4D 2,7 principles of radiography Flashcards

1
Q

what is a neoplasia

A

new cell growth

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2
Q

define benign

A

uncontrolled growth of essentially normal cells

usually controlled by surgical removal

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3
Q

define malignant

A

uncontrolled growth and spread of abnormal cells

treatment

surgery, chemo, radio

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4
Q

uses of dental views (anatomy)

A

Root morphology

Bone levels

Position of neuro-vascular tissues

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5
Q

Uses of dental views (pathology)

A
  • Dental caries
  • Periodontitis
  • Peri-radicular disease
  • Other pathology
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6
Q

what are the three intraoral xrays used

A

bite-wing

periapical

occlusal

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7
Q

why would you take bitewing radiograph

A
  • Mainly taken to look for proximal caries
  • Safety net for occlusal caries
  • Show crown of tooth + coronal part of root
  • Also indicated when periodontal bone loss is less than 5mm
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8
Q

there are two types of orientation for bitewings

what are they

A

horizontal

vertical

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9
Q

why would use a horizontal bitewing

A

caries

early periodontal bone loss

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10
Q

why would use a vertical bitewing

A

much more root length

caries and greater periodontal bone loss

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11
Q

whats on this bite wing

A
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12
Q

how much overlap is acceptable

A
  • As few contact points as possible
  • No more than half the thickness of the enamel
  • Enamel dentinal junction needs to be clear
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13
Q

what can be mistaken for caries

A

• Radiolucent restorations

Radio-opaque zone under amalgam restorations

Visual perception – problem of contrast below dense metallic restoration

Root caries may be diagnosed when loss of bone

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14
Q

which radiography would be used to view the whole crown and whole root of tooth

A

periapical radiography

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15
Q

what can be seen from this periapical radiography

A
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16
Q

what are occlusal radiographs used for

A

to get radiographs of

mandibular true occlusal

maxillary anterior occlusal

17
Q

why may a vertex view (maxilliary true occlusal) need a higher dose of radiation

A

because it needs to pass through harder tissues

18
Q

why are panoramic x rays done

A

show the entire mouth area

all the teeth in both the upper and lower jaws

on a single x-ray.

This x-ray detects the position of fully emerged as well as emerging teeth,

can see impacted teeth,

and help diagnosis tumors.

19
Q

why are sialography used

A

is the radiographic examination of the salivary glands.

It usually involves the injection of a small amount of contrast medium into the salivary duct of a single gland,

followed by routine X-ray projections

20
Q

what are cone beam ct used for

A

used to produce 3d images of teeth, soft tissues, nerve pathways and bone in a single scan

21
Q

what is ionising radiation

A

The capacity to induce irreversible changes in cell growth and division through permanent change to DNA (mutation)

22
Q
A