Periodontal Disease M3 Flashcards
Plaque is composed of bacteria, which is a sticky…
Polysaccharide Matrix
What is plaque made up of?
70% micro-organisms and 30% inter bacterial substance
How long does it take for new plaque to form?
A few hours
How long does it take for for the salivary pellicle to become invaded with gram positive cocci (streptococcus)?
3-8 hours
How long does it take for plaque to become visible?
24 hours
After 3 days of plaque formation what bacterias can be found?
Spirochaete and Fusiform
What is a gram-positive bacteria?
Cocci
What is a gram-negative bacteria?
Spirochaete and Fusiform
What is one of the most important staining methods?
Grams method
What colour is Gram-positive?
Blue stain
What colour is Gram-negative?
Red stain
When the dental pellicle forms on the tooth and provides bacteria surface to attach, which step of plaque formation is it?
Association
Within hours of the first plaque formation, bacteria will loosely bind to the pellicle, what step of plaque formation is this?
Adhesion
Bacteria will spread throughout the mouth and begin to multiply. What plaque formation step is this?
Proliferation
Microcolonies are formed. Steptococci secrete a protective layer (slime layer). What step in plaque formation is this?
Microcolonies
Microcolonies form a complex groups with metabolic advantages. What step in plaque formation is this?
Biofilm formation
The biofilm develops a primitive circulatory system. What step in plaque formation is this?
Growth or maturation
When plaque hardens and calcifies it is called…
Calculus (Tartar)
What is Extrinsic staining?
Staining on the surface of the tooth
What is Intrinsic staining?
Staining within the structure of the tooth
What time of Gram staining is present in periodontal disease?
Gram-negative
How long does plaque need to be on the teeth before it causes gingivitis?
7-14 days
A probe with a ball-end (0.5mm) and a colour coded end (3.5mm-5.5mm) is called…
CPITN probe
Adult Periodontitis, has been replaced with what term?
Chronic Periodontitis
