“Knee replacement?”

The best answer to that is to ask your orthopedic surgeon. Many doctors are saying that extended need for antibiotic prophylaxis is not required after a certain period of time. Again, the best thing to do is to ask your doctor.

It all depends on the Orthopedic surgeon.
The paradigm is shifting to no prophylaxis but ultimately it’s the surgeons call.

After about 2 years, and no unusual complications, you are probably sfe to discontinue the antibiotics, but check with your orthopedic surgeon to be safe.

In 2017 The dental association and the orthopedic association met and hammered out new guidelines. In all cases of use your orthopedic or Primary Care Provider (PCP) is controlling, ie, they decide on your course of antibiotic treatment if needed. The standard now in dentistry (circa 2022) is that NO antibiotic therapy is required beyond 6 months from implant placement. Your orthopedist may insist on antibiotic therapy beyond six months. Here's the gist of the current regimen: Studies have revealed that more people die from allergic reactions to the antibiotics than die from the complications of joint infections. So the dental association has gone with the odds. Two additional notes: the antibiotic of choice is Keflex (Cephalexin) rather than amoxicillin (but amoxicillin is acceptable); also it is now recommended to dentists that IF the orthopedic surgeon requires antibiotic treatment BEYOND six months that this antibiotic prescription be obtained by the surgeon and NOT the dentist - the reasoning seems to be that the risk of joint infection to patients be diagnosed by their physician and is beyond the realm of the general dentist. This means that when you visit your dentist and have had joint implants in the past and it's beyond 6 months that your dentist should NOT refill your prescription without written notification of your orthopedic surgeon or PCP, and if they require it, THEY must prescribe it and NOT the dentist unless notified otherwise.

I prefer a co-diagnosis approach to anti-biotic use after surgery. I always suggest taking your surgeons recommendation.

It may not be necessary. Your best answer will come from your dentist. I am glad you are caring for your teeth.

Usually, it is 2-5 years after the joint replacement. You can still check with the surgeon who did the joint replacement or you can also check with your primary care physician.

It is not official protocol at this time. Ask your surgeon.

It's usually the knee surgeon's call, I would consult with an orthopedic surgeon for the best answer.

Yes. But just to be safe check with your MD (physician).