What should be perpendicular to the IR on a lateral facial bone radiograph?

Letter A in the diagram below of the orbit labels the: orbit(3).jpg

The ethmoid sinuses are made up of air cells, which are divided into _________ groups.

Which of the following is true regarding the lateral projection of the nasal bones? MSP is parallel with the tabletop both sides are done for comparison the interpupillary line is perpendicular to the tabletop

What projection and anatomy is demonstrated in the image below? Axiolateral obl of the mand body – radio.jpg

The sinus identified in the figure below is the: sphenoidal sinus.jpg

The central ray for the modified Waters view of the facial bones exits the __________.

Which muscle, by action, produces furrows between the eyebrows? 1.  The epicranius 2.  The temporalis 3.  The corrugator 4.  The procerus

Wrinkled eyelids caused by reduction of swelling can be treated by

The frontal sinus drains in the _________ nasal meatus.