My dentist requires it! I don’t even have to remember. In the past, if I have forgotten, the dentist has it in house. And yes, I have to take it forever before dental work. I would follow the advice of your dentist as this is their field. I take antibiotics all the time because of the infection. It has not been decided as to whether or not this is forever. And, no, dental work did not cause the infection. I had cellulitis in my chin and the infection eventually traveled to my knee and the hardware. My own opinion is that when I went to the ER because of the cellulitis, as I had a small open sore in my chin, I also picked up the other infection.
I have been to the dentist twice since the infection and before the last 2 surgeries, I took the extra antibiotic and had no problems. I will add that my husband had a shunt in his head and he was required to take the antibiotics.
Perhaps your dentist and your physician could have a conversation and come up with the best plan for you. Thank you for asking and best wishes to you!