Which statement about antibiotic prophylaxis is true?

• A. Antibiotic prophylaxis is recommended for all implants.
• B. Prophylaxis is only for prosthetic cardiac valves.
• C. Prophylaxis not recommended for prosthetic joint implants.
• D. Prophylaxis never used in patients with prior IE.

Answer: (C)

Prophylaxis around dental procedures is aimed at preventing infections like infective endocarditis in people with certain heart conditions, not to blanket-protect implants. For prosthetic joint implants, routine antibiotic prophylaxis is not recommended because the evidence doesn’t show a meaningful reduction in joint infections from dental-induced bacteremia, and the risks of antibiotics (allergic reactions, side effects, antibiotic resistance) often outweigh any tiny potential benefit. In contrast, there are specific cardiac conditions where prophylaxis is advised (for example, a history of infective endocarditis or certain complex heart defects), which is why the statement about prosthetic joint implants being the area where prophylaxis isn’t recommended is the best choice. The other options imply universal protection for all implants, limit prophylaxis to cardiac valves only, or suggest never giving prophylaxis to those with prior endocarditis, none of which align with current understanding.