The tooth is fine, I don't see why everyone else think it's off. It's just a bit... flat. I don't know about everything else, but fixing the torso would make it (more)decent(er). The right breast seems to be resting on a flat surface :/ The arm on the right side[of the drawing] seems out of proportion... Take a look at the upper part of the arm. It seems short. Take a look at your upper arm. See how long it is and where it reaches your torso; what length it is. Compare that to the arm on the girl. Also, the right hand is perfect, but it looks too small. Even though it's at the front it doesn't need that much foreshortening. Make it bigger, maybe? The size of the hand is roughly the size of the face - just a note. Hope that helped a bit ^^ I know it should.