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Clinical 1 > Radiographs > Flashcards

Radiographs Flashcards

1
Q

What does the X-ray tube produce

A

Beams of x-ray

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2
Q

What can happen to the x-ray photons as they transverse tissue

A

Pass through unaltered
Change direction with no energy loss (scatter) or losing energy (scatter energy with absorption)
Be stopped, depositing all energy within tissue (absorption)

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3
Q

What are the different types of image receptora

A

Digital receptors (direct or indirect)
X-ray film packets
Screen-film
Combinations

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4
Q

How can the conversion of the latent image to the permanent visible image occur

A

Digitally of chemically

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5
Q

What are digital receptors

A

They react directly with x-ray photons or interaction with x-ray photons is still there but there has to be another step after to see the outcome

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6
Q

What are x-ray film packets

A

They are plastic covers that inside have a piece of x-ray film which directly reacted with the x-ray

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7
Q

What are screen film combinations used for

A

Extra oral radiography

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8
Q

What does a radiographic image allow

A

Pictorial representation of a part of the body

A record of the pattern of attenuation of the x-ray beam after it has passed through the matter

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9
Q

What are the intra-oral dental radiographic views

A

Bite wings
Periapical
Occlusals

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10
Q

What are the extra-oral dental radiographic views

A

Panoramic (DPR/DPT)

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11
Q

What are bitewings

A

Radiograph taken as patient bites on something between their upper and lower teeth

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12
Q

What teeth are bitewings usually done on

A

Molars

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13
Q

Why is it important not to get an overlap of adjacent teeth

A

So important information is not missed

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14
Q

What are bitewings used for

A

Caries diagnosis where the teeth contact each other
To see alveolar bone levels
Check how good restorations are

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15
Q

What are lateral cephalometric radiographs

A

They focus on the side of the head and are often used for orthodontic treatment

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16
Q

What are the dark changes in bone due to

A

Inflammatory changes in bone

17
Q

What are periapicals used for

A

To assess bone levels and to see the change in bone supporting the roots

18
Q

Why is a panoramic radiograph taken

A

The whole dentition can be seen
Useful for children moving where you are considering taking teeth out to avoid crowding
Can give a generalised view of bone levels

19
Q

What happens in an occlusal radiograph

A

A film is placed in the occlusal plane

20
Q

What are the different types of occlusal radiographs

A

Oblique

True

21
Q

What is an oblique occlusal radiograph

A

Gives a large periapical style

Can be taken everywhere

22
Q

What is a true occlusal radiograph

A

Gives a cross sectional view of the teeth however usually CBCT is used instead
Only used for lower teeth

23
Q

How are radiographs viewed

A 
Using a viewing box
The uppers are placed at the top
Right teeth to your left
Incisors to the midline
Molars to the side edges
Top and bottom row is periapicals
24
Q

What is the curve of spee

A

The curve that goes from anterior to posterior of the teeth and curves up slightly posteriorly

25
Q

How does the maxillary sinus and nasal cavity appear in radiographs

A

They contain air so appear dark

26
Q

Which dental material appears lighter on radiographs

A

Composite

27
Q

Why is scatter an issue

A

It will often result in the image not being produced

When it changes direction it will most likely interact with something or someone else

28
Q

Why are half panoramics sometimes used

A

If we only need information about one side of the jaw and so we don’t want to give more radiation than is needed

29
Q

What is a CBCT

A

Similar to CT but lower dose of radiation
Gives a whole view of the head as it rotates
Does have more radiation than a normal standard 2D radiograph

30
Q

What does the plastic do in the direct digital receptors

A

The protect them

Clinical 1 (12 decks)

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