Question 371 · LDEK · Etiology and pathogenesis of caries
Indicate the true statements concerning dental plaque:
1) pellicle, bacteria free organic film, is the first stage of dental plaque formation;
2) Streptococcus salivarius is the first bacteria to inhabit the newborn’s oral cavity;
3) at the early stage of plaque formation aerobic bacteria are present but more anaerobic species appear as the plaque matures;
4) “corn cobs” are mostly made of Staphylococcus and Streptococcus;
5) the growth of plaque is a random accumulation of bacteria and their products.
The correct answer is:
2) Streptococcus salivarius is the first bacteria to inhabit the newborn’s oral cavity;
3) at the early stage of plaque formation aerobic bacteria are present but more anaerobic species appear as the plaque matures;
4) “corn cobs” are mostly made of Staphylococcus and Streptococcus;
5) the growth of plaque is a random accumulation of bacteria and their products.
The correct answer is:
- A. 1,2,3.
- B. 2,4,5.
- C. 1,4,5.
- D. 2,3,5.
- E. 1,3,4.
Hint
Remember that plaque develops in an ordered succession, and recall what kind of bacterium forms the core of corn-cob formations.
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