Bacterial Plaque - Jordan University of Science and … · Bacterial Plaque. Bacterial Plaque •It...
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Bacterial Plaque
By
Ms. Zain Malkawi, MSDH
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• Dense, noncalcified, highly organized bacterial
mass
• Firmly adherent to the teeth or other hard
materials within the mouth
Bacterial Plaque
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Bacterial Plaque
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• It can be formed on oral appliances and
restorations
• Cannot be washed off by salivary or water
flow
Bacterial Plaque
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Categories of Bacterial Plaque
• 1. Supragingival
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• 2. Subgingival
Categories of Bacterial Plaque
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• Not clinically visible
• Using the disclosing agent as a means of plaque
detection
• It becomes visible by its mass and discoloration
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• Plaque can be removed by mechanical cleaning (Daily Removal) at the following areas:
Supragingivally and subgingivally
Around the gingival third of the tooth
Interproximal areas
Tongue
• Plaque may be deposited on a cleaned tooth surface within 6 hours
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Stages in the Formation of Plaque
1. Formation of a Pellicle: selective adsorption of protein components from the saliva
2. Bacteria attached to the pellicle
3. Bacterial multiplication
4. Plaque growth and maturation
5. Matrix formation
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Structures and Composition of Bacterial
Plaque
• Water (80 %)
• Solids (20%: of which 95 % bacterial)
• Different organisms may be found in plaque
• Extracellular microbial products
• Saliva and immunoglobulins
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Factors Influencing Plaque Accumulation
• Crowded Teeth
• Rough Surfaces
• Difficult to Clean
• Out of Occlusion
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Significance of Bacterial Plaque
• Play a major role in initiating and
progression of both:
Dental caries
Periodontal diseases
• Plaque is significant in forming a
dental calculus
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Dental Calculus
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• The longer plaque remains on the tooth surface, the
more types of microorganisms will be present until
the plaque reaches maturity in a few days
• Bacterial plaque is the principle etiological agent of
inflammatory periodontal diseases
• The accumulation of bacterial plaque on the teeth
and tongue will contribute to an unpleasant personal
esthetic appearance as well as to halitosis
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