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Radiology I > Intraoral techniques > Flashcards

Intraoral techniques Flashcards

1
Q

What should be seen on a periapical?

A

The entire length of the crown and root
2mm of bone beyond apex
Full extent of lesion and surrounding normal bone

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2
Q

What are the 5 indications for periapicals?

A
  1. Restorations
  2. Caries
  3. RCT or perio treament
  4. Swelling/fistula
  5. Pulpitis or pulp necrosis
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3
Q

What should be seen on a bite wing?

A

Entire crown and 1/3 of the root of upper and lower posteriors, surrounding crestal bone, inter proximal contacts

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4
Q

What are the indications for a bite wing?

A
  1. Clinical suspicion of inter proximal area
  2. Smooth surface caries
  3. See how close caries are to pulp
  4. Visualize restorations, overhang, etc.
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5
Q

In the paralleling technique the image receptor is _____ to the ________ of the tooth?

A

Parallel to the long axis

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6
Q

What is typically increased in the paralleling technique?

A

The object to film distance

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7
Q

How do we compensate for the increased object to film distance in the paralleling technique?

A

Maximize the source to object distance

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8
Q

What are the advantages to the paralleling technique?

A

Teeth are dimensionally accurate and non-diagnostic radiation is reduced

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9
Q

What are the disadvantages to the paralleling technique?

A

Large object to film distance may raise magnification and lower sharpness
Difficult placement in small mouths and around tori

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10
Q

What are the advantages to the bisecting angle technique?

A

Ease of placement in smaller mouths and easier positioning of the tube head due to a shorter cone

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11
Q

What are the disadvantages of the bisecting angle technique?

A

Difficult to visualize the receptor for correct angulation

Image receptor may slip or bend

Hard to get dimensionally accurate images

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12
Q

What is seen in the maxillary central view?

A

The centrals and portions of the laterals

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13
Q

What are the requirements for the maxillary central view?

A

Edges of the teeth parallel to image edge and clear contacts

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14
Q

In the maxillary canine-lateral view what is centered on the image?

A

The contact of the lateral and canine, it is seen clearly without overlap

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15
Q

What teeth are visible on the maxillary premolar view?

A

The distal half of the canine to the 2nd molar

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16
Q

On the maxillary premolar view which contacts must not overlap?

A

Canine to 1st molar contacts

17
Q

The maxillary molar view shows what teeth?

A

The distal half of the 2nd premolar, the 3 molars, and the tuberosity

18
Q

What teeth are included in the mandibular central view?

A

All 4 incisors, mesial of canines

19
Q

In the mandibular canine lateral view what is centered on the image?

A

The canine lateral contact, it is shown clearly without overlap just like the maxillary

20
Q

Are the mandibular premolar views and molar views any different than maxillary?

A

No, show the same things

21
Q

What is seen on a premolar bite wing?

A

Crowns and crestal bone from distal of canine to 1st molar

Clear contacts, occlusal plane is parallel to image receptor edge

22
Q

What is seen on a molar bite wing?

A

The distal of the 2nd premolar to the distal of the last molar

23
Q

Why would you use a vertical bite wing?

A

The patient has a history or or evidence of periodontal bone loss

24
Q

What brand of positioning instrument is used at the school and what does it stand for?

A

Rinn XCP, extended cone paralleling

25
Q

What colors indicate what kind of radiograph?

A 
Blue= anterior PA
Red= bite wing
Yellow= posterior PA
26
Q

What should be inserted in the mouth opposite the bite block?

A

A cotton roll in the buccal vestibule

27
Q

Which quadrants are taken one after the other?

A

1 and 3 then 2 and 4

28
Q

On the maxilla, why is the film often far from the tooth?

A

Hard palate gets in the way

29
Q

On the mandible, is the film closer or further from the tooth?

A

Close, resulting in shorter object film distance

30
Q

As a result of the shorter object film distance on the mandible we can?

A

Use a shorter collimator, less magnification and blurriness

31
Q

What are indications for an occlusal view?

A

Trauma, patient unable to fully open, large lesions, localized lesions, impacted teeth

32
Q

A maxillary occlusal view is useful for?

A

alveolar fractures, periapical lucencies, and midline abnormalities

33
Q

What is a mandibular topographical occlusal view for?

A

Sympheasal fractures and midline anomalies

34
Q

The mandibular topographical occlusal view is useful for?

A

Those who have limited ability to open their mouths

35
Q

The mandibular cross sectional occlusal view is useful for?

A

Expansile lesions and seeing stones in the submandibular duct

Radiology I (9 decks)

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