DENT 1050 Chapter 21

Question 1

1. What does the term OCCLUSAL refer to?

Answer 1

Chewing surfaces of posterior teeth

Question 2

2. What size receptor is recommended for use with the occlusal technique in the adult patient?

Answer 2

Size 4

Question 3

3. What size receptor is recommended for use with the occlusal technique in the pediatric patient with primary dentition?

Answer 3

Size 2

Question 4

4. How is the patient’s head positioned before exposing a maxillary occlusal receptor?

Answer 4

Position the patient such that the maxillary arch is parallel to the floor

Question 5

5. What are the uses of the occlusal image?

Answer 5

to locate retained roots of extracted teeth; to locate supernumerary, unerupted, or impacted teeth; to locate foreign bodies in the maxilla or the mandible; to locate salivary stones in the duct of the submandibular gland; to locate and evaluate the extent of lesions in the maxilla or the mandible; to evaluate fractures of the maxilla or the mandible; to aid in the examination of patients who cannot open their mouths more than a few millimeters; to examine the area of a cleft palate; to measure changes in the size and shape of the maxilla or the mandible.

Question 6

6. State the vertical angulation used for the maxillary topographic occlusal projection.

Answer 6

+65 degrees

Question 7

7. State the vertical angulation used for the maxillary lateral occlusal projection.

Answer 7

+60 degrees

Question 8

8. State the vertical angulation used for the mandibular topographic occlusal projection.

Answer 8

-55 degrees

Question 9

9. State the vertical angulation used for the mandibular cross-sectional occlusal projection.

Answer 9

90 degrees

Question 10

10. State the vertical angulations used for the maxillary and mandibular pediatric occlusal projections.

Answer 10

maxillary: +60 degrees; mandibular: -55 degrees

Question 11

11. In Figure 21-14, is the labeled amalgam pit buccal or lingual? Why?

Answer 11

Buccal. The vertical angulation of the PID went down but the amalgam went up.

Question 12

12. In Figure 21-15, is the amalgam fragment between the maxillary second and third molars buccal or lingual? Why?

Answer 12

Buccal. The horizontal angulation of the PID went distal but the fragment went mesial.

Question 13

13. In Figure 21-16, is the impacted canine located buccal or lingual to adjacent teeth? Why?

Answer 13

Buccal. The horizontal angulation of the PID went distal but the impacted canine went mesial.

Question 14

14. In Figure 21-17, is the gutta percha in the labeled canal located on the buccal or lingual side of the tooth? Why?

Answer 14

Lingual. The horizontal angulation of the PID went distal and the canal went distal.

Question 15

15. In Figure 21-18, is the impacted canine located buccal or lingual to adjacent teeth? Why?

Answer 15

**Buccal. The horizontal angulation of the PID went mesial and the impacted canine went distal.