I have strong teeth, but they don't come in where they are supposed to. I had my permanent teeth come in behind my baby teeth, so the roots never dissolved and they never got loose and fell out, so the dentist had to pull them all out. I've actually only had 2 loose teeth ever. I also had an extra tooth (so I could have looked like that picture up there without medical intervention) that the dentist pulled. My wisdom teeth have started coming in this past year and actually have been quite painless. I should probably have them pulled but haven't gotten around to it yet.