If your dentist or ENT doctor has referred you for a TMJ open-close X-ray, here is what it actually shows — and what it cannot. This plain-film radiograph captures two views of your temporomandibular joint (the hinge connecting your jaw to your skull): one with your mouth closed, one wide open. It helps your doctor assess how the joint’s bony parts align and move, but it does not visualize the soft tissues — the articular disc, ligaments, or muscles — that are often the real source of jaw pain. Think of it as one piece of the diagnostic puzzle, not the whole answer.
What is a TMJ open-close X-ray?
The temporomandibular joint (TMJ) is the small hinge on each side of your face where your lower jaw meets your skull. A TMJ open-close X-ray — sometimes called an open/closed mouth view or transcranial lateral projection — is a plain radiograph that captures the joint in two positions: at rest (mouth closed) and fully open.
The two images allow the radiologist to compare the position of the condyle (the rounded end of the lower jaw bone) within its socket, measure the joint space, and see how far the condyle travels when you open your mouth. It is a functional test, meaning it looks at movement, not just anatomy.
Why would your doctor order this view?
Your doctor may request this X-ray if you have any of the following:
- Jaw pain or tenderness around the ear or cheek
- Clicking, popping, or grating sounds when you open or close your mouth
- Difficulty or pain when opening your mouth wide
- A history of facial or jaw trauma
- Suspected arthritis, ankylosis (joint fusion), or bony growths
- Pre-surgical planning for jaw or orthodontic procedures
It is often a first-line screening tool — quick, affordable, and helpful for ruling out obvious bony problems before more advanced imaging is considered.
How the procedure works
No special preparation is needed. You will sit or stand beside the X-ray machine, and the technician will position your head so that the joint is aligned with the detector. For the first image, you bite down gently with your teeth together. For the second, you open your mouth as wide as you comfortably can. The technician may take the images from a slightly angled direction to get the best view of the joint.
The entire process takes about 10 to 15 minutes, and you can resume normal activities immediately afterward.
What the report tells you — and what it can’t
The radiologist’s report typically describes:
- Condyle position — whether it sits concentrically in the socket or is displaced forward or backward
- Translation — how far the condyle moves when you open your mouth; limited movement may suggest restriction
- Joint space — narrowing can indicate wear or arthritis
- Bony changes — osteophytes (bone spurs), erosion, or signs of fracture
The key limitation: this X-ray cannot show the articular disc, ligaments, or surrounding muscles. If your doctor suspects a disc displacement or soft-tissue problem, an MRI is the standard next step. For detailed 3D bony assessment, CBCT (cone-beam CT) is preferred. A normal X-ray does not rule out a TMJ disorder — many patients with significant symptoms have unremarkable plain films.
| Imaging test | Best for | Limitations | Typical BDT range |
|---|---|---|---|
| TMJ open-close X-ray | Bony alignment, condyle movement, joint space | Cannot show disc or soft tissue | ৳500–৳2,500 |
| MRI | Disc position, soft tissue, inflammation | Expensive, not ideal for bony detail | ৳6,000–৳12,000 |
| CBCT / CT | Detailed 3D bony anatomy, erosion, fractures | Higher radiation than plain X-ray; no soft-tissue detail | ৳3,000–৳6,000 |
Cost of TMJ X-ray in Bangladesh
Prices vary by city, facility type, and whether the test is part of a dental package. The ranges below are typical estimates — always confirm the current price before booking.
| Item | Approx. BDT range | Notes |
|---|---|---|
| TMJ open-close X-ray (private lab) | ৳500–৳1,500 | Single pair of views; often bundled with dental packages |
| TMJ open-close X-ray (hospital / dental college) | ৳1,500–৳2,500 | May include a radiologist’s written report |
| MRI of TMJ | ৳6,000–৳12,000 | Recommended when disc displacement is suspected |
| CBCT of TMJ | ৳3,000–৳6,000 | For detailed bony assessment |
Costs change over time and differ between facilities; confirm with the imaging center before your appointment.
Where to get it done and radiation safety
Dental colleges, oral and maxillofacial surgery departments, and larger private diagnostic centers in Dhaka, Chattogram, and other major cities offer this test. It is typically performed on the same dental X-ray equipment used for panoramic views, so most facilities with a dental radiology unit can do it.
Radiation exposure is low — in the same range as a dental panoramic X-ray. However, always inform the technician if you are pregnant or suspect you might be, as X-rays are generally avoided during pregnancy unless clearly necessary. Your doctor will weigh the benefit against any risk before ordering the test.
Find dentists and dental clinics by division in Bangladesh
If you need a specialist to interpret your TMJ X-ray or want a second opinion, you can search for qualified dentists and dental clinics in your division.
| Division | Find listings |
|---|---|
| Dhaka | Find dentists in Dhaka |
| Chattogram | Find dentists in Chattogram |
| Khulna | Find dentists in Khulna |
| Rajshahi | Find dentists in Rajshahi |
| Rangpur | Find dentists in Rangpur |
| Sylhet | Find dentists in Sylhet |
| Barishal | Find dentists in Barishal |
| Mymensingh | Find dentists in Mymensingh |
Frequently Asked Questions
Will the TMJ open-close X-ray hurt?
No, the procedure itself is painless. You will be asked to sit or stand in front of the X-ray machine, place your chin and head in a specific position, and then open and close your mouth a few times while the technician takes the images. The only discomfort may be from holding your mouth wide open for a few seconds, especially if your jaw is already sore. If you have severe pain or limited mouth opening, tell the technician beforehand — they can adjust the positioning or pause between views. The X-ray does not touch or press on your joint.
How is this X-ray different from an MRI or CT scan for the jaw joint?
A TMJ open-close X-ray is a plain film that shows only the bony parts of the joint — the condyle (the rounded end of the lower jaw) and the socket in the skull. It helps check bone alignment, joint space, and movement. It cannot show the articular disc, ligaments, or surrounding muscles, which are common sources of pain and clicking. An MRI is the best test for those soft tissues, while a CT scan gives more detailed 3D bone images. Your doctor may start with the X-ray as a quick, low-cost screening tool, then order an MRI or CT if the X-ray looks normal but your symptoms continue.
Do I need to prepare anything before the TMJ X-ray?
No special preparation is needed. You can eat, drink, and take your regular medications as usual. However, you should remove any metal objects from your head and neck area — such as earrings, necklaces, glasses, hairpins, or dentures with metal parts — because they can interfere with the image. If you are pregnant or think you might be, inform the doctor and the X-ray technician before the exam, as X-rays are generally avoided during pregnancy unless absolutely necessary. Wear comfortable clothing and be ready to follow simple instructions to position your jaw.
Sources
The following sources are from international journals, government health agencies, or recognized medical organizations:
- TMJ disorders – Symptoms and causes (mayoclinic.org)
- Temporomandibular Disorders (TMD) (nidcr.nih.gov)
- World Health Organization — TMJ X-Ray / TMJ Open-Close View (who.int)
- MedlinePlus — TMJ X-Ray / TMJ Open-Close View (medlineplus.gov)
- CDC — TMJ X-Ray / TMJ Open-Close View (cdc.gov)
- NHS — TMJ X-Ray / TMJ Open-Close View (nhs.uk)
