More Headwork

The mandibular notch is a depression on the mandible located between two structures, the ____ and the _____

• alveolar process, ramus

• ramus, body

• coronoid process, ramus

• coronoid process, condyle

The axiolateral of the mandible demonstrates the side of the mandible that is away or closest to the IR

• further away

• side closest

Which base line is parallel to the floor for a panorex

• OML

• IOML

• AML

• MML

Which sinus is best demonstrated in the Waters projection

• frontal

• maxillary

• ethmoid

• sphenoid

Where is the exit point for a PA Axial Mandible

• lips

• mentum

• acanthion

• nasion

Answer explanation

PA Axial exits at the acanthion,

CR angle 20-25 degrees cephalic, this angle i used to better visualize the head and neck of the condyles.

For a PA mandible, the forehead and nose are against the IR. Which baseline is perpendicular

• OML

• IOML

• AML

• MML

Answer explanation

The OML perpendicular and the CR exits at the lips

Where is the sphenoid sinus located

• A

• B

• C

• D

Answer explanation

A-Frontal sinuses (2)

B- Ethmoid sinuses (many)

C- Maxillary sinuses (2)

D- Sphenoid sinuses (1 or 2)

What is the total amount of CR/head tilt for the axiolateral oblique mandible

• 25

• 30

• 45

• 90

Answer explanation

For the axiolateral a combination of 25 degrees between the head tilt and CR angle

When doing the Rhese projection, where should the optic foramen be located?

• Outer upper quadrant

• Outer lower quadrant

• Inner upper quadrant

• Inner outer quadrant

Answer explanation

The optic foramen should be located in the OUTER LOWER QUADRANT

Older term for the maxillary sinus is called the Antrum of Highmore

• True

• False