I think everyone of my teeth have at least one filling. I have also had teeth pulled including baby teeth because they got so bad. In addition to the cavities my teeth have a gray tinge to them thanks to the fine antibiotic, Tetracycalin, from years ago. I am sure, in addition, all the nebs & other meds plus acid etc does a number. I also think Genetics adds to my mix. Both of my parents had very bath teeth. My Mom got dentures at a very young age.