Normal Oral Flora and the Oral Ecosystem

Area of Science:

• Oral microbiology
• Microbial ecology
• Host-microbe interactions

Background:

• The oral ecosystem is a complex environment including the oral microbiome, anatomical niches, and saliva.
• The oral microbiome consists of bacteria, archaea, fungi, protozoa, and viruses.
• These microorganisms exist as planktonic organisms in saliva or as biofilms on oral surfaces.

Purpose of the Study:

• To define the composition and state of the oral microbiome.
• To highlight the significance of oral microbiome homeostasis for maintaining oral health.
• To identify dysbiosis as a key factor in the initiation of oral diseases.

Main Methods:

• Review of existing literature on oral microbiome composition and function.
• Analysis of the relationship between oral microbiome states (homeostasis vs. dysbiosis) and oral health outcomes.
• Identification of key microbial players and environmental factors in the oral cavity.

Main Results:

• The oral microbiome comprises diverse microorganisms, including bacteria, fungi, and viruses.
• Oral microbiome exists in both planktonic and biofilm states within the oral cavity.
• Homeostasis of the plaque biofilm is essential for oral health, while dysbiosis initiates oral diseases.

Conclusions:

• The oral microbiome's composition and state are critical determinants of oral health.
• Imbalances in the oral microbiome (dysbiosis) are directly linked to the development of major oral diseases.
• Understanding oral microbiome dynamics is key to preventing and treating oral pathologies.