Imaging Modalities & Selection Criteria Flashcards
What kind of imaging modality?
Periapical (PA)
Bitewing (BW)
Occlusal
Intraoral
What kind of imaging modality?
Panoramic (PAN)
Cephalometric (lateral/frontal)
(CEPH)
Cone Beam Computed
Tomography (CBCT)
Medical CT
Magnetic Resonance Imaging
(MRI)
Extraoral
What kind of imaging modality?
Detect periapical pathosis
Relation between caries lesions and periapical pathosis
Dental abnormalities
Periapical
What kind of imaging modality can also evaluate the following:
Interproximal caries lesions
Alveolar bone height
But the angulation is not ideal for these two tasks
Periapical
What kind of imaging modality?
Detect interproximal caries lesions
Assess alveolar crest height
Bitewing
What kind of imaging modality?
Dental development
- impacted/supernumerary/ missing teeth
Localization
- 90 degrees to first image
Lesion/entity is too large to visualize entirely within one PA image
Not so used anymore –» CBCT
Occlusal
What kind of imaging modality?
Overall evaluation of dentition and bones
- Limited evaluation for caries and alveolar crest (bone loss)
Gross evaluation of temporomandibular joints
Evaluation of impacted teeth
Evaluation of tooth development
Dentomaxillofacial trauma
Developmental disturbances of maxillofacial skeleton
Panoramic
What kind of imaging modality?
Facial asymmetries
Craniofacial development
Jaw trauma
Sinus pathologies
Cephalometric
What kind of imaging modality?
Three-dimensional evaluation of hard tissues
Not good for soft-tissues and caries
Multiple images are acquired and reconstructed
CBCT
What kind of imaging modality?
Three-dimensional evaluation of hard tissues
Good for some soft-tissues
More radiation dose
More expensive
Medical CT
What kind of imaging modality?
High quality images of soft-tissues
Not so good yet for hard tissues
A lot of recent studies on ddMRI (dental-dedicated MRI)
Way more expensive
Does not use ionizing radiation!!
MRI
Benefit _____ risk
>
What are the 3 guiding principles of radiographs
Justify
Optimize
Limit the Dose
Probability that x-rays will provide clinically relevant information that is not otherwise evident
Diagnostic Yield:
Deciduous teeth are less mineralized = develop caries _______
quicker
The greater the consequence of the disease, the more likely the x-ray will be of greater ______
benefit
What kind of x-rays?
Dental development or trauma
PA/Occlusal
What kind of x-rays?
Deep caries/pulp pathosis
PA/BWX
What kind of x-ray?
Screening for caries and periodontal evaluation
BWX
