I'm so sorry to hear about your frustrations with bad breath. I've had many patients seek treatment for bad breath at my practice and I know how distressing it can be, especially when you have tried "everything".
From my experience, for someone who has been cleared from any form of dental disease, the cause of the bad breath can be ENT-related.
I would advise you to seek an opinion from an ENT surgeon, and possibly a second opinion from another dentist just to be sure that your first dentist didn't miss anything.
Dr Marlene's article is very useful, and I also agree with Dr Jaclyn's pointers.
I wish you all the best in finding a solution to your problem!
Kind Regards,
Dr Gerald Tan
