BDS4 Radiology PPs Flashcards
Give 2 examples of developmental bone pathologies:
- tori
- fibrous dysplasia
Give 2 examples of inflammatory bone pathologies:
- alveolar osteitis
- osteomyelitis
Give 2 examples of neoplasm bone pathologies:
- osteoma
- osteosarcoma
Give 2 examples of metabolic bone pathologies:
- Paget’s disease
- osteoporosis
Give 4 differential diagnoses for a multilocular radiolucency:
- ameloblastoma
- odontogenic keratocyst
- cherubism
- odontogenic myxoma
What is the reason for anteriors appearing distorted on an OPT?
outwith focal trough
What is the reason for overall blurry image on an OPT?
movement artefacts
What is the reason for image appearing too wide on an OPT?
canine guide set in front of canines
How can OPT positioning errors be avoided?
- bite block
- chin rest
- temple/forehead rest
- hand rests
- guide lines
Give 3 characteristics of a ghost image:
- higher
- opposite side
- larger/wider
Give 3 ways to reduced patient dose from a dental radiograph:
- rectangular collimation
- fast film
- type F or digital
- FSD 20-30cm
- 60-70kV
- aluminium filtration
Regarding IRR17, give 3 safety features advised:
- controlled areas
- warning signs outside controlled areas
- signs light up when equipment in use
What is ALARP?
As low as reasonably practicable [minimises exposure & dose while achieving image required for diagnosis]
What is an RPA in reference to IRR17?
Radiation Protection Adviser
- advises on risk, regulations, training, quality
Compare and contrast the paralleling technique and bisecting angle technique
Paralleling Technique
- X-ray tube, film sensor, tooth of interest are all arranged parallel to each other
- uses geometric principles to ensure accurate alignment and minimal distortion
