Question 1

Root formation begins after the full crown has been calcified.

Accepted Answer

A) True 
 B)False

Question 2

The compact bone that is perforated in many places is the

Accepted Answer

A)  cortical plate 
B)  cribriform plate 
C)  bundle bone 
D)  cancellous bone 
A)  cortical plate 
B)  cribriform plate 
C)  bundle bone 
D)  cancellous bone

Question 3

Root sheath cells that remain in the periodontal space are called epithelial rest cells.If they later divide they form epithelial rests of Malassez.

Accepted Answer

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

Question 4

In the two cross-sectional views of alveolar bone depicted below,structure "c" illustrates the

Accepted Answer

A)  spongy bone 
B)  cribriform plate 
C)  cortical plate 
A)  spongy bone 
B)  cribriform plate 
C)  cortical plate

Question 5

By definition,alveolar bone or alveolar process is bone of the upper or lower jaw that comprises the lamina dura for teeth.Bone originates from the mesoderm.

Accepted Answer

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

Question 6

Osteoclasts can resorb bone,cementum,and dentin because their ability to resorb tissues is not specific to any one of these tissues.

Accepted Answer

A)  Both the statement and the reason are correct and related. 
B)  Both the statement and the reason are correct but are NOT related. 
C)  The statement is correct,but the reason is NOT correct. 
D)  The statement is NOT correct,but the reason is correct. 
E)  NEITHER the statement NOR the reason is correct. 
A)  Both the statement and the reason are correct and related. 
B)  Both the statement and the reason are correct but are NOT related. 
C)  The statement is correct,but the reason is NOT correct. 
D)  The statement is NOT correct,but the reason is correct. 
E)  NEITHER the statement NOR the reason is correct.

Question 7

Development of the dentinocemental junction (DCJ)involves newly formed odontoblasts and cementoblasts.The root sheath must separate from the dentinal surface to establish the dentinocemental junction (DCJ).

Accepted Answer

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

Question 8

In the two cross-sectional views of alveolar bone depicted below,structure "a" illustrates the

Accepted Answer

A)  cribriform plate 
B)  cortical plate 
C)  spongy bone 
A)  cribriform plate 
B)  cortical plate 
C)  spongy bone

Question 9

The transseptal fibers run from the cementum into the free and attached gingival area.The alveolodental fibers run from the cementum to the alveolar bone.

Accepted Answer

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

Question 10

Which of the following indicates occlusal trauma?

Accepted Answer

A)  A thickened lamina dura 
B)  A layer of spongy bone 
C)  Pointed (or pyramidal-shaped)interproximal alveolar bone 
D)  Sharpey's fibers in the alveolar bone 
A)  A thickened lamina dura 
B)  A layer of spongy bone 
C)  Pointed (or pyramidal-shaped)interproximal alveolar bone 
D)  Sharpey's fibers in the alveolar bone

Question 11

The cortical plate is typically compact bone with an atypical periosteum.

Accepted Answer

A) True 
 B)False

Question 12

The epithelial root sheath is between the dental papilla and the dental sac in early root development.

Accepted Answer

A) True 
 B)False

Question 13

Bone reacts more favorably to stress than cementum because bone has a higher inorganic content.

Accepted Answer

A)  Both the statement and the reason are correct and related. 
B)  Both the statement and the reason are correct but are NOT related. 
C)  The statement is correct,but the reason is NOT correct. 
D)  The statement is NOT correct,but the reason is correct. 
E)  NEITHER the statement NOR the reason is correct. 
A)  Both the statement and the reason are correct and related. 
B)  Both the statement and the reason are correct but are NOT related. 
C)  The statement is correct,but the reason is NOT correct. 
D)  The statement is NOT correct,but the reason is correct. 
E)  NEITHER the statement NOR the reason is correct.

Exam 21: Root Formation and Attachment Apparatus

Root formation begins after the full crown has been calcified.

The compact bone that is perforated in many places is the

Root sheath cells that remain in the periodontal space are called epithelial rest cells.If they later divide they form epithelial rests of Malassez.

In the two cross-sectional views of alveolar bone depicted below,structure "c" illustrates the

By definition,alveolar bone or alveolar process is bone of the upper or lower jaw that comprises the lamina dura for teeth.Bone originates from the mesoderm.

Osteoclasts can resorb bone,cementum,and dentin because their ability to resorb tissues is not specific to any one of these tissues.

Development of the dentinocemental junction (DCJ)involves newly formed odontoblasts and cementoblasts.The root sheath must separate from the dentinal surface to establish the dentinocemental junction (DCJ).

In the two cross-sectional views of alveolar bone depicted below,structure "a" illustrates the

The transseptal fibers run from the cementum into the free and attached gingival area.The alveolodental fibers run from the cementum to the alveolar bone.

Which of the following indicates occlusal trauma?

The cortical plate is typically compact bone with an atypical periosteum.

The epithelial root sheath is between the dental papilla and the dental sac in early root development.

Bone reacts more favorably to stress than cementum because bone has a higher inorganic content.

Oral Cavity

The Tooth: Functions and Terms

Fundamental and Preventive Curvatures

Dentition

Development, form, and Eruption

Occlusion

Dental Anomalies

Supporting Structures

Clinical Considerations

Tooth Identification

Root Morphology

Incisors

Canines

Premolars

Molars

Deciduous Dentition

Basic Tissues

Development of Orofacial Complex

Dental Lamina and Enamel Organ

Enamel, Dentin, and Pulp

Eruption and Shedding of Teeth

Oral Mucous Membrane

The Tongue

Histology of the Salivary Glands

Osteology of the Skull

Nose, Nasal Cavity, and Paranasal Sinuses

Muscles of Mastication, Hyoid Muscles, and Sternocleidomastoid and Trapezius Muscles

Tempo-romandibular Joint

Muscles of Facial Expression

Soft Palate and Pharynx

Arterial Supply and Venous Drainage

Salivary Glands

Nervous System

Lymphatics and Spread of Dental Infection

Anatomical Considerations of Local Anesthesia

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