MRI TMJ in Delhi: Why the Scan Is Done With Your Mouth Open and Closed, What Disc Displacement Actually Means, and When a CT Is Better (2026)

An MRI of the temporomandibular joint is unusual among scans: it is performed twice in the same sitting, once with your mouth closed and once with it held open. That is not a convenience or a double-check. The entire diagnosis depends on comparing the two.

If your dentist, orthodontist, oral surgeon or ENT doctor has advised an MRI TMJ, it is almost always because of a small piece of cartilage called the disc — where it sits, and crucially whether it moves back into position when you open your mouth. This page explains what the scan shows, what the terms in your report mean, and the one honest caveat that the whole subject turns on.

Why ear pain so often turns out to be a jaw problem

It is worth starting here, because it explains how many patients arrive at this scan.

The temporomandibular joint sits directly in front of the ear canal — place a finger just in front of your ear and open your mouth, and you will feel it move. Because of that proximity, and because the nerve supply overlaps, TMJ problems very commonly present as ear pain, a blocked sensation in the ear, or noise in the ear.

So a great many people with a TMJ disorder go first to an ENT specialist, are examined, found to have a completely normal ear drum and normal hearing, and are then redirected towards the jaw joint. If that has happened to you, nothing has gone wrong — it is the usual route.

The distinction matters for which scan you need. If the question is genuinely about the ear — the middle ear, the mastoid, cholesteatoma, hearing loss — the study is an HRCT temporal bone. If the question is the jaw joint and its disc, it is an MRI TMJ. They image structures a centimetre or two apart and neither substitutes for the other.

What the TMJ disc is, and why everything depends on it

The temporomandibular joint connects the condyle — the rounded top of the lower jaw — to a socket in the skull base. Between the two sits a small, biconcave pad of fibrocartilage: the disc (or meniscus).

The disc has a specific job. The TMJ does not simply hinge; when you open wide, the condyle both rotates and slides forward. The disc has to travel with it, acting as a moving cushion between two bony surfaces. In a normal joint, the thickened back part of the disc sits over the top of the condyle when your mouth is closed, and the whole disc glides forward in step with the condyle as you open.

When that coordination fails, the disc slips forward and the condyle ends up pressing on tissue that was never designed to bear it. That is the mechanism behind most of the clicking, locking and pain people experience.

And the disc is invisible on every other test. It does not appear on a dental X-ray, an OPG, or even a CT — those show bone. MRI is the only study that images the disc directly. That is the single reason this scan exists.

Why the scan is done mouth-closed and mouth-open

This is the heart of it.

With your mouth closed, the radiologist checks where the disc is sitting. If it has slipped forward of the condyle, that is a displaced disc.

With your mouth open, the radiologist checks what the disc did. And there are two possibilities, which look similar to you but mean quite different things clinically:

Anterior disc displacement WITH reduction. The disc is forward when the mouth is closed, but as you open, the condyle catches up and slides back underneath it — the disc “reduces” into its normal relationship. That snapping back into place is the click or pop you hear. Mouth opening is usually near-normal. This is the commoner and generally less severe pattern.

Anterior disc displacement WITHOUT reduction. The disc is forward when closed, and it stays forward when you open. It now physically blocks the condyle from sliding fully forward. The result is limited mouth opening — often described as a “closed lock” — and typically the clicking has stopped, because there is no longer any snapping back. Pain is often worse.

That last point is worth repeating, because it surprises people and because it is the reason not to ignore a change in symptoms: if you used to click and now you cannot open your mouth properly and the clicking has gone, that is not improvement. It usually means the disc has stopped reducing. Tell your dentist or oral surgeon.

A single closed-mouth scan can tell you the disc is displaced. Only the open-mouth series tells you which of these two situations you are in — and that is what changes treatment.

What else the scan assesses

• Disc shape. A healthy disc is biconcave — thin in the middle, thicker front and back. A chronically displaced disc becomes flattened, folded, rounded or deformed. A deformed disc is less likely to reduce and is a sign of long-standing disease.
• Joint effusion. Excess fluid in the joint, bright on fluid-sensitive sequences. Correlates reasonably with active pain.
• Condylar marrow oedema. Fluid signal within the bone of the condyle, which can indicate active stress or, in some settings, avascular change.
• Degenerative change. Flattening of the condyle, osteophytes, subchondral sclerosis, erosions, joint space narrowing — osteoarthritis of the TMJ.
• Condylar resorption. Progressive loss of condylar height, which alters the bite and the shape of the lower face. Relevant in adolescents and in inflammatory arthritis.
• Inflammatory arthritis involvement. The TMJ is affected in rheumatoid arthritis and, importantly, in juvenile idiopathic arthritis in children, where it can be silent and still damage growth. MRI is the test that detects it early.
• The lateral pterygoid muscle and its attachment, and the surrounding soft tissues.
• Ankylosis — fusion of the joint, whether fibrous or bony.
• Rarer things — synovial chondromatosis, loose bodies, tumours and tumour-like lesions.
• Both joints together. The study always covers both sides, even when only one hurts, because the joints work as a pair and the asymptomatic side is frequently abnormal too.

