I had my teeth cleaned today and had a shock when the dentist said my teeth were in bad shape. I go every 6 months and went in June and they were in great shape. In August I noticed my teeth looked as though they were all outlined in brown. I drink very little coffee. The dentist said they were not only outlined in brown but the top of the upper part of the teeth had brown outlines over the wavy parts as well. They said I also had terrible plaque when there was very little in less than 6 months ago. I was on a very low dose of antibiotics for over a year but quit taking them about 8 months ago.
Thanks for your query, I have gone through your query. The Chat Doctor.  The plaque or calculus gets Accumulated because of improper brushing habits or MAL aligned teeth which makes difficulty during brushing teeth. Consult your oral physician and get your teeth cleaned at least once in 8 months. Do saline gargling. Rinse your mouth soon after eating anything. I hope my answer will help you. Take care.