Here is a discussion of the most common and troubling aspects of reversible and irreversible displacement of the articular discs that we see in clinical practice. Among the previously mentioned disorders, there is one category: “Structural disorders: Abnormal changes in the normal organic structure of the joint, including various displacements of the joint disc (reversible anterior displacement, irreversible anterior displacement, rotational displacement of the joint disc, internal and external displacement of the joint disc, etc.), expansion of the joint capsule, and relaxation or avulsion of the joint disc attachment. In cases of joint capsule dilatation, relaxation, and loosening or tearing of the disc attachments, joint subluxation is often associated with joint subluxation. During the progression from a reversible anterior displacement to an irreversible anterior displacement, there is often an intermediate state, which is characterized by recurrent temporary locking during the opening process and failure of the disc to return to its normal position. There should be no degenerative changes in the bony joint structures on X-ray alone, but there may be mild to moderate osteoarthropathy-like changes.” These patients mainly present with painful open and closed mouth popping or restricted mouth opening. Patients are fearful, especially for patients with irreversible disc advancement, and when they see the word “irreversible” in the doctor’s diagnosis, they interpret it as irrecoverable, incurable and incurable. Some patients were really shocked by the doctors’ description of the subsequent development of “irreversible disc displacement” during the consultation. Is this really the case? Here, please refer to the article on temporomandibular joint disorder, whether to operate or to treat conservatively? The author of this article is Professor Ma Xuchen, a specialist at Peking University Dental Hospital, who first introduced the surgical approach to TMJ disorder in China. Patients who are preparing for surgery should read it carefully, carefully and patiently. Surgery is becoming more and more common in medicine, but it is important to catch the indications for surgery to avoid killing the chicken with a bull’s-eye and causing unnecessary results. Patients with non-reducible displacement basically develop from the process of reducible disc anterior displacement. There are many reasons for joint capsule relaxation, secondary to the disorder of the internal structure of the joint, resulting in the displacement of the articular disc, which can be reset in the early stage. At this time, the elastic fibers behind the articular disc can still maintain some tension, and the condyles can return to the underside of the disc in the early stage of mouth opening. Many patients do not quite understand this process, I will use this analogy in the clinic: our TMJ is like a room, the room of normal people is intact, the person inside the room can move back and forth in the room without leaving the room, while patients with reversible displacement, due to various reasons, the back wall of the room broke a hole (posterior capsule relaxation), when the mouth is completely closed, the person then leaves the room to the outside of the room (the condyle slips behind the articular disc), and in the early stages of mouth opening the person returns to the room (the condyle returns to the underside of the disc, at which point the popping occurs). This way many patients understand the process and it is easier for us to teach them how to treat them. Patients with reversible displacement can be found to have the following commonalities in most patients: preference for wide open mouth, unilateral chewing, poor cervical posture with head forward, upper and lower teeth in contact or clenched teeth, and many patients will find that their lower jaw is receding while the popping occurs, or their upper teeth seem to be more convex than before (or the upper teeth appear to be protruding forward because the lower teeth are receding). Therefore, the most important thing is to change these bad habits and postures, and try to maintain the joint in a position that is not displaced. popping? This phenomenon is very telling, note, is very telling, why in the upper and lower incisors contact position and then open, no popping? Because in this position, the joint is still in the correct internal relationship. Many patients ask, “Well, I can’t maintain this position all the time, right? Without exploring too much here, you can refer to this article: Doctor’s Word You Know: How important is the resting position for TMJ disorder. The most important thing is to spend as much time as possible to maintain the joint in the correct internal relationship, so as to give the joint sufficient time to self-repair the loose joint capsule, after a period of time you will find that the popping sound will become lighter, and slowly the popping is gone. Dr. Bin Cai has posted this exercise for you: Exercise to treat TMJ rattling due to reducible anterior displacement of the joint disc. Many patients find that after the joint rattles, the rattling sound becomes more and more muffled, and some patients, especially the younger ones, make it a point to have their joints rattling all day long, and then they gradually start to have the joints stuck and not open very much. When the joint becomes completely irreducible, most of the patients show restricted mouth opening, pain at the end of mouth opening, and some patients have chewing pain and can only eat soft food or even liquid food, which seriously affects their life. Patients at this stage are often very painful and can hardly improve the existing situation by themselves. If they cannot improve the existing condition well by themselves, I still suggest to seek medical treatment early, there are many treatment methods in dentistry, and our rehabilitation department also has many professional weapons to solve this problem: physical therapy for TMJ disease – a new treatment option! The treatment effect is still very good, and we have very much experience in treating patients with restricted mouth opening. Nowadays, the treatment of irreducible displacement is not about restoring the internal disorder of the joint, but mainly about restoring normal joint function, improving pain, and maintaining proper joint use habits, which are also supported by a large amount of literature in that paper by Prof. Ma Xuchen, Sr. In the same words, I hope that this will take away the fear and help every patient suffering from this disease to recover soon.