How much longer do you think I need braces? How much longer will it take to straighten out my teeth? (Photos)

I've had braces for about 9 months and i realize my teeth still have some work to do, but they're getting there. i just want an estimate of how much longer it will take to straighten them. I also noticed that my left front tooth on the top sticks out for some reason..my orthodontist said the braces will "push" it back in, but how long will that take? my smile looks a bit weird with that one tooth sticking out. All of my other teeth seem to be pretty straight/making progress.

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