37 and no cavities.
I have a mouth full of fillings all put in before I was 16. My dentist went to the School of Preemptive stikes and put fillings in places most people will get cavities.
Not quite 30 yet. 28 in April and no cavities.
I do have several fillings and root canals which will be needing crowns eventually, but those were as a result of broken teeth from an accident, not from dental disease.