Do You Still Need Antibiotics Before the Dentist If You Have a Knee or Hip Replacement?
If you have an artificial knee or hip, you may have been told that you need to take antibiotics before having your teeth cleaned or undergoing certain dental procedures.
For years, many joint replacement patients routinely took an antibiotic before visiting the dentist. The reasoning seemed straightforward: bacteria from the mouth could enter the bloodstream during dental treatment, potentially travel to an artificial joint and cause a serious infection.
But recommendations have changed…
Today, most people with artificial knees and hips do not automatically need antibiotics before routine dental treatment simply because they have a joint replacement. So, what changed? And if you have a knee or hip replacement, how do you know what you should do before your next dental appointment? At Adam Brown DDS in Monroe, NC, we think this is an important question for patients to understand.
Why Were Joint Replacement Patients Told to Take Antibiotics Before Dental Work?
The concern centers on something called bacteremia, which simply means bacteria are present in the bloodstream.
Your mouth contains hundreds of species of bacteria. Certain dental procedures, particularly those involving the gums, can temporarily allow some of those bacteria to enter your bloodstream. In fact, temporary bacteremia isn’t unique to dental treatment. Everyday activities such as brushing, flossing and chewing can also introduce oral bacteria into the bloodstream. For someone with an artificial joint, doctors historically worried that bacteria circulating through the bloodstream might attach to the joint implant and cause an infection. An infection involving an artificial joint, known as a prosthetic joint infection, can be a serious medical problem. Treatment may require prolonged antibiotics and, in some cases, additional surgery. Understandably, doctors and dentists wanted to prevent that from happening. For many years, prescribing a dose of antibiotics before dental treatment seemed like a reasonable precaution.
Why Have the Recommendations Changed?
As researchers accumulated more evidence, an important question emerged: Do dental procedures actually increase the risk of infection in an artificial joint, and does taking an antibiotic beforehand prevent that infection? The evidence has not demonstrated the benefit that doctors and dentists once hoped antibiotics would provide.
The American Dental Association’s clinical guidance states that, in general, prophylactic antibiotics are not recommended before dental procedures solely to prevent prosthetic joint infection in patients with joint implants.
The American Academy of Orthopaedic Surgeons has also updated its guidance regarding patients with hip and knee replacements. Its review found that routine use of antibiotics before dental procedures may not reduce the risk of a later prosthetic joint infection. In 2026, the American Dental Association further addressed the updated orthopedic guidance and reaffirmed that routine antibiotic prophylaxis generally is not appropriate for immunocompetent patients with prosthetic joints.
In other words, the thinking has shifted from “everyone with an artificial joint should take an antibiotic” to “most patients don’t need one, but individual circumstances matter.”
Why Not Take an Antibiotic Anyway, Just to Be Safe?
It’s easy to think that taking one dose of an antibiotic couldn’t hurt, especially when you’re trying to protect an artificial knee or hip. But unnecessary antibiotic use has risks.
- Antibiotics can cause allergic reactions and other side effects.
- They can also disrupt the normal bacteria in the body and, in some circumstances, contribute to potentially serious infections such as C. difficile.
- There is also a much larger public health concern: antibiotic resistance. The more frequently antibiotics are used unnecessarily, the greater the opportunity for bacteria to develop resistance to them. That can make antibiotics less effective when they’re truly needed.
Modern antibiotic stewardship therefore isn’t about avoiding antibiotics. It’s about using them when the expected benefit justifies the risk.
Does This Mean Nobody With a Joint Replacement Needs Antibiotics Before the Dentist?
No. This is where an important distinction can get lost when people read simplified medical advice online. The recommendation is not that antibiotics should never be used. It is that they generally should not be prescribed routinely to every patient simply because that person has an artificial joint.
There may be circumstances in which a patient’s medical history, joint replacement history or other health considerations warrant additional precautions. For example, the ADA advises that patients who have experienced complications associated with their joint replacement and are having dental procedures involving manipulation of the gums or an incision into oral tissue may require consultation among the patient, dentist and orthopedic surgeon. If antibiotic prophylaxis is considered necessary because of an orthopedic condition, the ADA recommends that the orthopedic surgeon determine the appropriate antibiotic regimen and, when reasonable, provide the prescription.
What If My Orthopedic Surgeon Told Me I Need Antibiotics?
Tell your dentist. Patients shouldn’t have to decide for themselves which medical professional’s advice to follow. Recommendations can vary because every patient’s health history is different. Your dentist needs to know about your joint replacement, when the surgery occurred, whether you’ve experienced complications and what your orthopedic surgeon has recommended. If there is a question about whether antibiotics are appropriate, your dentist and orthopedic provider can determine the best approach based on your individual circumstances.
Don’t stop taking a medication prescribed by your physician or change your premedication routine based solely on something you’ve read online.
What If I Recently Had My Knee or Hip Replaced?
Antibiotics aren’t the only consideration after joint replacement surgery. Timing can matter, too. The American Academy of Orthopaedic Surgeons has issued guidance regarding the timing of dental procedures before and after total knee and hip replacement surgery. For example, many dental procedures may need to be postponed for a period following joint replacement surgery. The appropriate timing depends partly on the type of dental procedure being performed and the patient’s circumstances.
That’s another reason to tell your dental office if you’ve recently undergone joint replacement surgery, even if you’re simply scheduling a routine appointment. Whenever possible, patients planning an elective hip or knee replacement should also discuss upcoming dental needs with their dentist and orthopedic surgeon before surgery.
What About Shoulder Replacements and Other Artificial Joints?
This is an area where patients should be particularly careful about applying general information found online to their own situation. Much of the current evidence and the latest orthopedic clinical guidelines specifically address total knee and total hip replacements. There is considerably less evidence regarding dental treatment and other orthopedic implants, including some other types of artificial joints. If you have a shoulder replacement or another orthopedic implant, tell your dentist what type of implant you have and discuss any recommendations you’ve received from your surgeon.
Your Dentist Needs to Know About More Than Your Teeth
One of the reasons your dental office asks about changes to your medical history is that your oral health and overall health aren’t separate from one another. A new knee or hip may not seem relevant when you’re sitting in the dental chair, but it’s important information for your dentist to have. When you visit Adam Brown DDS in Monroe, NC, let us know if you’ve recently had joint replacement surgery, if you’ve experienced complications with an artificial joint or if your orthopedic surgeon has given you specific instructions regarding dental treatment. Also make sure your dental team has an up-to-date list of your medications and any significant changes in your health.
The Bottom Line: Don’t Automatically Assume You Need Antibiotics
If you’ve been taking antibiotics before every dental appointment because of an artificial knee or hip, don’t be surprised if the recommendations you hear today are different from what you were told years ago. Medical and dental recommendations evolve as better evidence becomes available. Current guidance does not recommend routine preventive antibiotics before dental procedures for most patients simply because they have an artificial knee or hip. But that doesn’t mean the answer is identical for every patient. Your medical history, the type and timing of your joint replacement, previous complications and the dental treatment you’re having can all be part of the decision. If you have an artificial joint and aren’t sure what you should do before your next dental appointment, talk with your dentist and, when appropriate, your orthopedic surgeon.
At Adam Brown DDS in Monroe, NC, we’ll be happy to review your medical history with you and help determine whether any additional coordination with your medical providers is appropriate before dental treatment.
This article is intended for general educational information and is not a substitute for individualized medical or dental advice. Do not begin, discontinue or change prescribed antibiotic treatment without consulting the appropriate healthcare provider.