Assessing plaque - Supra and subgingival biofilm
3 important questions on Assessing plaque - Supra and subgingival biofilm
What is subgingival biofilm?
What happens in the early stages of gingivitis and periodontitis?
Major influence of supra gingival biofilm on the accumulation and pathogenic bacteria of the sub gingival biofilm
Name the microorganisms in the supragingival flora
Name the microorganisms in the subgingival flora
- gram-positive aerobic bacteria
- streptococci, actinomyces, lactobacillus - candida
Subgingival
- gram-negative - anaerobic bacteria - motile bacteria
- actinomyces, tannerella forsythia, fusobacterium nucleatum
Explain the organization in layers of the subgingival biofilm ![]()
- Initial layer
- actinomyces
- Intermediate layer of spindle-shaped bacteria
- f.nucleatum, tannerella and t.forsythia
- Top layer
- bacteriodes and spirochetes (palisade)
- Attached to pocket epithelium
- gram negative microorganisms
- Invasion of microorganisms in connective tissue
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