N.Marzena completed his Graduated as a dentist from the Faculty of Dentistry, Jagiellonian University in Krakow in 1997. Obligatory postgraduate training in Krakow (Wojewódzka Przychodnia Stomatologiczna). 1998 - 2001 had worked in Dent - America dentist's office in Krakow. 2002 - 2005 had been specializing in the field of conservative dentistry with endodontics at the University Dental Clinic in Krakow, where she worked as an assistant, and since 2006 as an older assistant. Became a specialist in conservative dentistry with endodontics in 2006. Member of PTS (Polish Dental Association) since 1997. Has taken part in many conferences and trainings in the field of conservative dentistry, endodontics and pedodentistry.