How long should one typically be on antibiotics after they get Gore-Tex jaw angle implants?

I was curious how long one should typically be on antibiotics after they get jaw angle implants. My surgeon gave me 21 antibiotics but I was told to take them starting the day before surgery. So I was only on them 3 days PO and j ended up developing an infection. I'm really upset as I made sure my oral care was very strict. Was this a mistake on their end?