NBDE Review Questions: Quiz 415 January 5, 2016 by Hassan Shah Leave a Comment In human periodontal disease, which of the following is characteristic of supragingival plaque but not subgingival plaque? A. Motile bacteria are predominant. B. Spirochetes are evident microscopically. C. Gram-negative bacteria are predominant. D. Dietary sugar consumption alters bacterial composition. Δ
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