If you leave the plaque and tartar on the teeth without fixing the fundamental problem (immune health) then there of course will not be better health outcomes.
Caries are a sign of an immune disorder or imbalance. As long as dentists only scrape peoples teeth and do not integrate their health into their practice you will keep having plaques and tartar to be remove as your body fight this battle.
https://www.lupus.org/news/people-with-lupus-exhibit-increas...