I think that may differ per surgeon or practice or maybe per patient. I had tkr less than a year ago and my surgeon said no antibiotics needed when I had my teeth cleaned less than 6 months after tkr.

Here is some info about current recommendations from the ADA Guidelines:
The ADA generally recommends against routine antibiotic prophylaxis for prosthetic joint implants before dental procedures.
Surgeon's Role:
If the patient has a history of complications with their joint replacement or other risk factors, the orthopedic surgeon may recommend antibiotics.
Dentist's Role:
The dentist will assess the specific dental procedure and the patient's overall health to determine if antibiotics are needed.