Why is antibiotic prophylaxis before dental procedures no longer routinely recommended for patients with prosthetic joints?

Correct answer: C. Studies have failed to demonstrate an association between dental procedures and prosthetic joint infection

• A. ❌ Prosthetic joint infections remain serious — that is not in dispute. What changed is the evidence that dentistry causes them.
• B. ❌ Resistance was not the rationale; the causal link itself was never established.
• C. ✅ CORRECT — The ADA and AAOS reviewed the evidence and found NO demonstrable causal link between dental procedures and late prosthetic joint infection. Weighed against the real harms of prophylaxis — anaphylaxis, C. difficile colitis, antibiotic resistance — routine coverage was no longer justified.
• D. ❌ Antibacterial coatings exist in research but are not the reason the guideline changed.

Note: Current practice: decisions are made in consultation with the orthopedic surgeon for selected high-risk patients (immunocompromised, poorly controlled diabetes, previous joint infection). The bacteremia from daily chewing and brushing dwarfs that from a single dental visit.