Welcome at HCM.
I have read your question.
It looks from your details that you are having TMJ arthritis
& your doctor has advised for surgery.
There are some other methods by which you may have relief-
-You should avoid eating hard food items.
-Ask about steroid
injection in joint.It is safe in good hands but not a permanent solution.
-Take some joint supplements like glucosamine
with chondroitin sulfate.
-Take a good anti inflammatory analgesic
Hope this all will help you.
Wish you a happy & healthy life.