Normal Radiographic Anatomy

Question 1

What are the possible intra-oral radiographic views? (3)

Answer 1

• Bitewings
• Periapicals
• Occlusals

Question 2

What are the possible extra-oral radiographic views? (3)

Answer 2

• Panoramic (DPT)
• Cephalometric
• Cone beam computed tomography (CT)

Question 3

Where is the alveolar crest?

Answer 3

• Where the lamina dura of 2 teeth sockets are joined together with bone going over the top of the crest

Question 4

What do periapical radiographs show?

Answer 4

• Shows the full length of at least one tooth

- Shows surrounding anatomical features

Question 5

Air shadows and soft tissues are normal radiolucent features. Give examples of these? (7)

Answer 5

• Oral cavity
• Nasal cavity, orbits
• Maxillary sinus (and other sinuses on facial views)
• Pharynx and larynx
• Inferior alveolar canal, foraminae
• Trabecular spaces
• Pterygomaxillary fissure

Question 6

Hard tissues are examples of normal radiopaque features. Give examples of these? (2)

Answer 6

• Bones: ridges, canals, septa

- Teeth

Question 7

Soft tissues adjacent to air are examples of normal radiopaque features. Give examples of these? (5)

Answer 7

• Tongue
• Soft palate
• Nasal tissues
• Lips
• Ear lobes

Question 8

What are hard tissue anatomical features that can be seen on a panoramic radiograph? (7)

Answer 8

• Hard (bony) palate
• Nasal septum
• Nasal conchae
• Zygomatic buttress (process)
• Zygomatic arch vertebrae
• Hyoid
• Styloid process

Question 9

What are soft tissue anatomical features that can be seen on a panoramic radiograph? (7)

Answer 9

• Tongue
• Lips
• Soft palate
• Nasal soft tissues (philtrum, alae)
• Ear lobe
• Epiglottis
• Posterior pharyngeal wall

Question 10

What are common air cavities that can be seen on a radiograph? (3)

Answer 10

• Maxillary sinus
• Nasal cavity
• Pharynx (naso, oro, laryngo)

Question 11

What are common canals and foramina that can be seen on a radiograph? (4)

Answer 11

• Inferior alveolar (ID) canal
• Mental foramen
• External auditory meatus (important - can usually see very clearly on panoramic radiograph)
• Pterygo-maxillary fissure

Question 12

USE LECTURE FOR STUDYING

Answer 12

Has pictures and descriptions