About a year ago my doctor offered me a stent, but for whatever reason, I dismissed it. A few months ago, I met a woman on Facebook who had gotten one, and not only did it help her oral pain, it helped her face pain too. So I went back and got one...
A "stent" is a plastic device made from a mold of your mouth, that fits perfectly without being too invasive. Before inserting it, you smear a compound of medications on the inside surface. This delivers meds through the mucous membranes in your mouth, without them getting all over your tongue, lips, etc. There are people that believe that this delivery method is more effective than pills or creams through the skin. (see link for further detail)
A specific compound of meds are made based on your symptoms. The compound is a gel/cream/paste that you apply to your stent periodically and wear throughout the day. So far I am only using Benzocaine and Capsaicin, but ultimately many meds can be added. For me, we might add Neurontin, Amitriptyline, Ketaprofen, Ketamine, Benzocaine, and the Caspsaicin. The other girl I met who had success had nine meds in her compound.
The reason we're hesitating on adding the other meds is because lately I've had a few periods of a few hours with no pain (I never thought I'd get a second free of pain again in my life), my doctor wants to wait and see if this trend continues. If not, we add the additional meds mentioned above.
I've provided a link to an article in the Journal of the American Dental Association (JADA) that has much detail about this, but it is 10 years old. It has a picture of the stent, which is what mine looks like. The other girl I met had one on the roof of her mouth because her pain was facial, whereas mine is just in the teeth (knock on wood).
I only have pain in my teeth, but it has helped me. And the girl who convinced me to get it, she had facial pain and it helped her. It's not a wonder cure, but it's something for those of you with 24/7, burning, aching pain to consider.