Oral Environment Flashcards
What are the stages of the oral flora during its lifetime
Pioneer species –> pioneer community –> tooth eruption leading to build up of climax community –> climax community reduces as pt bodes Edentulous
What are a couple of viable streptococci species in babies
S oralis
S salivarius
What are GNABs
Gram negative anaerobic bacteria
What streptococci species arrives in the oral flora after tooth eruption
S mutans
What is the diversity of GNABs like at the gingival margin
Greater diversity
Why is immuno status in relation to Edentulous
The mouth is immune to bacterial growth if back to no teeth as not as many surfaces
What are opportunistic organisms
Bacteria which takes advantage of certain opportunities to cause disease
Can lay dormant
What is the environment like with dentures
Very complex
Many bacterial species
Staphylococci 100% in isolation
What are some factors promoting bacterial. Growth
Warmth of body
Moisture
Nutrients (food, saliva, GCF)
What are some inhibiting factors of microbial growth
Availability of nutrients
Antibacterial factors in saliva
Shedding of epithelia
Swallowing saliva
What are some key factors affecting the spatial and temporal variation
Temperature Redox potential pH Nutrients Adherence Time
How is a high Eh redox potential formed
This is aerobic as
Oxygen oxidises its surroundings therefore the higer the oxygen the higher the redox in terms of the potential
What anaerobes favour a low Eh
Any anaerobes and spirochete which only live at the base of the periodontal pocket
When does th Eh change
During plaque development
Where is pH lower
Carious lesions
Endures fourth of aciduric bacteria such as streptococci
