And by perfect I mean no fillings or pain, not how white or straight they are.
I know of a woman with two children in her forties with no fillings.
I was very proud of my teeth but got a surface filling at 29 when pregnant with my 3rd child (relevant because pregnancy can weaken your teeth), and at 31 i have been told that I have brushed my teeth so hard that I now have receding gums causing me daily pain (particularly on the tooth that had the surface filling), so the nerve is now almost showing and anything that touches it is sore.
I just guess I wanted to know if everyone else had great teeth and I was going to end up being the only woman my age with their teeth falling out or actually it's pretty standard for your teeth to go downhill when you are over 30?