How does dental calculus form and why is it a stable substrate for microbes?

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Prepare for the Microbiology and Immunology 6400 Oral Intermicrobial Interactions Test. Study with engaging materials, flashcards, and multiple-choice questions. Each question offers hints and detailed explanations. Ace your exam today!

Multiple Choice

How does dental calculus form and why is it a stable substrate for microbes?

Explanation:
Calculus forms when dental plaque becomes mineralized as calcium and phosphate from saliva precipitate into the plaque, creating a hard mineralized deposit. That mineralized matrix is rough and porous, which traps bacteria and food particles and provides protected niches. Because it’s mineralized, the surface is adherent to the tooth and resists mechanical clearance, making it a stable scaffold that supports persistent microbial colonization, including diverse bacteria that can thrive on that mineral-rich surface.

Calculus forms when dental plaque becomes mineralized as calcium and phosphate from saliva precipitate into the plaque, creating a hard mineralized deposit. That mineralized matrix is rough and porous, which traps bacteria and food particles and provides protected niches. Because it’s mineralized, the surface is adherent to the tooth and resists mechanical clearance, making it a stable scaffold that supports persistent microbial colonization, including diverse bacteria that can thrive on that mineral-rich surface.

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