Just a suggestion and not medical advice.. try oil pulling. Basically swish sesame seed oil (15-20ml) in your mouth for 12-15min, until you can tell the consistency has changed. Then swish with warm salted water (more salt the better) and then brush your teeth as normal immediately. Remember to spit the oil into the toilet bowl and not the sink, to prevent clogging. You should see significant difference by the 2nd time (daily task) you do it. Previously did annual teeth cleaning, haven't gone for a decade now...