Micro & Immunology · single question
Which bacteria is responsible for CORONAL caries vs ROOT SURFACE caries?
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Correct answer: B. Coronal: Streptococcus mutans; Root: Actinomyces viscosus
✓ B) Coronal = S. mutans; Root = Actinomyces viscosus (A. naeslundii).
Caries microbiology: CORONAL caries initiation: Streptococcus mutans (highly acidogenic and aciduric, adheres to smooth enamel via glucan synthesis). DENTINAL caries progression: Lactobacillus acidophilus (advances lesion deeper). ROOT SURFACE caries: Actinomyces viscosus and A. naeslundii — thrive in the gingival environment, produce acids at lower acidogenic levels, prefer the less mineralized cementum. A. viscosus is THE most commonly associated organism with root/cervical caries. This distinction is frequently tested on INBDE.
Caries microbiology: CORONAL caries initiation: Streptococcus mutans (highly acidogenic and aciduric, adheres to smooth enamel via glucan synthesis). DENTINAL caries progression: Lactobacillus acidophilus (advances lesion deeper). ROOT SURFACE caries: Actinomyces viscosus and A. naeslundii — thrive in the gingival environment, produce acids at lower acidogenic levels, prefer the less mineralized cementum. A. viscosus is THE most commonly associated organism with root/cervical caries. This distinction is frequently tested on INBDE.
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