Bacteria in Oral Health: Types, Impact, and Prevention
What types of bacteria are present in the mouth?
The oral microbiota is a diverse ecosystem composed of different types of bacteria that can be classified into:
✔️ Commensal bacteria: These are part of the normal microbiota and help maintain the balance of the oral ecosystem. Example: Streptococcus salivarius
✔️ Pathogenic bacteria: These are responsible for dental diseases when they proliferate unchecked. Example: Streptococcus mutans (associated with caries) and Porphyromonas gingivalis (related to periodontitis)
✔️ Opportunistic bacteria: These are harmless under normal conditions but can become pathogenic if there is an alteration in the immune system or the oral microbiota
Impact of bacteria on oral health
🔹 Dental caries: Streptococcus mutans metabolizes sugars and produces acid, demineralizing tooth enamel
🔹 Periodontal disease: Porphyromonas gingivalis and Treponema denticola contribute to gum inflammation and bone destruction
🔹 Halitosis: Some bacteria produce volatile sulfur compounds responsible for bad breath
🔹 Bacterial endocarditis: Oral bacteria can enter the bloodstream and cause infections in patients with cardiovascular diseases
Factors that promote harmful bacterial growth
✔️ Poor oral hygiene that allows plaque accumulation
✔️ Excessive consumption of sugars that feed acid-producing bacteria
✔️ Dry mouth (xerostomia), which reduces the protective action of saliva
✔️ Prolonged use of antibiotics, which disrupts the balance of the microbiota
How to prevent excessive growth of pathogenic bacteria
✔️ Proper tooth brushing with fluoride toothpaste after each meal
✔️ Use of dental floss to remove interdental plaque
✔️ Consumption of probiotic-rich foods that promote a healthy oral microbiota
✔️ Regular visits to the dentist for professional cleanings
Conclusion
Bacteria play a key role in oral health. Maintaining a balanced microbiota through proper oral hygiene and healthy habits is essential to prevent dental diseases.
Legal Notice and Disclaimer
This article is part of ONAK's Medical Terminology Dictionary and is for informational purposes only. It does not replace consultation with a dentist.
Bibliography
- Marsh, P. D., Zaura, E. "Dental plaque biofilm: ecological interactions and role in oral disease." Clin Microbiol Rev. 2017; 30(4): 877-918. Available at: https://pubmed.ncbi.nlm.nih.gov/28935634/
- Takahashi, N., Nyvad, B. "The role of bacteria in the caries process: ecological perspectives." J Dent Res. 2011; 90(3): 294-303. Available at: https://pubmed.ncbi.nlm.nih.gov/20924088/
