We've had Tucker's teeth cleaned, and plan on doing it every year, but in the mean time, we've found some dental wipes that we're trying out on both the the chi's (yes, we adopted a 2nd little guy who needed a home). They have some peroxide in them; I forget what else. My shy guy puts up with the wipes better than the fingertoothbrush, which I guess is more invasive for him. The wipes were inexpensive, Arky, and easy to use. Maybe you want to just do a wipe down every few days to stave off further decay and maybe clean up their teeth a bit.
The vet recommended Eukanuba dog food for dental health, but frankly, I don't like the scores eukanuba gets for nutritional content and Tucker's coat and eye stains are much better on Merrick, so I'm back using that again after a couple of bags of Euk.
And Roman, thank you for the kind words. The dogs give me so much more than I give them. I am really the lucky one.