He is a professor in periodontology at the Academic Center for Dentistry Amsterdam (ACTA, the joint faculty of dentistry of the University of Amsterdam and the Vrije Universiteit Amsterdam). In addition, Loos is director of research at ACTA. Loos received his dental degree in Amsterdam and his MSc degree in periodontology at Loma Linda University, CA, USA. Thereafter Loos received a Ph.D. degree in Oral Biology at the University at Buffalo, NY, USA. He served as director of the ACTA’s MSc program in Oral Health Sciences and is Director of the EFP-accredited postgraduate periodontology program. Loos is involved in fundamental research-questions related to the immunobiology of periodontal and peri-implant diseases and oral health. His clinical research focusses on relationships between oral health and systemic health, as well as clinical studies in the treatment of peri-implant diseases.