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Computed Tomography of Mandible Without Contrast

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

A CT scan creates detailed cross-sectional images of the lower jaw to evaluate bone, fractures, lesions, and other structural abnormalities.

Quick summary

["This CT scan examines the structure of the mandible, or lower jawbone, without using intravenous contrast dye."]

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

Key facts at a glance

LOINC
36512-2
Short code
CT Mandible WO contr
Synonyms
CT Mandible WO contr
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?

Computed tomography of the mandible is an imaging test that uses X-rays to create detailed pictures of the lower jawbone. It may be performed with your mouth open or closed, depending on the area being examined.

Why might I need this test?

This test may be ordered to evaluate a jaw injury, pain, swelling, or difficulty biting. It can also help assess bone loss, cysts, tumors, infection-related changes, or other abnormalities of the mandible.

How is the test performed?

You will lie on a table while a CT scanner rotates around your head and neck. The scan is usually painless and generally takes only a few minutes, although you may be asked to remain still or hold your mouth in a particular position.

How do I prepare for the test?

Usually no fasting or medication changes are required. Remove metal objects such as earrings, necklaces, and removable dental appliances if instructed, and tell the imaging team if you are pregnant or may be pregnant. Because this examination is without contrast, no contrast-related preparation is generally needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

The scan may identify fractures, bone loss, cysts, abnormal growths, or changes caused by infection or other jaw conditions. Results are interpreted together with your symptoms, physical examination, and other imaging or tests, and a radiologist or your clinician will explain their significance.

Short name

CT Scan of Mandible Without Contrast

Frequently asked questions

Does this CT scan use contrast dye?
No. The test name indicates that it is performed without intravenous contrast, so you generally will not need contrast-related precautions.
Is a CT scan of the mandible the same as a dental X-ray?
No. A dental X-ray usually shows a limited area of the teeth and jaw, while CT creates more detailed cross-sectional images that can also show the surrounding bone and soft tissues.
Will the CT scan be painful?
The scan itself is generally painless. You may feel brief pressure from the scanner or table, and you may be asked to hold still during the images.
  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