David Couchat, after graduating from Dental School at Marseille University (France) in 1990, he specialised in orthodontics and dentofacial orthopedics and got a post–graduate certificate of Special Clinical Studies in Orthodontics (CECSMO). Shortly afterwards, he established his own orthodontic practice in Marseille and a few years later in Paris. He trained in Lingual orthodontics with Dr. Didier Fillon (Post graduate course) and he is founding member and scientific president of the SFOPA (French Association of Aligners); member of the FFO (French Federation of Orthodontics). He is, also, general secretary of the French Association of Specialists in Orthodontics (SFSO).