Universiteit van Amsterdam (UVA) Dec 5 2025 Real progress in oral health doesn't come from expensive gadgets, but from better daily habits. That is the conclusion of dentist- periodontist Tim Thomassen in his dissertation Oral Disease Prevention, which he will defend on 12 December at the University of Amsterdam. In his research, he examines how effective different types of toothbrushes are and how much impact the actual time people spend brushing has on oral health. Worldwide close to 3,5