Hi, This is not that serious as it has been portrayed to you. It can be treated very easily by correction of a few teeth height and interferences .

It may be due to abnormal overactivity of muscles which me be due to clenching ie. Bruxism during night or so which requires night guard or occlusal disbalance so filling n so on Go for it

First you go for better quality night guard,clenching of teeth might be the prime reason for your joint pain. This will cost near about 3k.take a watch period of few months and if it not corrected then go for further treatment plan.

Namaskaram, TMD is the name for a group of conditions that are characterized by pain and dysfunction in the temporomandibular joint (TMJ), where the jaw bone (mandible) meets the temporal bone (a part of the skull.) In fact, the condition is often incorrectly called “TMJ” — but TMJ actually refers to the joint itself. Everyone has two of them, one left and one right, but not everyone has TMD. Your dentist's treatment recommendations will depend on his or her findings in your specific case.What really is the cause of the pain? Simply put, the surrounding structures in the jaw “system” including, the teeth, air sinuses, even neck and back muscles share nerves with these joint structures so that when a problem arises in anyone of them may be evident. The nerves react by telling you something in the system is wrong, and they let you know by saying “pain.”Today, we recognize that more conservative therapies, like massage or wearing a night guard, are effective in most cases.Severe cases will require more complex forms of professional care, which may include minor procedures inside the joint such as cortisone injections or botox or lavage (flushing) of the joint. Team Shambhala