Deck 1: Anatomy of the Periodontal Structures: the Healthy State

Question 1

Which of the following terms also refers to the dentogingival unit?

A)Junctional epithelium + gingival fibers
B)Sulcular depth + sulcular epithelium
C)Periodontal ligament + gingival fibers
D)Periodontal ligament + biologic width

Answer 1

Junctional epithelium + gingival fibers

Question 2

The bone that lines the tooth socket is referred to as

A)lamina propria.
B)lamina dura.
C)trabecular bone.
D)radibular bone.
E)cancellous bone.

Answer 2

lamina dura.

Question 3

Healthy gingival tissues are considered to be firm and resilient because the main component of the gingival connective tissue is about 60% collagen fibers.

A)Both statement and reason are correct.
B)Both statement and reason are incorrect.
C)The statement is correct, but the reason is incorrect.
D)The statement is incorrect, but the reason is correct.

Answer 3

Both statement and reason are correct.

Question 4

Which of the following fibers function to resist the forces of pulling out and tipping of a mandibular molar?

A)Interradicular
B)Intraradibular
C)Oblique
D)Horizontal
E)Transseptal

Question 5

All of the following are considered part of the attachment apparatus except one. Which one is the exception?

A)Oral epithelium
B)Alveolar bone
C)Periodontal ligament
D)Cementum

Question 6

Which of the following periodontal ligament fibers is last to develop?

A)Oblique
B)Horizontal
C)Apical
D)Circular
E)Dentogingival

Question 7

Which of the following substances/cells is found in the gingival epithelium?

A)Keratin
B)Collagen
C)Fibroblasts
D)Collagenase

Question 8

Collagen has been found in many types of body tissue. In which of the following oral tissues is collagen not found?

A)Enamel
B)Epithelium
C)Bone
D)Cementum

Question 9

Which of the following definitions is correct for the junctional epithelium?

A)Connective tissue structure involved in the attachment of the gingiva to the tooth
B)Connective tissue that functions to hold the gingiva against the tooth and bone
C)Epithelial tissue contributing to the adherence of the soft tissue to the tooth
D)Epithelial tissue functioning to protect the underlying oral structures and acting as a mechanical barrier

Question 10

Which of the following structures represents the fusion of the interproximal junctional epithelia of two adjacent posterior teeth?

A)Fenestration
B)Col
C)Papilla
D)Frenum
E)Bone

Question 11

Which of the following definitions refers to Sharpey's fibers?

A)Directly embedded into alveolar bone and cementum
B)Running from alveolar bone and inserting into the cementum
C)Originating from the crest of the interradicular bone and inserting into the furcation area
D)Extending from the cementum into the free gingiva

Question 12

Which of the following statements pertains to the function of the periodontal ligament fibers?

A)They support and give contour to the attached gingiva.
B)They transmit occlusal forces to the bone.
C)They protect the interproximal bone from inflammation.
D)They anchor the tooth to the gingival tissues.
E)They attach the gingiva to the alveolar bone.

Question 13

Which of the following features is characteristic of cementum?

A)Contains many blood vessels
B)Contains a good supply of nerves
C)Periodontal ligament fibers attach to it
D)Surface is hard

Question 14

Which of the following oral structures is considered to be a semipermeable membrane?

A)Oral epithelium
B)Lamina propria
C)Periodontal ligament
D)Junctional epithelium
E)Sulcular epithelium

Question 15

Which of the following structures is responsible for holding the free gingiva in close contact with the tooth?

A)Periodontal ligament fibers
B)Circular fibers
C)Lamina propria
D)Oral epithelium

Question 16

All of the following structures are composed of collagen except one. Which one is the exception?

A)Sulcular epithelium
B)Principal fibers
C)Gingival fibers
D)Cementum
E)Alveolar bone

Question 17

Which of the following cells are responsible for the synthesis of collagen?

A)Keratinocytes
B)Mast cells
C)Fibroblasts
D)Plasma cells
E)Lymphocytes

Question 18

Which of the following cells are responsible for synthesizing bone?

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

Question 19

The alveolar crest is parallel to a line connecting the

A)cusp tip.
B)root prominence.
C)cementoenamel junctions.
D)alveolar crest.
E)periodontal ligament.

Question 20

Which of the following features occurs with aging?

A)Increased cementum thickness
B)Decreased cementum thickness
C)Increased number of cells in the periodontal ligament
D)Increased vascularity of connective tissue

Question 21

Horizontal fibers connect the alveolar bone proper with the ________.

Question 22

List and explain the functions of the principal fibers.

Question 23

The gingival epithelium is ________ and relies upon the underlying lamina propria for its nutrients.

Question 24

What is the function of the gingival connective tissue attachment (fibers)?

Question 25

Cementum does not contain blood vessels and thus is considered to be ________.

Question 26

The gingival crevice is the space between the free gingiva and the ________.

Question 27

The junctional epithelium is composed of ________ stratified squamous epithelium.

Question 28

What are the clinical features of gingival versus alveolar mucosa?

Question 29

The most coronal part of the free gingiva is the ________.

Question 30

Explain the differences between gingival epithelium and gingival connective tissue.