The honest caveat: disc displacement is common in people with no symptoms

This is the most important thing on this page, and it is the part most pages leave out.

Anterior disc displacement is found on MRI in a substantial proportion of people who have no jaw symptoms whatsoever. Clicking without pain or restriction is extremely common and, on its own, is generally not regarded as a disease needing treatment.

Two consequences follow, and both are practical.

First, a report describing disc displacement does not automatically mean you need an intervention. Temporomandibular disorders are diagnosed and managed clinically — on your pain, your opening, your bite, your examination — with the MRI as supporting information. The great majority are managed conservatively: reassurance, soft diet during flares, jaw rest, physiotherapy and exercises, addressing clenching and grinding, a splint where indicated, and treating the stress that very often drives the clenching. Surgery is a minority path.

Second, the opposite also holds — a near-normal-looking joint in someone with real pain does not mean the pain is imagined. Muscle pain (myofascial pain of the chewing muscles) is one of the commonest causes of jaw and facial pain, and it produces few or no MRI findings. If your scan is reported as largely normal and you are still in pain, that is a meaningful result, not a dead end: it points away from the joint and towards the muscles.

So read your report, then take it back to the clinician who ordered it. Do not act on a single line in it.

MRI TMJ versus CT or CBCT: which one do you need?

They answer different questions and are often complementary.

MRI is for soft tissue. The disc, its position and shape, effusion, marrow oedema, synovitis, muscles. No radiation. If the clinical question involves clicking, locking, limited opening or pain, MRI is the study.

CT, or cone-beam CT (CBCT) in dental practice, is for bone. It shows cortical detail, erosions, osteophytes, condylar fracture, bony ankylosis and the exact three-dimensional bony anatomy far better than MRI. If the question is a fracture, bony fusion, a bone lesion, or planning jaw surgery or an implant, CT is the study. Our page on the CT bone and joint scan covers that territory, and MRI versus CT explains the general principle.

Two other dental and facial studies sit nearby and are often ordered alongside:

• OPG (panoramic dental X-ray) — a wide overview of the teeth and jaws, useful for a dental cause of facial pain, impacted teeth and overall jaw survey. It shows the condyles only crudely. See our OPG page.
• Sialography — for the salivary glands, when swelling in front of or below the ear turns out to be glandular rather than joint-related. See our sialography page.

And if facial pain is accompanied by nasal blockage or sinus symptoms, a CT PNS may be the more relevant study.

How the scan is performed

1. Safety screening. A detailed form about implants, devices, surgery and metal. The most important step — details in the next section.
2. Removing metal. Earrings, piercings, hair clips, spectacles and removable dentures all come off. Removable orthodontic plates come out.
3. Positioning. You lie on your back, head first, with your head in a coil. Small surface coils may be placed over each joint. Your head is padded so it cannot rotate — any movement between the two series makes them impossible to compare.
4. Closed-mouth series. Teeth gently together, jaw relaxed, not clenched. Oblique sagittal images are acquired perpendicular to the long axis of each condyle, plus coronal images.
5. Opening the mouth. You are given a bite block or opening device to hold your mouth at a fixed, comfortable open position — this is far more reliable than trying to hold it open by effort, which drifts and shakes.
6. Open-mouth series. The same planes are repeated with the mouth held open.
7. Contrast, only if needed. Most TMJ studies are plain.

Expect roughly 30 to 45 minutes in the scanner, because both joints are imaged in two positions each.

The one thing that most affects your scan quality

Do not clench during the closed-mouth series, and do not move your head between the two series.

Clenching pulls the condyle up and back and changes the very relationship being measured. Keep your teeth in light contact and your jaw loose. And because the whole diagnosis is a comparison between the closed and open images, if your head shifts position in between, the two cannot be reliably compared. Get comfortable before the first series starts.

If holding your mouth open is painful — which it often is, especially in a closed lock — say so. The device can be adjusted to a smaller opening. A slightly smaller but steady opening gives a better study than a wide one you cannot hold still.

