Dr Kehn E. Yapp is an Australian endodontist in Melbourne. He obtained his Bachelor of Dental Science degree in 2008 and completed his Doctor of Clinical Dentistry in Endodontics in 2013, both from The University of Melbourne. In 2014, he began specialist endodontic practice in regional New South Wales and returned to Melbourne in 2019 where he maintains an endodontic private practice. He completed a Doctor of Philosophy at The University of Sydney in 2023 on clinical history and diagnostic imaging performance of cone beam computed tomography (CBCT) in endodontics. Dr. Yapp's professional interests include: providing high quality endo-restorative care to patients, ergonomic microscope team training and endodontic applications of CBCT imaging. Kehn has lectured at several international and Australian endodontic conferences in the areas of: restoratively driven endodontics, diagnostic testing and decision theory and efficient use of the operating microscope. He is a keen skiier and enjoys cooking. Dr. Carlos Aznar Portoles received his Bachelor of Dental Surgery in 2004 and a Master of Science in endodontics in 2009, both from the International University of Catalonia. In 2014, he completed a Postgraduate Program in Endodontics at the Academic Centre for Dentistry Amsterdam (ACTA) in The Netherlands. Carlos runs a private practice limited to endodontics and endodontic microsurgery in Haarlem, The Netherlands. He is the author of several endodontic related articles and lectures regularly at national and international meetings. Carlos is a specialist member of the Dutch and Spanish endodontic associations. In his free time he enjoys playing tennis, running and skiing.