Oral factors that influence bacterial growth
Salivary pH, oral cavity temperature and endogenous nutritional input are some of the key determinants for bacterial growth.

Oral factors that influence bacterial growth

Factors that regulate the composition, development, amount, coexistence and distribution of oral microorganisms on surfaces of the oral cavity (primary ecosystems) are known as environmental determinants. There

Bacterial diversity and interactions
Some 700 bacterial species can colonise the oral cavity, of which 400 can be found in subgingival biofilms

Bacterial diversity and interactions

Bacterial diversity of the oral cavity

The primary colonisers are mainly gram-positive bacteria – cocci and bacilli – which bind to salivary protein antigens, by specificity of

Biofilm formation is a survival strategy for bacteria, because it gives them certain advantages over planktonic bacteria: communication (quorum sensing), resistance and the ability to adapt

Properties of oral biofilms

In oligotrophic environments (lack of nutrients), most bacteria (and some fungi) leave their state of individual planktonic cells to grow as biofilms, forming colonies embedded in a

Biofilm formation is a survival strategy for bacteria, as it gives them the capability for adaptation, communication and resistance.

Oral biofilm formation

Oral biofilm has pathogenic potential and its presence is associated with the development of caries, gingivitis, periodontal disease, peri-implant mucositis and peri-implantitis.

The process of oral biofilm

Oral Biofilm
The concept of dental plaque has evolved to become oral biofilm: groups of bacteria in matrices that bind to surfaces. This is a key factor.


Bacteria in the oral cavity are either found in suspension in saliva (planktonic bacteria) or forming a film which binds to the different oral tissues including tooth