Exam 1- Radiographs and Films Used in Dentistry, Identification of Radiographs, Mounting and Viewing

What are two types of extraoral radiographs?

Panoramic

Cross-sectional imaging(MRI)

What are the three types of intraoral radiographs?

periapical, bitewing, occlusal

What are the two types of occlusal radiographs?

1. topographic or oblique

2. cross-sectional or true

Identify if this is a:

A. Panoramic

B. Cross-sectional image

C. Periapical

D. Bitewing

E. Occlusal

C

Identify if this is a:

A. Panoramic

B. Cross-sectional image

C. Periapical

D. Bitewing

E. Occlusal

A

Identify if this is a:

A. Panoramic

B. Cross-sectional image

C. Periapical

D. Bitewing

E. Occlusal

D

Identify if this is a:

A. Panoramic

B. Cross-sectional image

C. Periapical

D. Bitewing

E. Occlusal

E

describe the general orientation or relationship of an object to an panoramic

Most common extraoral image

Shows entire maxilla and mandible

Single image

describe the general orientation or relationship of an object to an cross-sectional

CBCT, CT, MRI

Shows large areas

Used for:

Pathosis not seen intraorally

Trismus

Gag reflex

Best for locating buccal vs lingual position

describe the general orientation or relationship of an object to an bitewing

Shows crowns of upper and lower teeth

Shows alveolar crest bone level

Best for interproximal caries

Does NOT show root apices

describe the general orientation or relationship of an object to an periapical

Shows crown, root, and apex

Includes 2–3 mm beyond the root tip

Used to detect apical disease

describe the general orientation or relationship of an object to an occlusal

Large film placed on occlusal surfaces

Shows large areas

Used when PA is not possible

describe the general orientation or relationship of a beam of radiation for an extraoral radiographic (pan and cross-sectional)

Object: Teeth and jaws

Beam: Directed from outside the face

Recording surface: Film/sensor outside the mouth

describe the general orientation or relationship of a beam of radiation to a intraoral radiographic

Object (tooth): Inside the mouth

Beam: Directed through the tooth

Recording surface: Sensor/film inside the mouth

Define Radiopaque

Light on image

High density

Examples: enamel, cortical bone, amalgam

Define radiolucent

Dark on image

Low density

Examples: pulp, sinus, air spaces