Dr. Petridis qualified from the Dental School of Aristotle University of Thessaloniki, with Honors, ranking 1^st in class during both the years of studies and graduation (1994).  He continued his studies at Tufts University, Boston, U.S.A. where he completed an Advanced Education Programme in Prosthodontics (1997) and acquired a Master of Science degree (1998).  He completed his postgraduate studies with a PhD degree from Aristotle University (2001).

From 2000 to 2012 Dr. Petridis maintained a private practice in Thessaloniki, Greece where he practiced all aspects of dentistry with an emphasis on Restorative, Esthetic and Implant Dentistry while, at the same time, he was an Assistant Professor in Prosthodontics at the Dental School of Aristotle University of Thessaloniki.  Since 2012, he has also maintained a private practice in London. 

In 2012, Dr. Petridis relocated to London accepting the position as a Senior Clinical Lecturer (Associate Professor) in the Prosthodontic Unit at UCL Eastman Dental Institute.  In 2019 he was appointed Professor and Chair of Prosthodontics.  He is currently serving as Director of the Master in Clinical Dentistry (Advanced Training)  in Prosthodontics program.  He has authored and co-authored a number of scientific papers published in international peer-reviewed journals, and has headed several past and current research projects in the field of Prosthodontics and Aesthetic dentistry. 

Dr. Petridis is currently registered with the GDC, in the Prosthodontics specialist list, and is also on the list of recognized specialists in Prosthodontics issued by the European Prosthodontic Association.  He is a member of the International College of Prosthodontists, the Academy of Osseointegration, the European Prosthodontic Association, the Cochrane collaboration Oral Health Group, and an affiliate of the European Academy of Esthetic Dentistry.