If you are planning on doing Rocco's neuter in the next few months I don't see any reason to worry. Bogey is from a shelter and had a retained canine tooth that was removed during his neuter and he was over a year old. Other then having stinky breath when I first brought him home his bite is perfect.
Pebbles had her spay and they removed 2 teeth. I was expecting her to have one retained tooth (canine) removed and just happened to notice the day she was going in that she had a retained front tooth. She has a gap right in the front
but to tell you the truth no one except me even could tell.