Dr. Mark Thomas Sebastian passed his state examination and doctorate at the Private University of Witten-Herdecke, Germany. His assistant time lasted until 1996 with study visits to Brazil, USA and South Africa.
In the practice of Dr. Josef Schmidseder, Munich, one of the first German pioneers in aesthetic dentistry he was a junior partner specializing in periodontology and implantology for three years. At that time he also was a scientific editor in the "European Journal of Aesthetic Dentistry". Also, he started to give lectures on plastic periodontal surgery and published the book "Periodontology - State of Science - American Academy of Periodontology".
In 1999 he founded his own practice in Munich with a focus on aesthetic restorative dentistry, periodontology and implantology. Since 2000 he has been a scientific member of the editorial team of the journal “Quintessenz” published by Quintessenz Verlag, Berlin.
He is one of the founding members of the first European “Seattle study club SSC” in Tegernsee, 2008. The German Society for Aesthetic Dentistry DGÄZ named him in 2014 as a “Specialist in Aesthetic Dentistry and Function”.
He completed the master's degree in the function of the chewing organ with Professor Slavicek, Vienna, in 2015. Since then, he has lectured for orthopedic surgeons on the connection between dentistry, orthopedics and bruxism. Since 2016 he has been a member of the "Invisalign academic aesthetic advisory board".
For Invisalign he works as a global speaker and KOL internationally. In 2011 he attended the first DSD course in Europe in Florence. Since then he has implemented the idea of Facial Driven Dentistry in his treatment concept.
Today he held international lectures and courses on Aligner orthodontics, aesthetic dentistry and function.