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Dental Assisting > Radiology > Flashcards

Radiology Flashcards

1
Q

What diagnosis is a Panoramic X-ray used for?

A

Complete survey of dentition
Locate suspected fractures
Determine position of impacted teeth
Locate tumors, cysts, other pathological conditions
Eval. Growth pattern of the jaw and skull

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2
Q

What is DEVAA

A

Digital Enterprise Viewing and Acquisition Application

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3
Q

What are the sources of Radiation?

A

Natural and Man-Made

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4
Q

Sources of natural radiation?

A

Cosmic: space
Terrestrial: soil
Internal: inhaled and ingested e.g. Radon

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5
Q

Examples of man made radiation

A

Medical diagnostic and treatment
Consumer and industrial
Other: power plants and nuclear testing

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6
Q

What is the ALARA philosophy?

A

As Low As Reasonably Achievable

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7
Q

Advantages to panoramic X-Ray

A

Increased area of diagnosis
Reduce radiation to patient
Provide bilateral view
Easy to operate

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8
Q

What is the Direct Hit Theory?

A

Photons colliding with important cell chemicals breaking and causing critical damage to molecules

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9
Q

Tissue sensitivity in order

A 
Bone Marrow
Reproductive cells
Skin
Lens of the eye
Nerve
Muscle
Bone marrow
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10
Q

Who discovered dental X rays and when?

A

Wilhelm Konrad Roentgen in 1895

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11
Q

What are the six components of the digital X-ray system?

A 
High frequency X-Ray Generator
Wall Framework
Control timer unit
Scissor arm
On/off switch
Rectangular collimating (optional)
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12
Q

Which wavelengths have more penetration?

A

Short wavelengths

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13
Q

What is the exception to centering the bite block and why?

A

Bicuspids, due to the curvature of the arches.

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14
Q

What are the four uses for the bisecting angle technique?

A

Detect proximal caries
Examine pulp chamber
Check for overhangs
Check for calculus

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15
Q

What are two uses of the paralleling technique?

A

View of the entice tooth for abnormalities

View adjacent tissues for disease or abnormalities

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16
Q

What happens when the teeth are not touching the bite block?

A

Excessive margin

17
Q

What happens when the sensor is not parallel to the teeth?

A

Overlapping

18
Q

What is another name for the bite wing s-Ray?

A

Bisecting angle technique

19
Q

Where should you stand when taking the exposure?

A

Behind the lead shield

20
Q

What are the most common exposurre errors?

A 
Foreign images
Blurred
Elongation
Foreshortening
Over exposure
Under exposure
Overlapping
Cone cut
21
Q

What are Radiation protection guidelines?

A

1250 mrem/qtr

5000 mrem/yr

22
Q

Who discovered dental X-rays?

A

Wilhelm Konrad Roentgen

Dental Assisting (5 decks)

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