Deck 12: Periodontium: Alveolar Process and Cementum

Question 1

Once formed,fibers attached to the cementum cannot change.

Answer 1

False

Question 2

The alveolar process supports the roots of the teeth.

Answer 2

True

Question 3

Which bone is regularly penetrated by collagen fiber bundles?

A) Bundle
B) Cortical
C) Haversian
D) Cancellous

Answer 3

Bundle

Question 4

The alveolar crest is located _______ mm below the dentinoenamel junction.

A) 10
B) 3 to 4
C) 1.2 to 1.5
D) 2.5 to 3.2

Question 5

Which movement is associated with tooth loss or hypereruption?

A) Body
B) Tipping
C) Rotation
D) Mesial drift

Question 6

When a tooth is lost,the adjacent supporting tissues are also lost.

Question 7

Hyalinization of the periodontal ligament is caused by which of the following?

A) Mesial drift
B) Traumatic compression
C) Eruption of permanent teeth
D) Gradual orthodontic movement

Question 8

Which is identified radiographically as the lamina dura?

A) Pulp
B) Cementum
C) Sharpey fibers
D) Alveolar bone proper

Question 9

Which best defines dehiscence?

A) Bone loss in the coronal area of the root
B) Colorless, ischemic periodontal ligament
C) Compact bony lining of the tooth socket
D) Inclination of permanent teeth to drift mesially

Question 10

Maintenance of the alveolar bone and cementum is reliant on which of the following?

A) Resorption
B) Tooth function
C) Routine professional dental care
D) Periods of masticatory inactivity

Question 11

Fenestration is best defined as which of the following?

A) Coronal border of the alveolar process
B) Bone loss in the coronal area of the root
C) Bone loss where the apical root penetrates cortical bone
D) Bundle of collagen fibers embedded in the alveolar bone proper

Question 12

When teeth are moved,all parts of the suspensory apparatus must move simultaneously.

Question 13

Blood vessels and nerves penetrate the lamina dura.

Question 14

The size difference between a primary tooth its permanent successor is the leeway space.

Question 15

Collagen fibers embedded in the alveolar bone proper are called ____________ fibers.

A) alveolar
B) gingival
C) Sharpey
D) transseptal

Question 16

Cemental fiber bundles are usually ________ and _________ than those of the alveolar bone.

A) larger, less numerous
B) larger, more numerous
C) smaller, less numerous
D) smaller, more numerous

Question 17

Bone marrow is the smallest organ in the body.

Question 18

The alveolar crest is ___________ in the molar region.

A) flat
B) peaked
C) rounded
D) scalloped

Question 19

The lamina dura is less dense than the adjacent cancellous bone.

Question 20

Cementum is more susceptible to resorption than bone.Researchers believe that nutritive vascular and neural supplies in cementum are responsible for this increased susceptibility.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 21

Tension and compression during tooth movement result in bone loss.

Question 22

Identify and describe two types of bone loss.

Question 23

Profound change occurs in the dense compact bone of an aging edentulous mandible.

Question 24

Mesial drift is a significant occurrence during the deciduous dentition period.

Question 25

______ ______ penetrate haversian canals at right angles to form a nutrient network.

Question 26

___________ canals pass through the long axis of the bone.

Question 27

Teeth are slightly more mobile in the _______________.

Question 28

Name the two components of the alveolar process.

Question 29

Tooth loss causes loss of periodontal fibers,as well as loss of _______ ________.

Question 30

Aged alveolar bone lacunae are filled with cementocytes.

Question 31

Explain the diagnostic significance of the lamina dura.