Braces, dental metal and implants

This deserves its own section, because most patients having this scan have been through dental treatment.

Fixed orthodontic braces. Modern brackets and wires are generally not a safety problem, but they sit close to the area being imaged and can create artefact. Stainless steel appliances cause more than titanium or ceramic. Tell the centre at booking that you have braces so the sequences can be adapted and so you know what to expect. Your orthodontist can advise whether anything is removable.

Removable plates, retainers and dentures come out before the scan.

Dental implants and crowns. Almost always MRI-safe. They may cause local artefact but are usually far enough from the joint not to spoil it.

Other implants and devices must be declared as for any MRI: cardiac pacemaker, implanted defibrillator, cochlear implant or other implanted hearing device, aneurysm clips or coils, implanted pumps and stimulators, metallic foreign body — particularly any metal fragment injury to the eye — heart valves and stents, permanent eye makeup and metallic tattoo pigment. Also declare pregnancy, kidney disease if contrast may be used, and claustrophobia.

A declared implant is a problem the centre can plan around. An undeclared one is a safety risk.

If closed MRI is difficult for you

An MRI TMJ places your head deep inside the bore with a coil around it, and then asks you to hold a bite block in place for several minutes. For anyone claustrophobic, that is a demanding combination — and it is a real reason scans get abandoned.

Say so when you book, not on arrival. An open or wide-bore scanner removes most of the enclosure; our pages on open MRI in Delhi, open versus closed MRI and choosing an open MRI centre set out the trade-offs honestly.

Practical measures that help: the first slot of the day, a companion in the room, eyes closed from before you enter the bore, music headphones, and the call button in your hand. Knowing in advance that the mouth-open series is only a few minutes also helps more than people expect.

Preparation

• No fasting for a plain MRI TMJ. Eat and drink normally.
• Take your usual medicines. If you take something for jaw pain, take it as prescribed — being comfortable helps you stay still.
• Complete the safety form carefully, and declare braces and dental work.
• Leave earrings and piercings at home to save time.
• Bring the prescription with the clinical history. “Clicking on the right with full opening” and “unable to open beyond two fingers for three months, clicking stopped” lead to different emphases in the report. Mention which side is worse, whether you click, whether opening is limited, and whether you clench or grind.
• Bring previous imaging — OPG, CBCT, earlier MRI — and any orthodontic or oral surgical notes.
• Mention recent dental procedures or a recent change in your bite.

Reading your report: a plain-English glossary

• Condyle — the rounded top of the lower jaw bone that forms the joint.
• Glenoid fossa / articular eminence — the socket in the skull base and the bony ridge in front of it.
• Disc / meniscus — the fibrocartilage pad between condyle and socket.
• Biconcave — the normal disc shape: thin centrally, thicker front and back. Its loss indicates chronic change.
• Posterior band — the thickened back part of the disc, whose position over the condyle is the key measurement in the closed-mouth series.
• Anterior disc displacement (ADD) — the disc has slipped forward of its normal position.
• With reduction — the disc returns to its normal relationship when the mouth opens. Usually the cause of clicking.
• Without reduction — the disc stays displaced on opening. Usually the cause of limited opening, or “closed lock”.
• Anterolateral or anteromedial displacement — the disc has slipped forward and to one side.
• Reducible / non-reducible — the same concept as with and without reduction.
• Restricted translation — the condyle does not slide forward as far as it should on opening.
• Hypermobility / subluxation — the condyle slides too far forward, which can cause an open lock.
• Joint effusion — excess fluid in the joint. Often associated with active pain.
• Condylar marrow oedema — fluid signal in the bone of the condyle.
• Condylar flattening / osteophyte / sclerosis / erosion — degenerative changes, the TMJ equivalent of osteoarthritis.
• Condylar resorption — progressive loss of condylar height, which can change the bite.
• Ankylosis — fusion across the joint, fibrous or bony.
• Synovitis — inflammation of the joint lining.
• Pannus — inflammatory tissue seen in inflammatory arthritis.

And the caveat again, because it belongs right here: displacement and clicking are common in people without symptoms. The report describes anatomy. Whether it explains your pain is a clinical judgement.

Will I need contrast?

Usually not. Disc position, disc shape, effusion and degenerative change are all assessed on a plain study.

Contrast is added mainly when inflammatory arthritis is suspected — particularly juvenile idiopathic arthritis in a child, where enhancement helps show active synovitis — and when a tumour or an unusual lesion is being characterised. If contrast is planned, a recent kidney function report is needed; see our contrast MRI page.

