How can oral biofilms influence systemic health, specifically endocarditis risk?

• A. They have no systemic effect.
• B. Bacteremia from oral biofilms can seed cardiac valves, contributing to infective endocarditis in susceptible individuals.
• C. They cause systemic bone loss.
• D. They primarily affect the nervous system.

Answer: (B)

Oral biofilms can influence systemic health through transient bacteremia. Bacteria from dental plaque can enter the bloodstream during daily activities like brushing or flossing, or during dental procedures, especially when gums are inflamed. In people with susceptible heart valves or prior heart conditions, these circulating oral bacteria can adhere to damaged valvular surfaces or areas of disturbed blood flow, form vegetations, and cause infective endocarditis. Viridans group streptococci and other oral flora are classic culprits in this process. Maintaining good oral health and recognizing high-risk individuals helps reduce this endocarditis risk. The idea that bacteremia from oral biofilms seeds cardiac valves and leads to endocarditis best explains the systemic impact. The other notions—no systemic effect, causing systemic bone loss, or primarily affecting the nervous system—don’t fit this mechanism.