TMJ Surgery (Arthroscopy): A Complete Patient Guide

How TMJ Arthroscopy Works

Everything begins with getting the diagnosis right, because the biggest predictor of a good surgical result is operating on the right problem. Dr. Calleja takes a detailed history — when the clicking started, whether the jaw locks, what makes it worse — and examines the joints, the bite, and the chewing muscles. In-office 3D CBCT imaging shows the bony anatomy of the joint, and an MRI is ordered when the soft tissues matter, since MRI is the only imaging that shows the position of the cartilage disc itself. Just as important: the consultation confirms that conservative care has truly been exhausted. If you have not yet had a proper splint, physical therapy, or an adequate trial of anti-inflammatory treatment, that happens first — many patients scheduled "for surgery" elsewhere improve enough on this step that surgery is never needed.

When arthroscopy is the right call, the procedure itself is straightforward from the patient's side. It is performed as an outpatient procedure under general anesthesia — you are fully asleep, comfortable, and still, which matters when the working space is a joint the size of a thumbnail. The whole procedure typically takes about 30 to 90 minutes depending on what needs to be done inside the joint.

Here is what happens step by step. The skin in front of the ear is cleaned and the joint space is gently expanded with sterile fluid. Through a puncture a few millimeters wide, the arthroscope — a lighted camera roughly two millimeters in diameter — enters the upper compartment of the joint, and the inside appears on a monitor: the disc, the joint surfaces, any inflamed tissue, any adhesions. The joint is then thoroughly rinsed with sterile solution (lavage), flushing out the inflammatory chemicals that drive pain. Scar tissue bands are released under direct vision — the lysis of adhesions — freeing the disc and the gliding surfaces to move again. Depending on the findings, a second small puncture may be used for working instruments, inflamed tissue can be treated, and an anti-inflammatory medication can be placed directly inside the joint before the instruments are withdrawn. Each puncture usually needs no more than a single small stitch, if any.

Afterward you wake up in recovery, usually with a small dressing over the joint for the first day, and go home the same day with written instructions, a direct line to our team, and your first follow-up visit already scheduled. Most patients are surprised by how uneventful the day is.

Risks and Safety

TMJ arthroscopy has an excellent safety record — published complication rates range from roughly 0 to 15 percent across series, and the great majority of those complications are minor and temporary, resolving on their own or with simple care. But "low risk" is not "no risk," and you deserve the specific list rather than a wave of the hand.

The structures that matter most sit close to the puncture sites. Branches of the facial nerve — the nerve that moves the eyebrow and facial muscles — pass near the joint, and in a small percentage of cases they are temporarily irritated, causing weakness that almost always recovers fully over weeks to months; one large series of 670 arthroscopies reported facial nerve weakness in well under 1 percent of procedures. The ear canal and middle ear are immediate neighbors of the joint, so temporary ear symptoms — a blocked sensation, mild hearing change, or ringing — can occur and typically settle. Other uncommon issues include bleeding or bruising at the site, infection (rare in this well-supplied area, and reduced further with sterile technique and, when indicated, antibiotics), temporary numbness of the skin patch in front of the ear, joint stiffness while tissues heal, and a bite that feels slightly different for a few days to weeks as the inflammation settles and the joint reseats.

The risk that deserves the most honest airing is not a complication at all: it is the possibility that surgery helps less than hoped. Arthroscopy improves symptoms in most well-selected patients, but a minority — larger in joints with advanced disease — get partial relief or need further treatment later. This is exactly why Dr. Calleja insists on MRI confirmation, a genuine conservative-care trial, and a frank conversation about your specific joint's stage before anyone books an operating room. Call us promptly after surgery if you notice fever above 100.4°F, increasing swelling or discharge at the puncture site, new facial weakness, significant ear pain or hearing change, or pain that worsens after the first few days instead of easing.

• ✦Temporary facial nerve weakness — rare (well under 1 percent in large series) and almost always recovers fully
• ✦Temporary ear symptoms: blocked sensation, mild hearing change, or ringing, typically settling on their own
• ✦Bleeding, bruising, or infection at the puncture sites — uncommon and treatable
• ✦Temporary joint stiffness or a bite that feels slightly off while inflammation settles
• ✦Possibility of incomplete relief, particularly in joints with advanced disease — discussed candidly before surgery

Recovery and Aftercare

Recovery from TMJ arthroscopy is measured in days and weeks, not months. Expect some swelling and soreness in front of the ear for the first several days, managed with ice, a soft diet, and usually over-the-counter pain relief after the first day or two. A small dressing covers the site for about the first day. Most patients with desk jobs or school return within a few days; physically demanding work waits a bit longer. Stick to a soft, no-chew diet — think eggs, pasta, yogurt, smoothies, soft fish — for the first one to two weeks, then advance as comfort allows and as we clear each stage at your follow-ups.

Now the part that patients underestimate and that genuinely decides the outcome: jaw physiotherapy. Arthroscopy frees the joint; exercise keeps it free. Without gentle, consistent motion, the same adhesions the surgery just released can begin to re-form. You will start a specific program of jaw opening and stretching exercises within days of surgery — Dr. Calleja will show you exactly what to do and how often — and for many patients we coordinate with a physical therapist experienced in TMJ rehabilitation. Doing these exercises daily, even when the joint feels tight or mildly sore, is the single most important thing you control in your own result. Patients who commit to the exercise program consistently do better than those who rest the joint and wait.

Set your expectations on the right timeline. Some patients notice the difference — smoother opening, less catching — within the first week or two, but the full benefit builds gradually over weeks to a few months as inflammation quiets and motion returns. Follow-up visits track your mouth opening in millimeters, adjust the exercise program, and often continue splint therapy at night to protect the result. Along the way, call us if anything trends the wrong direction: fever, swelling that increases after the first few days, discharge from the puncture site, new facial weakness or ear symptoms, or a jaw that begins locking again. Those calls are always welcome — catching a small problem early is far easier than treating a late one.