Dear fellow Seniors, can you fill me in on a Medicare question?

[Paper Roses]

I have Medicare Preferred and a supplement with Tufts. My question involves Dental coverage.
I have drug coverage but want to sign up for Dental if it provides for more than my current policy. I can get fillings and cleanings covered(w/copay) but:

I Googled "what does Medicare Dental Coverage cover". Of course, I got every dental provider as I scrolled down. When I got to the official Medicare page, it would not let me in unless I agreed to all kinds of things that I don't want to agree to.

Do any of you have Medicare Dental coverage and what the heck does it cover.
It is interesting what the government wants you to agree to.
Sign up is in a few days and I really need to see if the coverage is worth the cost.
Thanks,
PR