I have a permanent retainer on my bottom lower teeth.  I recently went to a new dentist who wants me to have some sort of gum therapy treatment that will be fairly expensive (my insurance doesnt cover it).  He says that the retainer causes bone loss because I cant clean very well down there, so without it I might lose my teeth eventually.  I was not a big fan of this dentist and am looking for a new one, but should I pay attention to what he said about the wire? Should I even keep the wire?  I didnt trust the dentist, but I dont want to lose my teeth.
Thanks for your query, I have gone through your query. The retainer as such will not cause bone loss since it is a passive appliance, what your dentist has told is, the retainer might interfere with the routine cleaning of the teeth. If you fail to clean that are, then the deposits can get accumulated and resort the bone. So nothing to be panic about your retainer. Maintain oral hygiene properly. If any rough surfaces are there over the retainer, you can get it smoothened. I hope my answer will help you, take care.