Persin Leonid Semenovich - Professor, Doctor of Medical Sciences, Head of the Department of Orthodontics at the Moscow State Medical and Dental University. A.I. Evdokimova, Corresponding Member of the Russian Academy of Sciences, Honored Scientist of the Russian Federation. Leonid Semenovich has been working in the field of dentistry since 1969.
He is the vice-president of the Professional Society of Orthodontists of Russia. Chief editor of the magazine "Orthodontics". Author of more than 500 scientific articles, books, textbooks, monographs.