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

What projection (method) of the paranasal sinuses, is demonstrated in the image below ? PA Waters image.jpg

For a lateral projection of the orbit, the CR enters __________.

Which two facial bones form the roof of the mouth? (Select the two that apply.)

Which border of the vomer bone is considered free?

Which of the following are included as believed functions of the sinuses? 1. Decrease the weight of the skull.2. Warm and moisten inhaled air.3. Provide a resonating chamber for voice.

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

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

The part of the mandible indicated below is body of mandible.jpg

The opening underneath the alveolar portion of the mandible for the passage of blood vessels and nerve is called _________.