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32 Cards in this Set

  • Front
  • Back
Types of soft dental deposits
acquired pellicle
microbial plaque
materia alba
food debris
acquired pellicle
thin protein film. derived supragingivally from saliva and subgingivally from gingival sulcus fluid. It is ACELLULAR and reforms in minutes after removal
Characteristics of pellicle
protective barrier against acids, lubrication, nidus for bacteria, mode for calculus attatchment
dense, organized, non calcified. Adhere firmly to acquired pellicle. It reforms daily.
Only way biofilm can be removed
The basic steps of plaque formation
1. pellicle formation
2. bacterial colonization
3. plaque maturation
composition of plaque
80% water and 20% organic and inorganic solids

of the solis 70% is MO and 30% is intercellular matrix
What composes intercellular matrix of plaque
Ca and P and flouride
what composes organic elements of plaque
Carbs made from sucrose, proteins, and lipids
pathogenic effects of bacterial plaque (biofilm)
1. cariogenic
2. periodontal disease
3. calculoenic
caries formation
cariogenic food
acid formation
ways to detect bacterial plaque
1. direct vision
2. explorer
3. disclosing agent
4. gingival color change
material alba
visible soft mix of salivary proteins, bacterial and epithelial cells. Loosely attached to plaque, or tooth surface. It can coome off with forceful water spray
Where is food debris retained?
anantomy of tooth
open contacts
hard dental deposits
what alwyas covers calculas
formation of calculus
1. pellicle formation
2. plaque formation and matureatin
3 mineralization
mechanism of mineralization
same for supra and subgingival but they mineralize seperately.
rate of calculus formation
12 days
but can begin within 24-48 hours!!!!!
What seperates calculus layers?
seperated by a pellicle and the outer layer is covered by plaque
source of supragingival calculus
color of supragingival calculus
white, creamy yellow

very bulky, moderatley hard
radiograph of supragingival calculus
very dense visbile causes a calculus bridge
source of subgingival calculus
gingival sulcular flid and inflammatiory exudate
color of subgingival calculus
light or dark brown, greeen, or black. stain is due to blood pigments
what is hard subgingival or supragingivla calculus?
Radiograph of subgingival calculus
can see it interproximally
composition of calculus
75-85% inorganic
Ca, P, carbonate, Na, Mg, K, crystals which is 2/3 of the inorgainic material
organic portion of calculas
microbes, wbcs, epithelial cells, and salivary mucins
does calculus cause pocket?
NO calculus is the result of pockets. plaque causes pocket
calculus detection
visulual with air
gingival color change
purpose of plaque index
1. help recoginize oral problem
2. revel degree of oral hygiene effectiveness
3. motivate pt to eliminate disease
4. evaluate success over a period of time by comparison
5. make pt own his/her disease