Chapter 21: Bite-wing Technique Flashcards
Principles, Equipment and Guidelines of the Bite-wing Technique
Define the term: image receptor holder
a device used to hold an intraoral image receptor in the mouth and stabilize the receptor’s position during the exposure
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: horizontal angulation
the positioning of the position-indicating device in a horizontal plane
Define the term: positive vertical angulation
the positioning of the position-indicating device above the occlusal plane that directs the central ray downward
When using the bite-wing technique, what does incorrect horizontal angulation cause on the image?
overlapped contacts
Define the term: position-indicating device (PID) / cone
- an open-ended, lead-lined cylinder extending from the opening of the tubehead
*aims and shapes the x-ray beam
Define the term: interproximal examination
an intraoral inspection used to examine the crowns of both maxillary and mandibular teeth on a single image
Define the term: interproximal advanced caries
caries located between two teeth that extends to the dentino-enamel junction or through the dentino-enamel junction and into the dentin but does not extend through the dentin more than half the distance towards the pulp (appears radiolucent)
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: mandibular teeth
teeth located in the mandible or lower arch
Define the term: Rinn XCP instrument
- a type of beam alignment device that is used with the paralleling technique
- includes plastic bite blocks, plastic aiming rings, and metal indicator arms
Define the term: interproximal caries
caries located between two adjacent teeth (appears radiolucent)
Define the term: anterior
towards the front
What modification may be made for a patient with extracted teeth when using the bite-wing technique?
the dentist may determine that the patient needs only one bite-wing image per side, if all present teeth can be captured in one image
Define the term: intraoral
inside the mouth
Define the term: bite-wing technique / interproximal technique
an intraoral imaging technique in which the interproximal surfaces of teeth are examined
Why is positive vertical angulation needed for the bite-wing technique?
the +10 degrees compensates for the slight bend of the upper portion of the image receptor and the slight tilt of the maxillary teeth
Define the term: vertical angulation
the positioning of the position-indicating device in a vertical plane
Define the term: Stabe Biteblock
a disposable styrofoam device that can be used to hold an image receptor during exposure
Define the term: Rinn Snap-A-Ray Holder
an intraoral receptor holder used to stabilize an image receptor during exposure
Define the term: central ray (CR)
the central portion of the primary beam of x-radiation
Define the term: parallel
moving or lying in the same plane; always separated by the same distance and not intersecting
When using the bite-wing technique, what is the correct horizontal angulation of the central ray of the x-ray beam?
the central ray is directed perpendicular to the curvature of the arch and through the contact areas of the teeth
Define the term: bite-wing receptor
an intraoral image receptor used to examine the crowns of both maxillary and mandibular teeth on one image
When using the bite-wing technique, how is the central ray of the x-ray beam directed towards the image receptor?
the image receptor is directed through the contacts of the teeth, using a vertical angulation of +10 degrees
Define the term: vertical
an up-and-down 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: interproximal severe caries
cares located between two teeth that extend through enamel, through dentin, and more than half the distance toward the pulp (appears radiolucent)
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
When using the bite-wing technique, how is zero angulation achieved?
when the position-indicating device and the central ray of the x-ray beam are parallel to the floor
Define the term: intraoral image
- an image the results when an image receptor is placed inside the mouth and exposed to x-rays
- used to examine teeth
Define the term: image receptor placement
the specific area where the image receptor must be positioned before exposure
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: horizontal
a side-to-side plane
Define the term: posterior teeth
first and second premolars/bicuspids, and first, second and third molars
Define the term: contact areas
the areas where adjacent tooth surfaces touch each other
Define the term: interproximal
between two adjacent surfaces
Why is a horizontal bite-wing commonly contraindicated for patients with periodontal disease?
the horizontal bite-wing may not extend far enough to show the amount of bone loss
Define the term: perpendicular
intersecting at or forming right angles
Define the term: bite-wing tab / bite loop / bite tab
a heavy paperboard tab or loop fitted around an intraoral image receptor during exposure
When using the bite-wing technique, what is the correct vertical angulation of the central ray of the x-ray beam?
+10 degrees
Define the term: interproximal moderate caries
caries located between two teeth that extends more than halfway through the thickness of the enamel but does not involve the dentino-enamel junction (appears radiolucent)
Define the term: exposure sequence
a defined order to place and expose intraoral receptors
Define the term: intraoral imaging examination
a dental imaging inspection of teeth and intraoral adjacent structures
Are vertical angulations below the occlusal plane considered positive or negative?
negative
Define the term: alveolar bone
bone of the maxilla and mandible that supports and encases the roots of teeth (appears radiopaque)
Define the term: interproximal incipient caries
caries located between two teeth that extends less than halfway through the thickness of the enamel (appears radiolucent)
When using the bite-wing technique what error can occur with an edentulous area if you do not place cotton rolls around the image receptor?
the bite-wing tab or the beam alignment device is not supported, and can result in a tipped occlusal plane on the image
Are vertical angulations above the occlusal plane considered positive or negative?
positive
Define the term: angulation
the alignment of the central x-ray beam in the horizontal and vertical planes
Define the term: bite-wing image
intraoral image that is used to examine the interproximal surfaces of teeth
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)
When using the bite-wing technique, how is the image receptor placed intraorally?
parallel to the crowns of both the maxillary and mandibular teeth
Define the term: maxillary teeth
teeth located in the maxilla or upper arch
