S.R.
Trust the dentist's advice. In my case one of my molars is totally out of line with the others because my adult tooth was growing behind my "baby" tooth and my baby tooth did not fall out! It was eventually removed by a dentist when I was around age 14 but by then the damage had been done. I'm 42 years old now and I find the "out of line" tooth to be annoying as food often gets trapped there. Luckily, though, it's far enough back in my mouth that I'm the only one aware of the defect. I think that the adult tooth needs to be growing in the right place in order to push the baby tooth out. Good luck either way! :)