Anastasios Retsas graduated from Dental School of the National and Kapodistrian University of Athens in 2012. During the years 2012-2015 he remained as a clinical instructor in the preclinic lab of the department of Endodontics in the abovementioned school, while working as a general dentist with special interest in Endodontics. Later on, during the period 2015-2018 he followed and successfully completed the 3-year postgraduate program in Endodontics of ACTA Dental School of the University of Amsterdam, in the Netherlands. Since then, he has been working as an endodontist in a referral clinic limited to endodontic cases in the Hague, Netherlands. Furthermore, he still engages in the field of dental research, and for the academic year 2020-2021 he remained as a clinical instructor in ACTA Dental School.