Oral Radiology Week 8 Chpt. 23 Review & Images

Front 1

Amalgam and a full metal crown can be distinguished from each other radiographically by their:

a. degree of radiopacity

b. shape of margins

c. location in the mouth

d. use of retention pins

Back 1

b. shape of margins

* Ref. pp. 291-292 *

- Metal crowns will most often appear to have smooth margins, whereas amalgam restorations have irregular margins.

Front 2

Which of these dental restorative materials appear most radiopaque?

a. Amalgam

b. Porcelain

c. Silicate

d. Acrylic resin

Back 2

a. Amalgam

* Ref. p. 291 *

- Amalgam = Radiopaque

- Porcelain = Slightly Radiopaque

- Silicate = Less Radiopaque / Radiolucent

- Acrylic resin = Less Radiopaque / Radiolucent

Front 3

Which of these dental materials is most likely to mimic decay radiographically?

a. Gold

b. Stainless steel

c. Amalgam

d. Composite

Back 3

d. Composite

* Ref. pp. 291-292 *

- Gold, Stainless steel and amalgam are all metal dental restorations and appear radiopaque.

- Composite varies in appearance from radiopaque to radiolucent. When radiolucent, composite may mimic caries.

Front 4

Dens in dente appears radiographically as a:

a. Tiny tooth

b. Large tooth

c. Twin tooth

d. Tooth within a tooth

Back 4

d. Tooth within a tooth

* Ref. p. 295 *

Dens in dente is literally a tooth within a tooth, an invagination of the enamel within the body of the tooth (most frequently in maxillary lateral incisors).

Front 5

A sharp bend in the root is called:

a. taurodontosis

b. hypercementosis

c. dilaceration

d. exostosis

Back 5

c. dilaceration

* Ref. pp. 295, 296 & 300 *

- Taurodontosis is characterized by an elongated pulp chamber and very short roots.

- Hypercementosis is excessive cementum on the roots often causing a bulbous enlargement along the root surface, with the area near the apex appearing most bulbous.

- Delaceration is when the root is misshapen with a sharp bend.

- Exostosis is a localized overgrowth of bone.

Front 6

Radiographically, it is not possible to accurately differentiate between a periapical abscess, a granuloma, and a cyst. Radiographically, it is not possible to accurately differentiate between carcinoma and sarcoma.

a. Both statements are true.

b. Both statements are false.

c. The first statement is true; the second statement is false.

d. The first statement is false; the second statement is true.

Back 6

a. Both statements are true.

* Ref. pp 300-301 *

- Periapical abscesses, granulomas and cysts all appear radiolucent and cannot be distinguished from each other radiographically.

- Carcinomas are malignant tumors of epithelial origin, and sarcomas are malignant tumors of connective tissue origin. The radiographic appearance of these tumors is radiolucent with regular and poorly defined borders.

Front 7

Which of these appears radiolucent on a radiograph?

a. Sialolith

b. Abscess

c. Torus

d. Odontoma

Back 7

b. Abscess.

* Ref. pp. 296-297 & 299-300 *

- Sailoliths are depositions of calcium salts in the salivary glands and ducts that appear radiopaque.

- Abscess is first a barely discernible radiographically when acute, and become more radiolucent as it becomes chronic.

- Torus is an asbestosis near the midline of the palate or on the lingual surface of the mandible, which appear as areas of increased radiopacity

- Odontoma is a tumor consisting of a radiolucent fibrous cyst-like capsule around small, radiopaque misshapen teeth structures.

Front 8

A large radiolucency surrounding the corwn only of an unerupted tooth is most likely what type of cyst?

a. Dentigerous

b. Radicular

c. Residual

b. Pariapical

Back 8

b. Detigerous

* Ref. 297 *

- Detigerous or follicular cyst form around the crowns of imparted or unerupted teeth.

- Peripaical cyst is around the end of the tooth root, and is also known as a radicular cyst. If the cyst is not completely removed, it is then called a residual cyst.

Front 9

The evidence of resorption that appears to shorten the tooth is called:

a. internal resorption

b. external resorption

c. primary resoption

d. secondary resorption

Back 9

b. external resorption

* Ref. pp. 297-298 *

-Internal resorption typically appears as a radiolucent widening of the root chanal.

- External resorption is most often characterized by root-end resorption where the root of the teeth appear shorter than normal.

- There is no primary or secondary resorption in this chapter.

Front 10

The radiographic appearance of a small ovoid radiopacity in the pulp chamber of the tooth is called a:

a. rhinolith

b. phlebolith

c. pulp stone

d. pulp cap.

Back 10

c. pulp stone

* Ref. p 299

- Rhinoliths are stones within the maxillary sinuses

- Phleboliths, or calcified thrombi, are calcified masses observed as round or oval bodies in the soft tissues of the cheeks.

- Pulp stones are small nodules of calcification in the dental pulp.

- There is no pulp cap in this chapter.

