LECTURE 3: FACIAL LANDMARKS Flashcards
making of radiographs of teeth and adjacent structures by the exposure of films to x-rays
DENTAL RADIOGRAPHY
picture on a film produced by the passage of x-rays through an object
RADIOGRAPH
STANDARD RADIOGRAPHIC PROCEDURES
→ area to be radiographed
→ film
→ x-ray beam
In STANDARD RADIOGRAPHIC PROCEDURES, All of these must be in proper relationship to create an accurate radiographic image sometimes called the ________
diagnostic image
imaginary beam of x-rays traveling directly through the center of the cone
CENTRAL BEAM OF RADIATION (CR)
used as a reference point when discussing the orientation of the x-ray beam, object, and film
CENTRAL BEAM OF RADIATION (CR)
very much used in periapical radiography (an intraoral technique used to take images of the tooth up to its surrounding periapical area)
FACIAL LANDMARKS IN ORAL RADIOGRAPHY
areas on the face that provide the radiographer with a quick reference in positioning the PID (directing of the central beam of the radiation)
FACIAL LANDMARKS IN ORAL RADIOGRAPHY
maxillary and mandibular molars
Outer Canthus of the Eye
maxillary and mandibular premolars
Inner Canthus (Pupil) of the Eye
maxillary and mandibular canines
Ala of the Nose
maxillary incisors
Tip of the Nose
mandibular incisors
Chin
The central beam (center of the cone) is directed at the level of beam
these:
→ ala tragus line for maxillary teeth
→ 1⁄2 inch from the lower border of the mandible for mandibular
teeth
direction or alignment of the central beam in a horizontal and vertical plane
CENTRAL RAY ANGULATION
tubehead and the PID are aligned to obtain the optimum angle at which the radiation is to be directed toward the film
CENTRAL RAY ANGULATION
In CENTRAL RAY ANGULATION there are (2) projections or angulations of the tubehead:
o vertical angulation
o horizontal angulation
(for successful exposure techniques, both angulations must be considered)
considered first
VERTICAL ANGULATION