Biofilmsinducerade orala sjukdomar

English summary What do we know about biofilm-induced diseases in the oral cavity? Nor Tannlegeforen Tid. 2025; 135: 10-6. Caries and periodontal/peri-implant diseases are two of the most common oral diseases, and, according to the most recent definitions, are considered non-communicable biofilm-induced diseases . In the 1970s, caries and periodontal diseases were prevalent across all Nordic countries. However, today, for most younger generation individuals, caries rates are very low, whilst gingivitis and periodontitis remain common in the adult populations of the Nordic countries. These dental diseases also affect the elderly due to longer tooth retention. Caries and, in particular, periodontal diseases are associated with several systemic conditions, although a direct causality remains elusive, and the relationship may be partly explained by the other factors. According to the integrated hypothesis of dental caries and periodontal diseases, the biofilm is considered a common risk factor alongside fermentable carbohydrates. Therefore, these two oral diseases could be simultaneously controlled by addressing common risk factors. However, due to differences in pathogenesis, separate management procedures are recommended for each disease, which are well-integrated into the dental practices in the Nordic countries. In conclusion, etiology and pathogenesis are well described for caries and periodontal diseases. Both share some essential risk factors, but most importantly, management of these diseases requires adequate oral hygiene and discipline concerning fermentable carbohydrate intake.