A dislocated jaw happens when the lower jawbone slides forward past the bony ridge it normally sits behind, locking the mouth open. The fix involves guiding the jaw downward and backward until it slips back into place. This can often be done in an emergency room without surgery, but if dislocations keep happening, there are several approaches to break the cycle.
How a TMJ Dislocation Is Reduced
The classic technique, sometimes called the Hippocratic method, works like this: a clinician stands facing you, wraps their thumbs in gauze, and places them on your lower back molars. Their remaining fingers grip the outside of your jaw. They then apply steady, firm pressure downward and backward. That downward force clears the jawbone past the bony ridge (the articular eminence), and the backward push guides it back into the socket. The gauze protects the clinician’s thumbs in case the jaw snaps shut suddenly.
A variation has the clinician standing behind you rather than in front, using the same thumb-on-molars approach. Other methods skip the inside of the mouth entirely. The wrist pivot technique uses external pressure on the chin and cheeks to achieve the same downward-and-back motion. There’s even a gag reflex method where touching the soft palate with a dental probe triggers the lateral pterygoid muscle to relax, allowing the jaw to slide back on its own.
If muscle spasm is severe, you may need local anesthesia or a sedative before the reduction can happen. Most reductions take only seconds once the muscles relax enough.
What Happens After Reduction
Once the jaw is back in place, the goal is keeping it there while the stretched ligaments and joint capsule recover. A bandage or head-chin strap limits how wide you can open your mouth. This immobilization typically lasts one to four weeks, depending on how long the jaw was dislocated and whether it’s happened before.
During recovery, stick to soft foods and avoid opening your mouth wide. That means no biting into apples, no prolonged dental work, and being careful with yawning. These restrictions sound simple, but they’re the single most important step in preventing an immediate re-dislocation while the tissues tighten back up.
Why TMJ Dislocations Recur
Some people dislocate once and never again. Others deal with it repeatedly. The difference often comes down to anatomy and connective tissue. People with generalized joint hypermobility, where ligaments throughout the body are unusually stretchy, are more prone to TMJ problems. Hypermobility is assessed by checking whether joints like the elbows, knees, and fingers bend past their normal range. If you score high on that kind of screening, your TMJ ligaments are likely looser too, which means the jawbone can slip forward more easily.
Beyond hypermobility, specific triggers include excessive yawning, singing with a wide-open mouth, sleeping with your head resting on your forearm (which pushes the jaw sideways), severe tooth grinding, missing teeth that alter your bite, and certain anti-nausea medications that cause involuntary muscle movements. Trauma to the jaw is another common cause.
Daily Habits That Prevent Dislocation
If you’ve dislocated before, controlling how wide your mouth opens is the core preventive strategy. When you feel a yawn coming on, press your tongue firmly against the roof of your mouth. This physically limits how far your jaw drops and keeps the joint from reaching the point where it can slip forward. Support your chin with your fist during yawns as a backup.
Avoid foods that require you to open wide: tall sandwiches, whole apples, corn on the cob. Cut food into smaller pieces. If you grind your teeth at night, a custom mouthguard (occlusal splint) from a dentist can reduce the forces on the joint and keep the jaw in a more neutral position while you sleep. Stress management also matters, since jaw clenching tends to worsen with anxiety and tension.
Injection Treatments for Repeat Dislocations
When behavioral changes aren’t enough, injections can help stabilize the joint without surgery. Two main approaches exist, and they work through completely different mechanisms.
Botulinum Toxin Injections
Botulinum toxin (Botox) weakens the muscle responsible for pulling the jaw forward, the lateral pterygoid. By reducing the force this muscle generates, the jaw is less likely to overshoot its normal range. The injection is given inside the mouth, near the upper second molar, and a typical dose is about 25 units per side for bilateral dislocations or 50 units on one side if only that joint dislocates. The effects wear off over several months, so repeat treatments are usually needed.
Autologous Blood Injections
This approach takes a small amount of your own blood, typically 3 to 5 milliliters, and injects it into and around the joint capsule. The blood triggers a controlled inflammatory response that produces scar tissue (fibrosis) in the ligaments surrounding the joint. Animal studies show this fibrosis develops in roughly 80% of cases within the joint’s supporting ligaments, effectively tightening the joint so the jaw can’t slide as far forward. It’s a form of prolotherapy, using the body’s own healing response to create structural reinforcement. Injections of concentrated sugar water (hypertonic dextrose) work through a similar mechanism.
Surgery for Chronic Dislocation
When conservative treatments and injections fail, surgery becomes an option. The most studied procedure is eminectomy, which removes or reshapes the bony ridge at the front of the joint socket. This sounds counterintuitive: if the jawbone keeps sliding over that ridge, why not just remove it? The answer is that without the ridge, the jaw can slide freely forward and back without getting stuck. It can move past its normal position, but it won’t lock there.
In a prospective study of 12 patients (21 joints) who had failed conservative treatment, eminectomy produced stable joints and normal chewing in 83% of cases. Two patients (17%) had recurrences after re-injuring the joint about six months later, but both were corrected with a second surgery. The most common complication was temporary weakness in a branch of the facial nerve from tissue stretching during the operation, which resolved within three months in all affected patients. No patients developed bite problems or ear canal complications.
Recovery from eminectomy involves several days of soft food and limited jaw opening, similar to post-reduction care but with a longer overall healing timeline. Most patients return to normal function within a few months.
Matching Treatment to Severity
A first-time dislocation with a clear cause, like a hard hit to the jaw or an unusually wide yawn, typically needs only reduction, brief immobilization, and awareness of prevention habits. If you dislocate two or three times within a year, injection therapies are worth discussing with an oral and maxillofacial specialist. Autologous blood injections offer a more permanent structural change, while Botox requires ongoing treatments but is less invasive. For people who dislocate frequently despite these measures, eminectomy has strong outcomes and a relatively low complication profile. The progression from conservative to surgical management is gradual, and most people find relief well before surgery becomes necessary.