I got my braces off about a year ago. My teeth were pretty crooked, and I had one of my "4 front teeth" on the bottom extracted, and a side tooth was "moved in" to fix close the gap. During the course of treatment, I noticed my top lip/mouth began to resemble a "monkey mouth" but I thought it was because of the braces. I even wore a retainer for a year after my braces, thinking the protrusion would go away after I stopped having the retainer in.