After the scan

There is nothing to recover from. You can eat, drive and return to work immediately. If your jaw aches a little from holding the bite block, that settles quickly; a warm compress and a soft meal help.

Collect a digital copy of the images as well as the report — your oral surgeon, orthodontist or dentist will want to look at the closed and open series side by side themselves, which a printout cannot show properly.

What an MRI TMJ costs in Delhi

The price of an MRI TMJ in Delhi depends on whether both joints are imaged (they usually are), whether both open and closed series are included (they should be — a closed-only study answers half the question), whether contrast is required, the scanner and protocol used, whether a radiologist’s report and digital copy are included, and whether you need it urgently or outside normal hours.

Because of that we do not publish a fixed figure here that could be out of date by the time you read it, or that might not match what your prescription asks for. The fastest way to get an accurate, all-inclusive number is to send us a photo of your prescription on WhatsApp. You will get today’s actual price for exactly the study your dentist or surgeon has specified — both joints, open and closed, report included — along with the next available slot, before you travel.

Send your prescription on WhatsApp for today’s MRI TMJ price →  |  Call 9555999960

For a wider view across MRI studies see our MRI scan cost in Delhi page.

Getting an MRI TMJ scan in West Delhi

At Edge Imaging & Diagnostics, a NABH-accredited diagnostic centre in Paschim Vihar, West Delhi, an MRI TMJ is performed on both joints in both closed and open mouth positions as standard, with oblique sagittal planes set perpendicular to each condyle rather than straight sagittal, and reported by a radiologist.

Practical points worth knowing:

• Insist on open and closed series. A closed-mouth-only study can say the disc is displaced but cannot say whether it reduces — and that is the finding that changes treatment. If you are quoted a cheaper TMJ scan anywhere, ask whether the open-mouth series is included.
• Tell us about braces at booking. Sequences can be adapted and you will know what to expect.
• Tell us your actual symptoms. Which side, whether you click, whether opening is limited, whether the clicking has recently stopped. That last detail in particular changes what the radiologist looks for most carefully.
• Easier than most head MRIs in one respect — the series are short, so the mouth-open part is only a few minutes. Open MRI is available if enclosure is a problem.
• Everything under one roof — MRI, CT, digital X-ray including OPG, ultrasound and pathology in the same building, so a combined dental and joint assessment does not mean two journeys.
• Bring previous OPG, CBCT or MRI and any orthodontic notes.
• Open on Sunday — see our Sunday diagnostic centre page.
• CGHS and DGHS empanelled — details on our empanelment page.
• Where patients travel from — Paschim Vihar, Rajouri Garden, Tagore Garden, Punjabi Bagh, Janakpuri, Tilak Nagar, Vikas Puri, Moti Nagar, Nangloi and Raghubir Nagar. See our West Delhi diagnostic centre and Rajouri Garden pages.

Frequently asked questions

Is an MRI TMJ painful?

The scan itself is painless and there is no injection for a plain study. The only discomfort is holding your mouth open on a bite block for a few minutes, which can ache if your jaw is already sore. Tell the staff — the device can be set to a smaller opening, and a smaller steady opening gives a better scan than a wide unsteady one.

Why do I have to open my mouth during the scan?

Because the diagnosis is a comparison. The closed-mouth series shows whether the disc has slipped forward. The open-mouth series shows whether it slides back into place when you open. That difference — displacement with reduction versus without reduction — is what determines your symptoms and your treatment, and it cannot be seen on a closed-mouth study alone.

What is anterior disc displacement with reduction?

The disc sits forward of its normal position when your mouth is closed, but as you open, the condyle slides back underneath it and the disc returns to a normal relationship. That snapping back is usually what you hear as a click or pop. Mouth opening is often near-normal, and this is generally the less severe pattern.

What is anterior disc displacement without reduction?

The disc stays forward even when you open, and physically blocks the condyle from sliding fully forward. This typically causes limited mouth opening — a “closed lock” — and often more pain. Notably, the clicking usually stops, because there is no longer any snapping back into place.

My clicking stopped but now I cannot open my mouth fully. Is that an improvement?

Usually not. That combination often means the disc has stopped reducing — it is now blocking the joint rather than snapping back. It is worth telling your dentist or oral surgeon rather than assuming the problem has resolved.

Does an MRI TMJ use radiation?

No. MRI uses a magnetic field and radio waves, with no ionising radiation at all. This also makes it suitable for children, which matters because the TMJ is involved in juvenile idiopathic arthritis.

