on bone regeneration and soft tissue reconstructive surgery around dental implants and is the author of the textbooks Vertical and Horizontal Ridge Augmentation: New Perspectives (Quintessence, 2017) and Vertical 2: The Next Level of Hard and Soft Tissue Augmentation (2022). Dr Urban is licensed in the state of California and maintains a private practice in Budapest, Hungary.

Dr. rer. nat. Dr. med. Klaus-Peter Valerius studied biology with a focus on anthropology and vertebrate morphology in Berlin and Göttingen, studied human medicine in Gießen; since 1990 working as a scientist at the Institute of Anatomy and Cell Biology at the University of Gießen; assisting in the lectures in pre-clinical and clinical studies of human medicine in the subjects of anatomy and biology.

Dr Frans P. G. M. van der Linden is Professor Emeritus in the Department of Orthodontics at Radboud University Nijmegen, the Netherlands. From 1962 until 1995, he held the position of Professor and Chairman of Orthodontics at the Radboud University Nijmegen. Dr Van der Linden has devoted his professional life to in incorporating basic and clinical research results into the theory and practice of orthodontics, and his long-lasting activities in research and teaching have been widely recognized. He is an internationally recognized lecturer and has published more than 200 papers and a number of books. His main contribution is a series of six textbooks on orthodontics and dentofacial orthopedics.

Prof. Dr. Fridus van der Weijden graduated in 1984 from the State University Dental School in Utrecht, the Netherlands where he also received his training as a periodontist and was accredited by the Dutch Society of Periodontology in 1990. He defended his thesis entitled, "The use of models and indices in plaque and gingivitis trials" in 1993 and received accreditation as a "senior investigator" by the Netherlands Institute for Dental Sciences in 2000.  In 2005 he received accreditation as an"'Implant-specialist" by the Dutch Society of Oral Implantology. Since 1986 Fridus van der Weijden divides his time between the Clinic for Periodontology Utrecht and the Academic Centre for Dentistry Amsterdam (ACTA). He is a frequent lecturer in postgraduate courses and the author of the book entitled, "The Power of Ultrasonics" and the co-author and co-editor of the book "Preventive Dentistry".  He has also authored and co-authored approximately 120 national and 250 international publications. The Ivory Cross awarded to him in early 2009 with the Carl Witthaus Medal of honor for his work on prevention and propagation of oral health. Early 2010 he has been appointed as professor at the University of Amsterdam with "Prevention and Therapy of periodontal infections" as main focus for his research. This special chair has been an initiative of the Dutch Society of Periodontology. In 2016, the Academic Centre for Dentistry has provided him with a regular chair position.

Dr Van Dooren attended the Katholieke University in Leuven, Belgium, where he received his degree in dentistry in 1982. After graduation, he opened a private practice in periodontics, fixed prosthodontics, and implants in Antwerp, Belgium. He is an active member of the European Academy of Esthetic Dentistry. Dr Van Dooren lectures nationally and internationally mainly on esthetics, implants, and esthetic periodontal surgery.

Dr. Hans van Pelt, MSc, PhD, dentist and specialist in prosthodontics (EPA) and restorative dentistry (NVvRT), Visiting Clinical Professor, Medical Center, University of Groningen/Netherlands