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Computed Tomography (CT) of the Temporomandibular Joint with Intravenous Contrast

Published: August 9, 2026Updated: August 16, 2026

A CT scan uses X-rays and intravenous contrast to create detailed images of the jaw joint and nearby structures.

Quick summary

["This scan provides detailed images of the temporomandibular joint to help evaluate jaw-joint problems."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
37243-3
Short code
CT TMJ W contr IV
Synonyms
CT TMJ W contr IV
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

A temporomandibular joint CT scan creates detailed images of the joint connecting the lower jaw to the skull. Intravenous contrast may be used to improve the visibility of certain tissues and abnormalities.

Why might I need this test?

This test may be ordered to evaluate persistent jaw pain, clicking or locking, suspected joint injury, arthritis, or an abnormal growth. It can also help guide treatment or further testing.

How is the test performed?

You will lie on a CT table while the scanner takes X-ray images from several angles. If intravenous contrast is required, it is usually injected through a vein in your arm before the scan begins.

How do I prepare for the test?

Follow the imaging center's instructions, as fasting or other preparation may depend on the exact scan. Tell the care team about prior contrast reactions, kidney disease, iodine allergy, pregnancy, or breastfeeding before receiving contrast.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate joint inflammation or degeneration, fracture, altered joint alignment, disc-related problems, or a mass. The radiologist interprets the images in the context of your symptoms and examination, and the results may guide dental, orthopedic, or other specialist care.

Short name

TMJ CT with IV contrast

Frequently asked questions

Is this test the same as a routine dental X-ray?
No. A CT scan provides cross-sectional images with more detail than a standard dental X-ray and may include contrast.
Does the CT scan use radiation?
Yes. CT imaging uses a small amount of ionizing radiation, and the dose is selected to balance diagnostic detail with radiation exposure.
How soon will the results be available?
Timing varies by the imaging facility and ordering clinician. Your care team will explain when the report and any next steps will be available.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy