DEN 112 Test 3 Study Material

Purpose of panoramic image

• overall view of the maxilla and mandible

• often used to supplement bite-wing and periapicals

• upper/lower jaw

What is tomography?

imaging technique that allows the imaging of one layer/section of the body while blurring the images of structures in other planes

What is the rotation center?

pivitol point or axis around which the receptor and x-ray tubehead rotate

Purpose of the collimator in panoramic imaging

restricts the size of the x-ray beam

What is the vertical positioning for a panoramic image?

• fixed

• slightly pointing upwards

How does a ghost image appear on a panoramic image?

• found on opposite side of receptor

• larger/higher

• when metallic/radiodense objects are left in

Advantages of Taking Panoramic Images

• impacted teeth

• large lesions

• trauma

• fractures

• eruption/growth patterns

What are panoramic images not good at diagnosing?

• caries

• bone loss

Focal Trough

place chin to ensure arches align properly

How does the PDL appear on image?

radiolucent

Posterior Bone Appearnce

rounded

Anterior Bone Appearance

pointed

Most Common Place for Root Fractures

Maxillary central incisors

Lead Apron Appearance on Radiograph

cone-shaped radiopaque area at bottom of pan.

When should radiographs be reviewed?

as soon as possible after exposure

Appearnce of Cavity on X-ray

radiolucent

What three descriptive words are used to describe lesions?

• location

• size

• appearance