For most patients with a hip or knee replacement, routine antibiotic prophylaxis before dental treatment is no longer recommended in Australia. Current Australian therapeutic guidance does not support giving antibiotics before dental procedures purely because a patient has a prosthetic joint.
This is a genuine change from what many patients were told years ago, and it is worth understanding rather than simply accepting, because you will meet people who are certain of the opposite.
Why the advice changed
The old practice rested on a reasonable-sounding idea: dental work releases bacteria into the bloodstream, those bacteria could settle on a prosthetic joint, so cover the patient with antibiotics. The difficulty is that the evidence never demonstrated that this actually prevents joint infections.
Meanwhile the costs of the practice became clearer. Antibiotics carry a risk of allergic reactions, including rare but serious ones, they disturb normal gut flora, and widespread unnecessary use drives antibiotic resistance. When a treatment has not been shown to help and does carry harm, guidance changes. It did.
Everyday activities are also relevant here. Chewing and brushing your teeth release bacteria into the bloodstream too, far more often across a year than an occasional dental appointment does. Good routine dental health matters considerably more than a single dose of antibiotics before a filling.
Where it is different
Guidance sets out circumstances where prophylaxis may still be appropriate, and this is exactly the sort of decision that belongs with your treating team rather than a website. It is worth raising specifically if you have had a previous prosthetic joint infection, if you are significantly immunosuppressed, or if extensive dental treatment is planned.
Your dentist and your GP are both part of this decision. If your dentist proposes antibiotic cover, that is a conversation to have rather than an argument to win.
Treat dental infection promptly, whatever the guidance
This is the part that matters most and it gets lost in the debate about premedication.
An active dental infection, an abscess or untreated advanced gum disease is a genuine source of bacteria in the bloodstream, sustained over weeks rather than the minutes of a dental appointment. If you have a dental infection, get it treated. Do not delay dental treatment because you are worried about your joint replacement. Delay is the greater risk.
Before your surgery
If you are booked for a joint replacement and you know you have dental problems, deal with them beforehand where the timing allows. Any source of infection anywhere in the body is worth addressing before an implant goes in, and that is also true of skin infections, leg ulcers and untreated urinary infections. It is one of the questions asked before surgery is scheduled, and it is asked for this reason. See preparing for your surgery.
If your joint becomes hot, swollen or newly painful
Contact the rooms rather than waiting for your next appointment, particularly if it comes with fevers or follows an infection elsewhere. Prosthetic joint infection is uncommon, and it is far more treatable when it is caught early. This is not a reason for anxiety about every twinge, and it is a reason to make one phone call rather than watch and hope.
Common questions.
Do I need antibiotics before dental work if I have a hip or knee replacement?
For most patients, no. Current Australian therapeutic guidance does not recommend routine antibiotic prophylaxis before dental procedures simply because a patient has a prosthetic joint. The evidence did not show that it prevents joint infection, and antibiotics carry their own risks. Some individual circumstances differ, so discuss it with your surgeon, dentist or GP.
Why did the advice about antibiotics and dental work change?
Because the practice was never shown to prevent prosthetic joint infection, while the harms of unnecessary antibiotics became clearer, including allergic reactions and antibiotic resistance. Everyday chewing and tooth brushing also release bacteria into the bloodstream far more often than occasional dental visits.
Can I have a dental check-up after a joint replacement?
Yes, and you should. Routine dental care and good oral health matter more for protecting your joint than a single dose of antibiotics before an appointment. Do not postpone dental treatment because of your replacement.
Should I get my teeth checked before joint replacement surgery?
If you have known dental problems, it is sensible to have them treated before surgery where the timing allows. An active infection anywhere in the body, including the mouth, skin or urinary tract, is worth addressing before an implant is put in.
What should I do if my replaced joint becomes hot, swollen or newly painful?
Contact the rooms rather than waiting for your next scheduled appointment, especially if you also have fevers or have recently had an infection elsewhere. Prosthetic joint infection is uncommon but is far more treatable when identified early.
This page provides general information about a medical condition and a surgical procedure. It is not individual medical advice and does not replace consultation with a qualified practitioner. Outcomes vary between individuals and all surgery carries risk. A referral is needed for a consultation with Professor Daevyd Rodda; without one, you can start with the practice nurse practitioner, who can provide it.