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Research on caries bacteria strains

What do you think, when a doctor tells a patient about pathogenic bacteria in the oral cavity, does this contribute to hygiene? Scientists believe that the results of a recent study on the content of specific strains of bacteria and fungi in the mouth will finally make patients think.

The study involved 25 adults with no signs of caries. They took samples of bacterial biofilms from the interdental space. According to the analysis results, Streptococcus and Lactobacillus bacteria were isolated in the microflora of all participants, while Streptococcus mutans bacteria were found in only 28% of the samples. The authors came to the conclusion that even people without signs of caries need to use dental floss or a special interdental brush to clean the cavity of traces of these bacteria.

“The data obtained will significantly improve the condition of the teeth and gums of adults and young people. But at the moment, the standard technique of medical examination does not involve studying the composition of microflora in the oral cavity, ”says the head of the study, Ph.D. Denis Bourgeois, teacher at the Department of Health and Disease Prevention, Faculty of Dentistry, University of Lyon.

According to statistics, there are more than 2 billion cases of caries in the world, and more often than not, the disease affects people under the age of 35. A study of the composition of the microflora of the oral cavity will help to better understand the etiology of caries in the interdental areas and find ways to prevent it.

This study first examined the composition of bacterial biofilms in healthy people, so at this stage it is not clear which of the selected microorganisms positively and negatively affect oral health.

In the interdental area, biofilms, difficult to clean, grow, which are formed by colonies of various bacteria.

“In this area, not only gingivitis and other periodontal diseases begin to form, but also interdental caries.”

The study included 25 adult European (15 men and 10 women) without signs of caries, aged 20 to 35 years. Participants’ healthy eating index is at least 80. Participants also noted that they had never used dental floss or interdental brush. However, they do not have caries, tooth loss or fillings.

The researchers collected biofilm samples from 4 interdental areas: between 15 and 16, 25 and 26, 35 and 36, 45 and 46 teeth. The number of bacteria of the following species was estimated: Streptococcus, S. mutans, Lactobacillus, Enterococcus, Enterococcus faecalis; Candida albicans and the total number of bacteria.

Scientists note that a small number of participants, as well as their belonging exclusively to residents of European countries, could affect the objectivity of the study.

Nevertheless, the potential role of these bacteria in the formation of systemic diseases suggests the need to remove bacterial biofilms in the interdental space for preventive purposes.

Based on the results obtained, protocols of new therapeutic and hygienic dental procedures can be developed. For example, microinvasive treatment of interdental caries, or non-invasive prophylactic treatment. Doctors are also advised to inform patients of the importance of using interdental brushes and threads.

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