occlusal radiography skull

Question 1

film sizes
pediatric
anterior PA, peds
standard [adult PA, BW, child occlusal]
special BW (no longer in use)
occlusal

Answer 1

0 pediatric
1 anterior PA, peds
2 standard
3special BW (no longer in use)
4occlusal

Question 2

larger size receptors allow

Answer 2

larger segments of jaw to be examined

Question 3

clinical indications

Answer 3

1. Roots, impactions, supernumeraries
2. Foreign bodies
3. Localization of stones in ducts
4. Alteration to cortical bone
5. Sinus and nasal integrity
6. Fractures
7. Extent of pathoses

Question 4

occlusal radiography maxilla and mandible

Answer 4

1. standard cross-sectional
2. lateral (right/left) cross-sectional
3. anterior topographical

Question 5

1. standard cross-sectional maxilla

vertical angle=
central ray (CR)=

Answer 5

VA: + 65 to 70 degrees (pointed downward)
CR: bridge of nose and center of psp plate

Question 6

2. lateral cross-sectional maxillary
   vertical angle:
   Central ray:

Answer 6

VA: +55-60 degrees (pointed downward)
CR: posterior maxilla

Question 7

3. anterior topographical maxilla
   vertical angle:
   central ray:

Answer 7

VA: +55 to 60 degrees (pointed downward)
CR: 1/4 to 1/2 inches above tip of nose

Question 8

1. standard cross-sectional mand
   VA:
   CR:

Answer 8

VA: perpendicular to PSP
CR: between mandibular first molars; along mid-sagittal plane; move beam away about 2 inches or 5cm

Question 9

2. lateral cross-sectional mand
   VA
   CR

Answer 9

VA: perpendicular to PSP plate following long axis of first molar
CR: center of PSP plate at apex of first molar

Question 10

with maxilla, cross-sectional vs anterior topographical which has shorter teeth

Answer 10

anterior cross-sectional

Question 11

cant take radiographs with solid state sensors

T/F

Answer 11

true only with PSP/film

Question 12

lack of expansion noted from occlusal image, type of cyst

Answer 12

traumatic bone cyst

Question 13

under exposed to reveal objects of ___density

Answer 13

lesser

Question 14

3. anterior topographical mandible
   VA
   CR

Answer 14

VA: -55 to 60 degrees (pointed upward) bisecting angle between PSP plate and long axis of incisor teeth

CR: below apices of incisors, 1cm above tip of chin, along midline of chin, direct at center of PSP plate

Question 15

occlusal exposure settings

Answer 15

1 (or possibly 2) exposure settings higher than posterior maxillary periapical exposures

check exposure chart or pre-set exposures on control panel

going through a lot more tissue!!!!!!!* aka need more radiation to get proper density

Question 16

pediatric occlusal radiography

technique

Answer 16

same as adult

Question 17

pediatric occlusal radiography

plate

Answer 17

number 2 intraoral plate