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Dental Nursing - Unit 306 - Ionising Radiation questions and answers .
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Dental Nursing - Unit 306 - Ionising Radiation questions and answers .
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Dental Nursing - Unit306 - Ionising
Radiation questions
and answers 2025-
2026
7 risks associated with ionising radiation - answer 1. Cell mutation
2. Burns
3. Cancer
4. Dermatitis
5. Foetus abnormalities
6. Infertility
7. Death
Controlled Area - answer Area of at least 1.5m from the machine head and
the patient to limit any unauthorised entry during an exposure. This is
because the x-ray scatter can reach up to this distance.
Isolation Switch - answer Situated outside of the controlled area. If a
malfunction occurs, the x-ray machine can be disconnected from the mains
power supply without having to risk exposure to staff.
Lead foil in film packet - answer Absorbs the remaining x-rays that have
passed through the film and prevent them from travelling further.
, Intensifying Screen in extra oral cassette - answer Means a much lower
dose of radiation is used by intensifying the effect of the xray and
producing a larger amount of light photons.
Bitewings - answer - posterior teeth in occlusion
- interproximal mesial/distal caries
- restoration overhangs
- recurrent caries beneath existing restorations
- periodontal bone levels
Periapical - answer - show one or two teeth's full length with their
surrounding bone
- tooth's root canals during endo treatments
- root morphology
- positioning of emerging teeth
- assess fractures
- infections around the area
DPT - answer - full panoramic radiograph
- views all dentition
- TMJ
- ortho assessment
- dentition development in children
- wisdom teeth
- nerve canal in mandible
- sinus
- jaw fractures
Digital Processing - answer Advantages: Quick, cheap, controlled
Disadvantages: Can get lost, can't process exta-oral, regular maintenance
+ auditing
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