Deck 14: Periodontium: Cementum, Alveolar Process, and Periodontal Ligament

Question 1

Which of the following statements concerning the oblique group of the periodontal ligament is correct?

A) Part of the gingival fiber group
B) Found only in multirooted teeth
C) Resists intrusive forces to the tooth
D) Resists tilting forces to the tooth

Answer 1

Resists intrusive forces to the tooth

Question 2

On radiographs,the periodontal ligament appears as a:

A) radiopaque line covering the alveolar bone proper.
B) lamina dura surrounding the alveolus.
C) radiolucent space surrounding the alveolus.
D) spongy material between the alveolus and alveolar bone proper.

Answer 2

radiolucent space surrounding the alveolus.

Question 3

Which of the following tissue types is most likely the source of cementogenic cells in adults who have undergone root planning?

A) Bone marrow
B) Periodontal ligament
C) Residual cementum patches
D) Alveolar process

Answer 3

Periodontal ligament

Question 4

The periodontal ligament directly forms from which part of the developing tooth germ?

A) Enamel organ
B) Dental papilla
C) Dental sac
D) Both enamel organ and dental papilla

Question 5

Cellular cementum is most likely found around which of the following root regions?

A) Cervical part of the root
B) Entire root of an unerupted tooth
C) Apical part of the root
D) Furcation region of the root

Question 6

The rests of Malassez are correctly described as:

A) remnants of the outer enamel epithelium.
B) similar to the incremental growth lines in dentin.
C) remnants of Hertwig root sheath.
D) similar to the incremental growth lines in enamel.

Question 7

Which of the following fiber groups is a part of the alveodental ligament on a single-rooted adult tooth?

A) Circular ligament
B) Interdental ligament
C) Gingival fiber group
D) Apical group

Question 8

Which of the following fiber groups of the periodontal ligament does not contribute significantly to each tooth's anchorage in the jaws?

A) Gingival fiber group
B) Interdental fiber group
C) Alveodental fiber group
D) Interradicular fiber group

Question 9

Which of the following terms correctly describes the alveolar bone proper?

A) Lamina propria
B) Cancellous bone
C) Mucoperiosteum
D) Cribriform plate

Question 10

Which of these fiber groups does not have any cemental insertion?

A) Interdental ligament
B) Circular ligament
C) Alveodental ligament
D) Interradicular group

Question 11

The alveolar bone proper of the jaws in a mature adult refers to the:

A) cancellous bone between the alveoli.
B) layer of compact bone lining the alveolus.
C) part of the jaw that houses the teeth.
D) bone surrounding the lamina dura.

Question 12

Which of the following types of dental tissue provides the vascular nutrition for the tooth's cementum?

A) Dentin
B) Epithelial cells
C) Periodontal ligament
D) Alveolar process

Question 13

The anchorage of the tooth to the alveolar process is mediated through which of the following?

A) Interdental ligament
B) Sharpey fibers
C) Oxytalan fibers
D) Both Sharpey and oxytalan fibers

Question 14

The cementoblasts originate during tooth development from which of the following embryonic structures?

A) Enamel organ
B) Dental papilla
C) Dental sac
D) Both enamel organ and dental papilla

Question 15

Which of the following situations can be present at the cementoenamel junction in a mature tooth?

A) Cementum overlaps enamel.
B) Enamel overlaps cementum.
C) Dentin overlaps enamel.
D) Pulp overlaps cementum or dentin.

Question 16

Which of the following structures is not considered part of the periodontium?

A) Alveolar process
B) Cementum
C) Basal bone
D) Periodontal ligament

Question 17

The most common type of connective tissue fiber in the periodontal ligament is which of the following fiber groups?

A) Collagen
B) Elastic
C) Oxytalan
D) Collagen and elastic fibers

Question 18

Which of the following is not a part of the gingival fiber group?

A) Interdental fiber group
B) Circular fiber group
C) Dentoperiosteal fiber group
D) Alveologingival fiber group

Question 19

Sharpey fibers are located in which of the following types of dental tissue?

A) Enamel
B) Dentin
C) Cementum
D) Pulp

Question 20

Which part of both of the jaws contains cancellous bone?

A) Alveolar bone proper
B) Cortical bone
C) Interdental septum
D) Alveolar crest

Question 21

With occlusal trauma,there can be a widening of the:

A) periodontal space.
B) periodontal ligament.
C) lamina dura.
D) periodontal space, periodontal ligament, and lamina dura.

Question 22

Which of the following includes both the supporting soft and hard dental tissue between and including parts of the tooth and surrounding bone?

A) Periodontal ligament
B) Periodontium
C) Alveolar bone proper
D) Alveolar process

Question 23

When many of the cementoblasts become entrapped by the cementum they produce,they become:

A) odontoclasts.
B) odontoblasts.
C) cementocytes.
D) dental sac cells.

Question 24

Which type of bone is only present in an area of anodontia?

A) Cortical bone
B) Basal bone
C) Alveolar bone proper
D) Trabecular bone

Question 25

The most common cell in the periodontal ligament is the:

A) cementoblast.
B) fibroblast.
C) odontoclast.
D) osteoclast.

Question 26

The lamina dura noted on radiographs corresponds to which of the following structures?

A) Basal bone of the both jaws
B) Buccal and lingual cortical plates of the jaws
C) Supporting cancellous bone between the teeth
D) Alveolar bone proper of the alveolar process

Question 27

Which part of the periodontal ligament is noted to be wider in a healthy adult tooth?

A) Near the apex
B) Near the cervix
C) Both near the apex and cervix
D) Between the apex and cervix

Question 28

Which of the following is not visible at least somewhat on bitewing radiographs?

A) Periodontal space
B) Lamina dura
C) Cortical bone
D) Trabecular bone

Question 29

In which part of the alveolar process is the loss of bone from periodontitis first evident?

A) Interradicular bone
B) Basal bone
C) Supporting alveolar bone
D) Alveolar crest

Question 30

The alveolar process between two neighboring teeth is specifically called the _____ bone.

A) interdental
B) basal
C) interradicular
D) trabecular