Chapter 21: Bite-wing Technique Flashcards
Define the term: alveolar bone
bone of the maxilla and mandible that supports and encases the roots of teeth (appears radiopaque)
Define the term: alveolar crest / crestal bone
- the most coronal portion of alveolar bone found between teeth
- composed of cortical bone (appears radiopaque)
Define the term: angulation
the alignment of the central x-ray beam in the horizontal and vertical planes
Define the term: horizontal angulation
the positioning of the position-indicating device in a horizontal plane
Define the term: negative vertical angulation
the positioning of the position-indicating device below the occlusal plane that directs the central ray upward
Define the term: positive vertical angulation
the positioning of the position-indicating device above the occlusal plane that directs the central ray downward
Define the term: vertical angulation
the positioning of the position-indicating device in a vertical plane
Define the term: beam alignment device
- a device used to align the position-indicating device in relation to tooth and image receptor
- positions the intraoral image receptor in the mouth and retains the image receptor in position during exposure
- helps stabilize the image receptor in the mouth and reduces the chances of movement, thus reducing the patient’s exposure to x-radiation
Define the term: horizontal bite-wing
the bite-wing receptor is placed in the mouth with the long portion of the receptor in a horizontal direction
Define the term: vertical bite-wing
the bite-wing receptor is placed in the mouth with the long portion of the receptor in a vertical direction
Define the term: bite-wing tab / bite loop / bite tab
a heavy paperboard tab or loop fitted around an intraoral image receptor during exposure
Define the term: bite-wing technique / interproximal technique
an intraoral imaging technique in which the interproximal surfaces of teeth are examined
Define the term: interproximal caries
caries located between two adjacent teeth (appears radiolucent)
Define the term: central ray (CR)
the central portion of the primary beam of x-radiation
Define the term: contact areas
the areas where adjacent tooth surfaces touch each other
Define the term: open contacts
on a dental image, appears as a thin radiolucent line between adjacent tooth surfaces
Define the term: overlapped contacts
on a dental image, the area where the contact area of one tooth is superimposed over the contact areas of an adjacent tooth
Define the term: object-receptor distance
- the distance from the object being imaged *(tooth)) to the image receptor influences image magnification
- less image magnification results when the tooth and the image receptor are as close as possible, and more magnification results when the tooth and receptor are far apart
Define the term: target-object distance
the distance from the source of x-rays (tungsten target in the anode) to the object being imaged (tooth)
Define the term: exposure sequence
a defined order to place and expose intraoral receptors