Deck 12: Periodontium: Alveolar Process and Cementum

Question 1

Which is identified radiographically as the lamina dura?

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

Answer 1

D

Question 2

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

Answer 2

D

Question 3

Adult periodontitis causes loss of periodontal ligament (PDL)fibers as well as loss of

A) cementum.
B) alveolar bone.
C) enamel.
D) dentin.

Answer 3

B

Question 4

The area of bone loss where an apical root penetrates the cortical bone is called a

A) fenestration.
B) dehiscence.
C) marginal defect.
D) lateral fossa.

Question 5

Loss of density of lamina dura is associated with each of the following EXCEPT one.Which one is the EXCEPTION?

A) Infection
B) Inflammation
C) Resorption of the bony socket
D) Bruxing

Question 6

Teeth are slightly more mobile in the

A) morning.
B) early afternoon.
C) late afternoon.
D) evening.

Question 7

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 8

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 9

Which type of nutrient canals extend through the long axis of bone?

A) Haversian
B) Volkmann
C) Trabecular
D) Cancellous

Question 10

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

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

Question 11

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 12

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 13

The alveolar process is composed of alveolar bone proper and the

A) teeth.
B) gingiva.
C) supporting bone.
D) vermilion border.

Question 14

Which bone is regularly penetrated by collagen fiber bundles?

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

Question 15

The alveolar crest is ___________ in the molar region.

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

Question 16

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 17

Which movement is associated with tooth loss or hypereruption?

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

Question 18

Once formed,fibers attached to the cementum cannot change.

Question 19

The type of nutrient canals that penetrate Haversian canals at right angles to form a nutrient network are called

A) hyalinized.
B) reversal lines.
C) Volkmann.
D) Haversian.

Question 20

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 21

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

Question 22

Tension and compression during tooth movement result in bone loss.

Question 23

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

Question 24

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

Question 25

Bone marrow is the smallest organ in the body.

Question 26

Blood vessels and nerves penetrate the lamina dura.

Question 27

The alveolar process supports the roots of the teeth.

Question 28

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

Question 29

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

Question 30

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

Question 31

Aged alveolar bone lacunae are filled with cementocytes.