Exam 1.9: The Occlusal Radiograph Examination

Question 1

What is an occlusal radiograph

Answer 1

An ancillary image which supplements information obtained from PAs

Question 2

What size film is used of an occlusal radiograph

Answer 2

4

Question 3

What are some reasons for prescribing an occlusal image

Answer 3

Localizing foreign bodies
Determination of the precise buccal/lingual location of roots or impacted teeth
Localization of soft tissue calcifications
Trismus patients
Cortical Thinning
Evaluation of the walls of the maxillary sinus

Question 4

Where is the film placed

Answer 4

B/w the occlusal surfaces of the teeth so that the film lies in the plane of occlusion

Tube side of the film is placed toward the jaw being examined

Question 5

What is the patient positioning for an Anterior Maxillary Occlusal Projection

Answer 5

Sitting upright in chair with ala-tragus line parallel to floor

Question 6

What is the film positioning for the anterior maxillary occlusal shot

Answer 6

Slide packet back in mouth until the leading edge touches the raphe bilaterally, have patient gently close

Question 7

What is the cone positioning for the anterior maxillary occlusal shote

Answer 7

Central ray at vertical angulation of 65 degrees through the bridge of the nose

Question 8

What is best visualized by the anterior maxillary occlusal shot?

Answer 8

Anterior palate from canine to canine and nasal fossa

There will be lots of overlap of the posterior teeth

Question 9

What are some pathologies that the anterior maxillary occlusal image is great for

Answer 9

Radiopacity in cleft palate

Odontogenic neoplasm that a PA wouldn’t be able to locate precisely

Question 10

What is the patient positioning for the Posterior Maxillary occlusal radiograph

Answer 10

Sitting upright in the chair, with ala-tragus line parallel to floor

Question 11

What is the film positioning for the PMOR

Answer 11

Insert film white side up centered over the side of the arch of interest, back to the raphe on that side

Question 12

What is the cone positioning for the PMOR

Answer 12

Vertical angulation of 60 degrees through the area of infraortbital foramen

Question 13

What radiograph best visualized the nasolacrimal canals, zygomatic process, anteroinferior maxillary sinus, cortices on the side of interest

Answer 13

Posterior Mx Occlusal Radiograph

Question 14

What are some specific used of the PMOR

Answer 14

Spatial localization of impacted teeth
Demonstrates that there is approximately 2 mm of bone between the tip of the endosseous implant and the floor of the maxillary sinus

Question 15

What is a ground glass texture to expanded posterior ridge a classic sign of?

Answer 15

Fibrous dysplasia

Question 16

What is the patient position for the anterior mandibular occlusal projection

Answer 16

Patient upright in chair with headrest tipped back

Question 17

Whaat is the film positioning for the AMOP

Answer 17

White side down centered over the anterior mandible

Question 18

What is the cone positioning for the AMOP

Answer 18

Central ray -55 degrees through the tip of the chin

Question 19

What projections best visualized the anterior mandible from canine to canine, inferior cortex of anterior mandible, and the genial tubercles

Answer 19

Anterior Mandibular Occlusal Projection

Question 20

What is the patient positioning for the Posterior Mandibular Occlusal Projection

Answer 20

Patient should be in supine position with the headrest back

Question 21

What is the film position for the PMOP

Answer 21

Shift film in packet to affected side

Question 22

What is the cone position for the PMOP

Answer 22

Central Ray should enter at 0 degrees

Perpendicular to film packet

Question 23

What type of radiographs would you use to reveal a sialolith in wharton’s duct

Answer 23

Posterior mandibular occlusal radiograph