Prof. Ounsi graduated from the school of dental surgery, University of Montpellier, France. He holds a post-graduate degree in endodontics, a master in medical and biological sciences, a research master in oral biology from Saint-Joseph University in Beirut where he taught endodontics, and a PhD in Dental materials from the University of Siena. Prof. Ounsi is assistant-professor at the department of endodontics of the Lebanese University and visiting professor at the department of endodontics and restorative dentistry of Siena University. He is also research associate at the Eng AB Chair for Growth Factors and Bone Regeneration at King Saud University in Saudi Arabia. He is fellow of the International College of Dentists and member of the European Society of Endodontology and the American Association of Endodontists. He authored and co-authored more than 40 publications, and presented and conducted more than 150 lectures, conferences, and courses in 5 continents.