Extraoral imaging

Question 1

Define extraoral image?

Answer 1

an image that is placed outside the mouth during x-ray exposure.
-used to image large area of the skull or jaws

Question 2

Purpose and use of extraoral imaging

Answer 2

1-evaluate large area of the jaw and skull
2-evaluate growth and development
3-evaluate impacted teeth
4-to detect diseases and lesions
5-examine the extant of large lesions
6-evaluate trauma
7-evalutae TMJ

Question 3

Lateral jaw imaging is used to examine?

Answer 3

-the posterior region of the mandible, including
1-body of the mandible projection
2-the ramus of the mandible projection

Question 4

Purpose of evaluating the body of the mandible

Answer 4

evaluate impacted teeth, fractures, and lesions located in the body of the mandible

Question 5

head position in the body of the mandible and the ramus of the mandible imaging

Answer 5

tipped 15 degree toward the side being imaged, while the chin is extended and elevated

Question 6

Purpose of evaluating the ramus of the mandible

Answer 6

evaluate third molars, large lesions, fractures that extend to the ramus of the mandible

Question 7

in ramus of the mandible imaging the beam is alignment is ?

Answer 7

posterior to the third molar, and the vertical angulation is -5 to -20 degrees

Question 8

skull imaging is used mostly by?

Answer 8

-oral surgery
-orthodontics

Question 9

skull imaging include?

Answer 9

1-lateral cephalometric projection
2-anteroposterior projection
3-waters
4-submentovertix
5-revers towne projection

Question 10

what is the purpose of cephalometric?

Answer 10

evaluate facial growth and development
and trauma, disease and developmental anomalies

Question 10

in lateral cephalometric, which side of the patient if near the receptor? and how is the patient positioned?

Answer 10

the left
the patients midsagittal plane is perpendicular to the floor, while the Frankfort plane is parallel

Question 10

what is the purpose of anteroposterior projection?

Answer 10

evaluate facial growth and devlopment, trauma, disease, developmental anomalies

Question 11

in anteroposterior projection the forehead and nose touch the receptor

Question 12

purpose of water projection?

Answer 12

examination of maxillary sinus

Question 13

in waters projection which part of the face touches the receptor

Answer 13

the chin

Question 14

purpose of submentocertix?

Answer 14

to identify the position of the condyle, demonestrate the base of the skull, evaluate fracture of the zygoma.

Question 15

in submentovertex projection which part of the skull touches the receptor

Answer 15

the center of the head

Question 16

purpose of reverse towne projection?

Answer 16

identify fractures of the condylar neck and ramus area

Question 17

patient position in reverse towne projection?

Answer 17

the forehead touches the receptor and the mouth is open as wide as possible