Leo Tjäderhane was born 1962 in Ylitornio, Lapland, Finland. He graduated from the University Oulu, Finland in 1986, where he also received his PhD in 1995 and the licensed specialty in cariology, restorative dentistry and endodontology in 2000. He worked as the post-doctoral fellow at the University of British Columbia (UBC) in Vancouver, Canada, in 1995-1996, as an assistant professor at the Department of Endodontology, University of Toronto in 2001-2002 and at the University of Helsinki, Finland in 2002-2003. Later, he worked as a research fellow for the Academy of Finland in 2003-2008, after which he was appointed as a professor at the University of Oulu in 2008.

Leo Tjäderhane is currently holding the position as the professor and head of the Division of Cariology and Endodontology at the University of Helsinki and the senior consultant at the Helsinki University Hospital. Leo’s research interests include the dentin-pulp complex biology and pathology and the adhesion of composites. He has published over 240 scientific original or review articles in international and more than 50 articles in national journals, and supervised two MSc and 15 PhD theses. Leo also served as the member of the ESE Executive Board and the head of Research Committee in 2012-2020.