Do I need to fast?

No, not for a plain study. Eat, drink and take your usual medicines normally. The centre will advise you if contrast has specifically been requested.

How long does it take?

Usually 30 to 45 minutes in the scanner, because both joints are imaged in two positions each. Allow about an hour for the whole appointment including screening and changing.

Can I have an MRI TMJ with braces on?

Generally yes. Modern brackets and wires are usually not a safety problem, but they sit close to the area being scanned and can create artefact, with stainless steel causing more than titanium or ceramic. Tell the centre at booking so the sequences can be adapted, and ask your orthodontist whether any component is removable. Removable plates and retainers should be taken out.

Will dental implants or crowns spoil the scan?

Almost always they are MRI-safe, and while they can cause local artefact they are usually far enough from the joint not to spoil the study. Declare them anyway on the safety form.

Should it be an MRI or a CT/CBCT of my jaw joint?

MRI for soft tissue — the disc, its position and shape, effusion and synovitis — which is what matters in clicking, locking, limited opening and pain. CT or CBCT for bone — fracture, bony ankylosis, fine cortical detail, bone lesions and surgical or implant planning. They are often complementary, and your dentist or surgeon decides which question comes first.

Why is my ear pain being investigated as a jaw problem?

Because the jaw joint sits directly in front of the ear canal and the nerve supply overlaps, so TMJ disorders very commonly present as ear pain, a blocked feeling or noise in the ear. Many patients are seen first by an ENT specialist, found to have a normal ear and normal hearing, and then redirected to the jaw joint. That is the usual route, not a mistake.

My report says disc displacement. Do I need surgery?

Very likely not. Anterior disc displacement is found on MRI in a substantial proportion of people with no jaw symptoms at all, and clicking without pain or restriction is generally not treated. Most temporomandibular disorders are managed conservatively — jaw rest, soft diet during flares, physiotherapy and exercises, addressing clenching and grinding, a splint where indicated, and treating the stress that often drives the clenching. Surgery is a minority path and that decision belongs to your oral surgeon.

My scan was reported as nearly normal but I still have pain. What does that mean?

It is a meaningful result rather than a dead end. Myofascial pain of the chewing muscles is one of the commonest causes of jaw and facial pain and produces few or no MRI findings. A largely normal joint points away from the disc and towards the muscles, which changes treatment — usually towards physiotherapy, habit change and managing clenching.

Why is the scan done on both sides when only one hurts?

Because the two joints work as a pair, and the side that does not hurt is frequently abnormal as well. Comparing them is informative, and knowing the state of both matters if any treatment is being planned.

Will I need contrast?

Usually not. Contrast is added mainly when inflammatory arthritis is suspected — particularly juvenile idiopathic arthritis in a child, where it helps show active synovitis — or when an unusual lesion or tumour is being characterised. A recent kidney function report is needed if contrast is planned.

I am claustrophobic. Can I manage this scan?

It is demanding, because your head is deep in the bore with a coil around it and you are holding a bite block. Say so when you book so an open or wide-bore scanner can be used. An early slot, a companion in the room, eyes closed before entering, music headphones and the call button in your hand all help. It also helps to know the mouth-open series lasts only a few minutes.

What should I avoid doing during the scan?

Two things. Do not clench during the closed-mouth series — clenching pulls the condyle up and back and changes the very relationship being measured, so keep your teeth in light contact and your jaw loose. And do not move your head between the closed and open series, because the whole diagnosis is a comparison between the two.

How soon will I get the report?

Ask when you book. At Edge Imaging & Diagnostics a routine MRI TMJ report is normally available the same day. Collect a digital copy of the images as well, because your dentist or oral surgeon will want to look at the closed and open series side by side themselves.

---

Medically reviewed by Dr. Nishant Thapar, Consultant Radiologist and Founder, Edge Imaging & Diagnostics, West Delhi. Last reviewed: October 2026.

Disclaimer: This article is general patient information and does not replace a consultation. MRI findings must always be interpreted together with your symptoms, examination and bite assessment by the dentist, orthodontist, oral and maxillofacial surgeon or physician treating you. Disc displacement and joint clicking are common findings in people without symptoms, and the presence of either on a scan does not by itself indicate a need for treatment. All treatment decisions, including any splint therapy, physiotherapy, injection or surgery, belong to your treating clinician. Do not start, stop or change any treatment on the basis of this page. MRI safety decisions about braces, dental appliances, implants and devices must be made by the centre and your doctor using your actual documentation.