If you have dental decay and dental plaque, I would clean more often, using natural substances of course.
Some Traditional Factors that Promote Dental Health:
(The basics are sunlight + liver/greens + fat + bones)
• Sunlight (D3)
• Raw fermented cod liver oil (A and D3); if you don’t get much sunlight you’ll probably want to add some Carlson’s D3 fat-containing gels (alternatively, use a dry D3 supplement and try taking fish oil with it for absorption)
• Pastured liver and liver-containing foods, like bug/worm-fed poultry eggs, shellfish and other whole fish (A, D3, MK4-K2)
• Edible bones, like soft raw bones, dried or low&slow-cooked until soft, or simmered into a broth (calcium, phosphorous, magnesium, silicon); also insects, lizards, bird embryos (balut), small birds, rodents, and other small critters with bones and bonelike structures (calcium--there's some of the missing calcium among peoples that don't eat dairy)
• Raw, young greens and brassica (K1, magnesium, calcium) with fat for absorption (mature, tough and bitter green veggies should be fermented, steamed, simmered or quickly chowed to neutralize antinutrients and make the nutrients more digestible)
• Raw pastured butter (MK-4 K2)
• Probiotic foods and fermented foods reported to promote healthy gut flora (which help with absorption of fat-soluble nutrients--A, D3, MK-4 K2), such as high meat, fermented fish, unsalted fermented raw vegetables like sauerkraut and nightshade-free kimchi
• Raw animal fats to help absorb the fat soluble nutrients (A, D3, MK-4 K2) and soothe the gut
• Kelp and other seaweed (K1, calcium, magnesium)
• Fatty fish (like herring, sardines and salmon) and the meat, blood, organs (see above), fat and bones (see above) of grassfed cattle raised outdoors on mineral-rich pastures or fed mineral supplements (A, D3, MK-4 K2, calcium, phosphorous, magnesium, silicon)
• Fatty fruits (like coconut and avocado) to help with absorption of fat soluble nutrients (A, D3, MK-4 K2, K1), if digested well
Did you notice that most of these factors are found in the traditional diet and lifestyle of coastal Arctic hunter-gatherers like coastal Inuit and Chukchi? I don’t think it’s coincidence that traditional Inuit were found to have the highest jaw strength of any people measured. There are probably other factors too, like the fact that traditional Arctic peoples used their teeth to tear, chew and soften/work skins, hides and frozen meats and ate more of their meats and fish raw than most peoples.
Also recall the gleaming white fangs of the wild wolf for whom dental caries are a rarity (and when they occur I read that they tend to self-heal--amazing!...sorry, I lost the reference, but learning about wolves and other wild facultative and obligate carnivores is highly recommended) and think about what the wolf eats.
I probably missed some foods and nutrients. I hope I remembered the basics.