|Short Overview of Bacteria involved in
Dental Plaque, Dental Caries and
|Author: Boban Fidanoski|
Microbial dental plaque is dense non-mineralized complex mass of colonies in a gel-like intermicrobial matrix that adheres firmly to acquired pellicle. Dental plaque may contain microorganisms other than bacteria as mycoplasmas, yeasts, protozoa and viruses. Plaque is formed in three basic steps:
1. Acquired pellicle formation: membranous layer covering the tooth
made of glycoproteins that are formed minutes after tooth plaque and calculus
Days 1-2: Three bacteria involved in early plaque
formation are from Viridans group of Gram positive aerobe Streptococcus
Days 2-4: From gram negative rods in Actinomyces species appear and are the most prevalent in early plaque formation and constitute less than 10% of total viable counts.
Days 4-7: Fusobacteria appear
Weeks 1-2: Gram negative anaerobes Vibrios and Spirochetes and they are associated with gingivitis. It is generally felt that move towards more gram negative anaerobes in plaque is associated with progression of gingivitis and periodontal disease.
If dental plaque is not removed it will play a major role in the initiation and progression of both dental caries and periodontal disease:
Dental Caries: microorganisms associated with caries development
- Prevotella intermedia
author: Boban Fidanoski
January, 2007 Copyright - Text, diagrams, figures and photographs