A patient with a history of rheumatic fever who now has a prosthetic mitral valve presents for dental treatment. What is the most important consideration for this patient's dental management?

Correct answer: B. Some dental procedures will require antibiotic prophylaxis

• A. INCORRECT. Rheumatic fever can lead to rheumatic heart disease (valve damage), but it does not cause rheumatoid arthritis, which is an autoimmune inflammatory arthritis of joints. These are distinct conditions.
• B. CORRECT. A patient with a prosthetic heart valve (mechanical or bioprosthetic mitral valve) is in the highest-risk category for infective endocarditis per AHA guidelines. Antibiotic prophylaxis is required before certain dental procedures that involve manipulation of gingival tissue, the periapical region of teeth, or perforation of the oral mucosa (e.g., extractions, periodontal procedures, implant placement). The standard prophylaxis is amoxicillin 2g (or appropriate alternatives for penicillin-allergic patients) 30–60 minutes before the procedure.
• C. INCORRECT. Dental treatment is not contraindicated for patients with prosthetic valves. Appropriate precautions (antibiotic prophylaxis, medical consultation) allow safe treatment.
• D. INCORRECT. Corticosteroid premedication is indicated in patients with adrenal insufficiency (on chronic steroid therapy) who may experience adrenal crisis under stress — not for patients with prosthetic valves.