Dental Plaque Types and Locations

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What is the composition of dental plaque?

Microorganisms attached to each other and to the tooth surface, embedded, interwoven and surrounded by extracellular material of a triple abiotic origin: bacterial, saliva, and diet

Why is the term 'dental plaque' preferred over 'bacterial plaque'?

Because it includes microorganisms such as viruses, fungi, and protozoa in its content

What are the different types of dental plaque based on location?

Supragingival, subgingival, and root surfaces plaque

Where is supragingival or dentogingival plaque predominantly found?

On the smooth surfaces of the teeth and above the gum line

What is the characteristic feature of smooth surfaces plaque?

It forms on smooth surfaces such as the buccal or buccal and palatal or lingual surfaces of the teeth

Where does fissure plaque form?

On the pits, fissures, and grooves on the occlusal surfaces

What is the primary function of the acquired pellicle in plaque development?

To protect the tooth from decalcification and prevent the penetration of acids.

Which type of plaque is most similar to subgingival plaque in terms of its attachment location?

Root surface plaque

What is the composition of mature plaque?

Bacteria and acellular matrix

Which microorganism is found to increase in caries within mature plaque?

Streptococcus mutans

What is the first step in plaque formation according to the text?

Acquired pellicle formation

Which bacteria are considered pioneer bacteria in primary colonization during plaque development?

Oral streptococci and Actinomyces naeslundii

Which type of plaque becomes thicker as anaerobic areas develop during secondary colonization?

Subgingival plaque

What is the predominant mineral component in calculus or tartar formation?

Hydroxyapatite

Which microorganism is found to increase in periodontitis within mature plaque?

(Aggregatibacter) Actinobacillus actinomycetemcomitans

What provides positive ions (calcium, hydrogen, magnesium) for the union between acquired pellicle and negatively charged bacteria?

Saliva

What is the main function of the floating plaque?

To be located between tooth structures.

What is the primary composition of the acellular matrix in mature plaque?

Inorganic compounds: K, Na, Ca and phosphates etc.

This quiz covers the different types and locations of dental plaque, including subgingival plaque located below the gingival margin and root surface plaque on exposed cementum. Test your knowledge on the characteristics and significance of these plaque formations.

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