Hi I will beat this,
I can concur, I get great after effect from getting a general clean up with the dentist and also suspect there is some kind of link to which you are referring.
I also , just posted about OVEX threadworm/parasite treatment , this helps and I think there are links with both of these things.
I am not a Dr, but these two things assist very positively.
I have a host of natural mouthwashes i lean towards , I have seen threads on candida being a potential cause too, and bucket all these things together as having some part in the picture.