EXERCISES, LESSON 5, SECTION III
MATCHING: For exercises 1 through 2
, match the position with the anatomical
structure(s) that the position demonstrates. Enter the letter that corresponds to your
choice in the space provided. (There is an extra alternative that will not be selected.)
a. An end-on view of the petrous portion, EAM
canal, mastoid air cells, and mastoid antrum.
b. Mandibular ramus, body of mandible, mentum.
c. Mandibular rami, body of mentum of mandible
positioned closest to film.
MULTIPLE-CHOICE. For exercises 3 through 6, select the ONE word or phrase that
BEST completes the statement or BEST answers the question.
When measuring the part for a PA mandible, the entry/exit point is:
a. Between the external occipital protuberance (EOP) and the mental point.
b. Laterally between the midpoint of the mandible.
Between the EOP and tragus.
d. Between the vertex of the skull and the tragus.
The proper patient and part position for an axiolateral oblique mandible is:
a. Patient in true lateral recumbent position, knees flexed, arms at right angle to
body; radiolucent material under lower dorsal region, coronal plane
perpendicular to the table.
b. Patient supine, midsagittal plane perpendicular to the table.
Patient seated or standing (nose-forehead position); midsagittal plane
perpendicular and over the center line of the film; OML perpendicular to the
d. Patient erect or prone; head in a lateral position, with side of interest closest
to cassette; IPPL perpendicular to table; midsagittal plane (chin) rotated 30
degrees face down towards the mandible body being demonstrated.