My mother's (39 yrs) teeth is decaying one after another..she has severe toothache since 4 yrs followed with tooth decay n its breakage ...the teeth decays from between not from the root so it doesnt pain and mouth smells too...she keeps good oral hygein then why is it happining to her ...now all the teeth has slight yellow circle on the top of the teeth i am afraid that all of them will break soon if we dont do anything now...Pls suggest her something so that she can save her remaining teeth(4-5 have decayed and broken) ...she went to dentist but he doesnt seem to take things seriously ...pls suggest some effective homemade remedy