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Radiographs Flashcards

1
Q

Briefly describe how radiographs work?

A

X-ray photons beamed through an object at a receptor

Attenuation patterns reveal radiographic image, allowing dense material to be visualised

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2
Q

What does the term ‘Transmitted’ mean in the context of Radiography?

A

Photons pass through unaltered

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3
Q

What does the term ‘Absorbed’ mean in the context of Radiography?

A

Photons stopped by tissue

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4
Q

What does the term ‘Scattered’ mean in the context of Radiography?

A

Photons change direction

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5
Q

What does the term Radiolucent mean?

A

Dark areas on the image
Less attenuation of X-rays
Tissue is less dense and allows X-ray transmission shows e.g. caries

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6
Q

What does the term Radiopaque mean?

A

Light areas on the image
Greater attenuation of X-rays
Tissue is more dense and ‘Absorbs’ X-rays
E.g. restoration

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7
Q

Provide three examples of intra-oral radiograph techniques?

A

Bitewing
Periapical
Occlusal

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8
Q

Provide two examples of Extra-oral radiograph techniques?

A

Panoramic
Lateral cephalogram

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9
Q

What is CBCT?

A

CBCT: Cone beam computed tomography
Provide cross-sectional imaging of the teeth/jaws: “3D scan”
Lowest resolution, ⬆️ Radiation dose, ⬆️ Cost

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10
Q

When do we have to use CBCT?

A

when routine dental imaging cannot provide the required information

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11
Q

Why do we use radiographs?

A

1-To show anatomy & pathology not visible to the naked eye
2- Allows visualisation of Hard/mineralised tissues

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12
Q

Curve of spee

A

• Normal anatomical curvature of the occlusal plane
• Curves upwards posterior

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13
Q

How we can indicate which tooth are shown in the radiograph?

A

Anatomical features:

1- Crown morphology
- shape
- number of cusps
2- Root morphology
- 1 root: incisors, canines, some premolars
- 2 roots: some premolars, ↓ molars
- 3 roots: ↑ molars

3- Curve of Spee
4 - Surrounding non-dental anatomy

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14
Q

What is non-dental anatomy?

A

• Maxillary teeth
➢ Maxillary sinus
➢ Nasal cavity
➢ Maxillary tuberosity

• Mandibular teeth
➢ Inferior alveolar canal
➢ Mental foramen
➢ Inferior border of mandible

➢ External oblique ridge
• Mental foramen lies below premolars

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15
Q

What type of radiograph that provides view of side teeth - crowns, some root and interdental bone?

A

Intra- oral bitewing radiography

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16
Q

What type of radiograph this image shows?

A

Bitewing radiograph

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17
Q

What type of radiograph that provides a full length view of tooth/teeth (Hence apical)

A

Periapical radiography

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18
Q

What type of radiograph this image shows?

A

Periapical radiography

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19
Q

What type of radiograph provides ‘zoomed-out’ view of jaw, showing entire dentition\Reduced resolution as a result of scale?

A

Extra-oral Panoramic radiography

20
Q

What type of radiograph this image shows?

A

Panoramic radiography

21
Q

What type of radiograph that provides maxillary or mandibular view of dental arch?

A

Intra-oral occlusal radiography

22
Q

What type of radiograph this image shows?

A

Occlusal radiography

23
Q

What type of radiograph this image shows?

A

Occlusal radiograph

24
Q

What type of radiograph this image shows?

A

Cross-sectional Cone beam computed tomography

25
Q

What type of radiograph this image shows?

A

Cross-sectional Cone beam computed tomography

26
Q

What type of radiograph that 3D scan providing cross sectional image?
Lowest resolution, ⬆️ Radiation dose, ⬆️ Cost

A

Cone beam computed tomograph

27
Q

What type of radiograph is this?

Bitewing
Occlusal
Panoramic
Periapical

28
Q

What type of radiograph is this?

Bitewing
Occlusal
Panoramic
Periapical

A

Periapical

29
Q

What type of radiograph is this?

Bitewing
Occlusal
Panoramic
Periapical

30
Q

What type of radiograph is this?

Bitewing
Occlusal
Panoramic
Periapical

31
Q

What type of radiograph is this?

Bitewing
Occlusal
Panoramic
Periapical

A

Periapical

32
Q

Area with the MOST attenuation of X-ray?

33
Q

Area with the Least attenuation of X-ray?

34
Q

What is the correct descriptor for a dark area on a radiograph?

A

Radiolucent

35
Q

What is the best description of dental caries on a radiograph?

A

Radiolucent with soft, rounded borders

36
Q

Which two teeth can we see?

37
Q

Which four teeth can we see?

38
Q

Which two teeth can we see?

39
Q

Name the missing tooth\ teeth

40
Q

What type of filling does tooth 47 likely have?

A

Mesio-occlusal

41
Q

What type of filling does tooth 46 likely have?

A

Mesio-occlusal-distal

42
Q

What type of filling does tooth 45 likely have?

A

Disto-occlusal

43
Q

What is the name of these restoration?

A

Root canal Filling (RCF)

44
Q

What is the name of the restoration?

45
Q

How many secondary\ permanent teeth are visible on this radiograph?

46
Q

What is the main risk associated with a dental radiograph?

CDS (4 decks)

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