Does permanent tooth eruption introduce periodontal pathogens? A preliminary study.

The colonization of the periodontal sulcus by pathogenic oral bacteria may be promoted by the eruption of permanent teeth. To analyse the evolution of the oral microbiota during teeth eruption. Sub-gingival microbiome analyses (16S) of primary teeth and eruption permanent teeth sulci (case-matched) were carried out with periodontitis sample controls. A number of disease-associated bacteria including Tannerella forsythia, Treponema denticola and Fretibacterium sp. HMT 360 have been detected in erupting teeth samples but were absent in primary teeth. The formation of deeper sulcus during permanent teeth eruption may create an early colonization niche for periodontal pathogens in older children or young adults which may be implicated later in periodontal diseases.