Specialized Extraoral

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by jperez7
Last updated 5 years ago

Human Anatomy

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Specialized Extraoral

Standard x-ray unit, special head positioning & beam alignment, cephalostat- which includes a flim holder and head positioner, film & intensifying screens, and the grid.

Specialized Extraoral

Extraoral images are outside of the mouth and do no provide the same detail as intraoral images do. Instead, extraoral images focus on impacted teeth, monitor growth and development of the jaw in relations to the teeth, and they identify possible problems between the jaw and teeth (like TMJ.)

What are extraoral images? Why do we use them?

Skull radiography, lateral cephalometric projection, posteroanterior projection, and temporomandibular radiography (also known as TMJ

4 types of specialized extraoral


Skull Radiography

skull radiography is radiographic imaging of the bones of the skull, the nasal sinuses, and cerebral calcifications. Skull x-rays havelargely been replaced by computed tomography scanning of the brain.Skull x rays are performed to examine the nose, sinuses, and facial bones. doctors order these to look at things like skull fractures, tumors, to help a diagnosis, and sinus problems.

Lateral Cephalometric projection

Cephalometric projections are used mainly in orthodontics. A cephalometric projections shows the entire side of the oral cavity and skull, as well as the soft tissue. These radiographs are used to examine the teeth in relation to the jaw, to see the overall profile of a patient, to evaluate disease, abnormalities, trauma, disease, and to evaluate facial growth and development.

The posteroanterior projection is used to evaluate facial growth and development, trauma, disease, and developmental abnormalities. This projection shows the frontal and ethmoid sinuses, the orbits, and the nasal cavities.

Posteroanterior Projection

The tempormandibular joint, also known as the jaw joint, is made up of the condyles, the articular disc, and the mandibular fossa. This area of the jaw is quite hard to X-ray because there are a lot of bony structures right next to each other. Similarly, an x-ray alone cannot be used to view the soft tissues of the TMJ or the articular disc. Instead, we can use cone beam computed tomography (CBCT). However, we can use an x-ray to see the bone in relation to the jaw joint.

Temporomnadibluar radiography


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