Prof. Dr. Norbert Gutknecht, full professor at RWTH Aachen University, Vice-Director of the Clinic for Operative Dentistry, Periodontology and Preventive Dentistry. Director of the AALZ – Aachen Dental Laser Center at RWTH Aachen Campus and Director of the Master of Science course “MSc in Lasers in Dentistry” at RWTH Aachen University. CEO of the WFLD – World Federation for Laser Dentistry and President of the DGL – German Society for Laser Dentistry.