The invention discloses an application of
lactobacillus paracasei L9 to prevention or treatment
oral disease and regulation of
oral cavity flora. L9 can be used for preparing a medical composition anda food for preventing or treating dental caries. Research proves that L9 can notably relieve generation degree of
occlusal surface E-level dental caries, after the LP is taken, the structure of the
oral cavity flora is changed notably, particularly
actinobacteria is notably increased, the
actinobacteria of L9 group is obviously reduced,
klebsiella, aerococcus,
Gemella,
corynebacterium and
pseudomonas aeruginosa on the classification level are notably reduced, and the
oral disease risk is reduced. When L9 is taken, the
saliva species richness is notably reduced, the relative abundance of oraldisease relevant fungi of
streptococcus salivarius, actinomycetaceae,
peptostreptococcus and the like is notably reduced, and the L9 can have relieving effects on periodonitis diseases. The
dental plaque flora species diversity is notably reduced, the relative abundance of leptothrix, fusobacteriaceaeand
flavobacterium is notably reduced, and the L9 can have relieving effects on oral diseases of
periodontal disease, halitosis, dental caries and the like.