Is it possible for me to get scar revision surgery on a scar that I've had for 4+ years? (Photos)

I had a poor tooth job done. Instead of getting a root canal done, I only got a filling done. Meaning the bacteria that I had, was only covered up instead of being removed. Bcuz of this, the bacteria found a way out making a hole under neath my jawline. The pain was unbearable. For years I had pus and liquid coming out of this hole. I got my tooth taken care of but this scar is still there.

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