finished dental school in 1988 at the Rijksuniversiteit van Groningen. He worked as a dentist in the Royal Dutch Navy and several private practices for a period of 5 years. In 1991, he started his Master of Science training in periodontology at the University of Amsterdam. After finishing his training in 1994, he worked as periodontist in 2 referral clinics restricted to periodontology. In 1996, he founded his own clinic in Rotterdam. In his clinic he works as a specialist in periodontology and implantology. The last 20 years the emphasis in patient treatment has been on the interdisciplinary planning (Proclin Rotterdam) together with endodontists, orthodontists, prosthetic dentists, dental technicians and oral surgeons. From 1995 to 2001, Dick Barendregt was on the board of the Dutch Society of Periodontology (NVvP) as treasurer. Since 2017 he is chairman of the Advisory Board of the Dutch Institute on Guidelines in Dentistry. Dick Barendregt received his PhD degree on his thesis “Probing around teeth” on November 4th 2009 and was appointed on July 1st 2019 as Adjunct Professor at the Department Periodontology, Adams School of Dentistry at the University of North Carolina. He also lectures in both national and international meetings.