Front 11

Which of the following appears as radiolucent in its early stages as a radiopaque mass in its later stages?

a. condensing osteitis

b. periapical granuloma

c. Osteosclerosis

d. Oeriapical cemental dysplasia (PCD)

Back 11

d. Oeriapical cemental dysplasia (PCD)

* Ref. pp. 297 & 299 *

- Condensing osteitis occurs when sclerotic (hardened) bone is formed as a result of infection and is increased radiopacity.

- Periapical Granuloma is a mass of granulated tissue usually surrounded by a fibrous sac continuous iwthin the PDL space and may form a cyst, which is radiolucent.

- Osteosclerosis occurs when regions of abnormally dense bone form NOT as a result of infection and is increased radiopacity.

- Oeriapical cemental dysplasia (PCD), sometimes called cementomas, is a boney displacia derived from the PDL of fully developed/erupted teeth and appears radiolucent early and radiopaque later.

Front 12

Which of the following tumors appears radiolucent radiographically?

a. Torus palatinus

b. Odontoma

c. Sarcoma

Back 12

c. Sarcoma

* Ref. pp. 299-301 *

- Torus Palatinus appears radiopaque.

- Odontoma appears as a radiolucent fibrous capsul around a varous number of radiopaque mishapen toothlike structures.

- Sacromas are milignant tumors of connective tissue that appears radiolucent.

Front 13

Radiographic evidence of a bone fracture appears as radiolucent line that may resemble a:

a. nutrient canal

b. cyst

c. tumor

d. retained root tip

Back 13

a. nutrient canals

* Ref. p. 301 *

Fractures may on occasion have a similar appearance to the nutrient canals described in chapter 22.

Front 14

1

Back 14

Amalgam

Front 15

2

Back 15

Porcelain-fused-to-metal crown

Front 16

3

Back 16

Post and core

Front 17

4

Back 17

Gutta percha

Front 18

5

Back 18

Base material

Front 19

6

Back 19

Full metal Crown

Front 20

7

Back 20

Retention pin

Front 21

8

Back 21

Metal Pontic (Part of the three-unit bridge)

Front 22

1

Back 22

Radiopaque composite

Front 23

2

Back 23

Radiolucent Composite

Front 24

3

Back 24

Porcelain-fused-to-metal crowns

Front 25

4

Back 25

Cement under a crown

Front 26

5

Back 26

Silver point endodontic filler

Front 27

1

Back 27

Amalgam Overhang

Front 28

2

Back 28

Base Material

Front 29

Back 29

Amalgam fragment embedded in soft tissue

Front 30

Back 30

Stainless steel crown

Front 31

1

Back 31

Retention pins

Front 32

2

Back 32

Small amalgam restorations

Front 33

1

Back 33

Endodontic Treatment

Front 34

2

Back 34

Gutta percha

Front 35

3

Back 35

Amalgam Restorations

Front 36

Back 36

External root resorption from trauma due to orthodontic treatment

Front 37

Back 37

Implants

Front 38

1

Back 38

Surgical Wire

Front 39

2

Back 39

Fracture line

Front 40

1

Back 40

Congenitally missing tooth - second premolar didn't develop under primary second molar

Front 41

2 & 3

Back 41

Severe Caries

Front 42

Back 42

Mesiodens - small supernumerary tooth

Front 43

Back 43

Imparted supernumerary premoalr

Front 44

Back 44

Dens in dente

Front 45

Back 45

Hypercementosis

Front 46

Back 46

Fusion of teeth from gemination

Front 47

1

Back 47

Dilaceration

Front 48

2

Back 48

Torus palatinus

Front 49

1

Back 49

Distal Caries

Front 50

2

Back 50

Periapical Lesion - abscess or granuloma

Front 51

1

Back 51

Dentigerous cyst

Front 52

2

Back 52

Impacted 3rd molar

Front 53

3

Back 53

Expansion and thinning of the cortical bone of the mandible

Front 54

1

Back 54

Follicular cyst around crown of unerupted second premolar

Front 55

2

Back 55

incipient caries on first permanent premolar

Front 56

3

Back 56

advanced caries on primary second molar

Front 57

4

Back 57

erupting second premolar

Front 58

4

Back 58

primary first molar about to be exfoliated

Front 59

Back 59

Incisive canal cyst

Front 60

Back 60

Internal resorption - widening of the pulp chamber

Front 61

Back 61

Globulomaxillary cyst

Front 62

Back 62

External (root) resorption

Front 63

Back 63

Retained root

Front 64

Back 64

Condensing osteitis

Front 65

Back 65

Pulp stones

Front 66

Back 66

Osteosclerosis

Front 67

Back 67

Sialolith

Front 68

1

Back 68

Ameloblastoma

Front 69

2

Back 69

External Resorption (root)

Front 70

1

Back 70

Periapical cemental dysplasia - Early stage development

Front 71

2

Back 71

Periapical cemental dysplasia - Late stage development

Front 72

Back 72

Odontoma

Front 73

Back 73

Foreign object - Broken Dental Bur