Subgingival Calculus Is Always Covered with Dental Plaque Biofilm

Subgingival calculus is always covered with dental plaque biofilm.The presence of subgingival calculus and plaque biofilm causes greater progression of periodontal disease than plaque biofilm alone.

A) Both statements are TRUE.
B) Both statements are FALSE.
C) The first statement is TRUE, and the second statement is FALSE.
D) The first statement is FALSE, and the second statement is TRUE.

Correct Answer:

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