Deck 11: Periodontium: Periodontal Ligament

Question 1

_______________ is (are)highly cellular,vascular,and neural.

A) Oxytalan fibers
B) Interstitial spaces
C) Periodontal ligaments
D) Fibrous connective tissue

Answer 1

B

Question 2

Which of the following is found on the surface of cementum?

A) Fibroblasts
B) Cementicles
C) Cementocytes
D) Cementoblasts

Answer 2

D

Question 3

The periodontal ligament (periodontium)has a width of _________ mm.

A) 0.015 to 0.038
B) 0.15 to 0.38
C) 0.045 to 0.080
D) 0.45 to 0.80

Answer 3

B

Question 4

The periodontal ligament is composed of fibers,cells,and ___________.

A) synovial fluid
B) visceral fascia
C) crevicular fluid
D) intercellular substance

Question 5

Tooth movement will elicit the ________ of cementum.

A) necrosis
B) ingestion
C) resorption
D) absorption

Question 6

Which gingival fiber group extends between adjacent teeth?

A) Circular
B) Transseptal
C) Free gingival
D) Attached gingival

Question 7

The primary function of the periodontal ligament is to do which of the following?

A) Support the teeth.
B) Provide nutrition.
C) Transmit neural input.
D) Protect the cementum.

Question 8

Osteoclasts arise from which type of cells within the blood vascular system?

A) Polymorphonuclear leukocytes (PMNs)
B) Erythrocytes
C) Monocytes
D) Mast cells

Question 9

Interstitial spaces of the periodontal ligament contain

A) cementum.
B) blood vessels and nerve trunks.
C) alveolar bone.
D) nothing.They are empty spaces left between structures.

Question 10

Which arises from the dental follicular tissue?

A) Dentin
B) Enamel
C) Cementicles
D) Periodontium

Question 11

Which change is associated with the aging of cementum and alveolar bone?

A) Scalloping
B) Cellular hyperactivity
C) Increased cell reproduction
D) Fiber attachments cover the entire surface

Question 12

Which of the following best defines epithelial rests?

A) Diminished functional activity caused by aging.
B) A decrease in the production of epithelial cells.
C) A marking created by deposition of cementum.
D) A mass of cells in the remnants of the root sheath.

Question 13

______________ create and destroy collagen fibers,as needed.

A) Fibroblasts
B) Osteoclasts
C) Macrophages
D) Cementoblasts

Question 14

Which pressure receptors are found in the periodontal ligament?

A) Ruffini
B) Pacinian
C) Meissner
D) All of the above

Question 15

Which are the most numerous cells of the periodontal ligament?

A) Cementoblasts
B) Osteoblasts
C) Fibroblasts
D) Macrophages

Question 16

The periodontal ligament connects with the gingival tissues.

Question 17

The periodontal ligament performs which secondary function?

A) Insulating and protecting the pulp
B) Forming cementum,bone,and enamel
C) Providing a sensory supply to the cementum
D) Supplying nutrients to the cementum and alveolar bone

Question 18

Each of the following objects in the periodontal ligament are phagocytosed by macrophages EXCEPT one.Which one is the EXCEPTION?

A) Dead cells
B) Bacteria
C) Monocytes
D) Foreign bodies

Question 19

Which of the following types of dentoalveolar periodontal ligament fibers extends from the surface of the tooth to the adjacent fundic alveolar bone?

A) Horizontal fiber group
B) Oblique fiber group
C) Apical fiber group
D) Alveolar crest fiber group

Question 20

The jaw jerk reflex is a test for which structure?

A) Pterygoid muscle
B) Trigeminal nerve
C) Periodontal ligament
D) Temporomandibular joint

Question 21

Osteoclasts facilitate bone resorption in periodontal disease.

Question 22

Receptors and nerves located in the periodontal ligament transmit information regarding pressure and mandibular position.

Question 23

The width (thickness)of the periodontal ligament increases with age.

Question 24

The periodontal ligament is thinnest in the midroot zone.

Question 25

The overall general health of an individual affects the health of the periodontium.

Question 26

Epithelial rests always occur along the root surface.

Question 27

Macrophages are normally present in the periodontal ligament.

Question 28

Cemental spikes occur with excessive deposition around depleted fiber bundles.

Question 29

Cementoblasts repair resorbed cementum.

Question 30

The most important function of the periodontal ligament is to sense movement.

Question 31

Cementum is constantly being created as new fibers appear along the root surface.