i had a habit of eating packed sweet supari (betel nut). now i have totally stopped it since last 3 months. i do have marks on the joints of 2 adjoining teeth, on all joints. i do not have a problem of bad odour neither have any history of any kind of tooth problem. i brush regularly with regular flossing n use inter-dental brush as well. but the brown stains still remain. will these stains create any dental trouble for me in future? are these due to my habit of eating betelnut? what all other problems are cause due to this habit of eating betelnut (oral n otherwise also)?