Facial Bones Positioning

Question 1

Whats another name for the PA axial view facial bones?

Answer 1

Caldwell method

Question 2

Whats another name for the caldwell method facial bones?

Answer 2

PA axial

Question 3

What structures are seen in a PA axial facial bones (Caldwell method)?

Answer 3

• Orbits are equal distance from the skull borders
• Symmetric petrous ridges lying in the lower /3 of the orbit
• Exaggerated Caldwell= Petrous ridges projected below the inferior margins of orbits

Question 4

How is the patient positioned for a PA axial facial bones (Caldwell method)?

Answer 4

• Patient is prone or upright (upright is best)
• Forehead and nose rest against the table/bucky

Question 5

What do you need to check for accuracy for a PA axial facial bones (Caldwell method)?

Answer 5

Baselines

Question 6

Where is the MSP & OML in a PA axial facial bones (Caldwell method)?

Answer 6

Perpendicular to IR

Question 7

Where is the CR for a PA axial facial bones (Caldwell method)?

Answer 7

Exits at the nasion

Question 8

What angle is the CR for a PA axial facial bones (Caldwell method)?

Answer 8

15 degrees caudal

Question 9

What does the exaggereated caldwell method show?

Answer 9

• Shows the orbital rims
• Petrous ridges are projected below the inferior margins of the orbits

Question 10

What view shows the orbital rims for facial bones w/ the petrous ridges projected below the inferior margins of the orbits?

Answer 10

Exaggerated caldwell

Question 11

What angle is the CR for an exaggerated caldwell for facial bones?

Answer 11

30 degrees caudal

Question 12

What are the structures seen for a parietoacanthial facial bones views (waters method)?

Answer 12

• Distance between the lateral border of the skull and orbit equal on each side
• Petrous ridges below maxillary sinuses
• Demonstrates the maxillae, orbits, and zygomatic arches
• Modified Waters= Petrous ridges projected immediately below the inferior border of the orbits

Question 13

How is the patient positioned for a parietoacanthial facial bones views (waters method)?

Answer 13

• Patient is prone or PA upright (upright is best)
• Chin on bucky/table
• Nose 3/4” from bucky/table

Question 14

Where is the CR for a parietoacanthial facial bones views (waters method)?

Answer 14

Exits the acanthion

Question 15

Where is the OML for a parietoacanthial facial bones views (waters method)?

Answer 15

37 degrees with plane of IR

Question 16

Where is the MML & MSP for a parietoacanthial facial bones views (waters method)?

Answer 16

Perpendicular to the plane of IR

Question 17

What does modified waters of the facial bones do the OML?

Answer 17

Places OML 55 degrees with the plane of IR

Question 18

What structures are seen for a left lateral facial bones view?

Answer 18

• All facial bones in their entirety, with the zygomatic bone in the center
• Almost perfectly superimposed mandibular rami
• Superimposed orbital roofs
• No rotation of sella turcica

Question 19

Where is the CR for a left lateral facial bones view?

Answer 19

Enters lateral surface of the zygomatic bone halfway between the outer canthus and EAM

Question 20

How is the patient positioned for a left lateral facial bones view?

Answer 20

• Patient is prone or upright (upright is best) in LAO
• Head in true lateral position

Question 21

Where is the MSP for a left lateral facial bones view?

Answer 21

Parallel to IR

Question 22

Where is the IP line for a left lateral facial bones view?

Answer 22

Perpendicular to IR

Question 23

Where is the IOML for a left lateral facial bones view?

Answer 23

Perpendicular to front edge of IR

Question 24

Whats another name for the parietoacanthial view of the facial bones?

Answer 24

Waters method

Question 25

Whats another name for the facial bones waters method?

Answer 25

Pareitoacanthial view

Question 26

What breathing technique is used for a PA axial facial bones (Caldwell method)?

Answer 26

Suspended respiration

Question 27

What IR is used for a PA axial facial bones (Caldwell method)?

Answer 27

10x12 portrait

Question 28

What IR is used for a parietoacanthial facial bones views (waters method)?

Answer 28

10x12 portrait

Question 29

What breathing technique is used for a parietoacanthial facial bones views (waters method)?

Answer 29

Suspended respiration

Question 30

What do you see for a modified water view parietoacanthial facial bones?

Answer 30

- OML place 55-degree with plane of IR - Petrous ridges projected immediately below the inferior border of the orbits

Question 31

What breathing technique is used for a left lateral facial bones view?

Answer 31

Suspended respiration

Question 32

What IR is used for a left lateral facial bones view?

Answer 32

10x12 portrait

Question 33

In which view of the facial bones do you see an OML place 55-degree away from plane of IR and the petrous ridges projected immediately below the inferior border of the orbits?

Answer 33

Modified water view of the parietoacanthial view