i do have cavities on back of my lower jaws; however, it's not due to RO water. should RO water is causing this, the damage distribution should be uniform -> my

i do have cavities on back of my lower jaws; however, it's not due to RO water. should RO water is causing this, the damage distribution should be uniform -> my other teeth should be equally damaged. i still have other teeth intact, no holes, despite using ro water for 8 years or so. i think there's the cause of my holes. i had wisdom teeth very late in age. my brushing pattern wasn't sufficient. moreover, i was addicted to oatmeal power drink and didn't brush after. those sugary flakes seem to linger on my back jaws. yudkin book, "pure, white and deadly" discusses this. children who drink sugary vs eating candies. same sugar; however, those eating candies get more cavities simply because candies stick between teeth ... think twinkies on interesting part of the book is about the slave in sugar plantations. they did eat raw sugar; however, the slaves didn't get the same disastrous level of disease as the masters, who eat refined sugar.