رجل عمره ٦٠ سنة عنده صمام أبهري صناعي منذ ٣ سنوات، ويحتاج خلع ضرس ملتهب مع نزف متوقع من اللثة. ليس عنده حساسية من البنسلين، والعلامات الحيوية طبيعية. ما التعليم الصحيح عن الوقاية من التهاب الشغاف؟

A 60-year-old man with a prosthetic aortic valve for 3 years needs an infected tooth extracted with expected gum bleeding. He has no penicillin allergy and normal vitals. What is the correct teaching about endocarditis prevention?

1. He takes antibiotics only if a fever develops afterwards
2. A salt-water rinse before the procedure is enough
3. He usually needs prophylactic antibiotics before the procedure as prescribed
4. He needs no prophylaxis because teeth do not cause heart infection

Answer: C) He usually needs prophylactic antibiotics before the procedure as prescribed. Prosthetic valves and previous endocarditis are high-risk conditions, so antibiotic prophylaxis is given before dental procedures that make the gums bleed. Good daily oral hygiene also matters.