Question 1

Which of the following sensations can the nerves of the periodontal fibers transmit (Select all that apply. )?

Accepted Answer

A)  Pain 
B)  Heat 
C)  Cold 
D)  Pressure 
A)  Pain 
B)  Heat 
C)  Cold 
D)  Pressure A,B,C,D

Question 2

Acellular cementum contains trapped cementoblasts because they remain in the matrix after secretion.

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. E

Question 3

The parts of the periodontal ligament embedded in cementum are known as cementocytes.The periodontal fibers surrounded by alveolar bone on the other side of the tooth socket are known as Sharpey's fibers.

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. C

Question 4

When a tooth is moved orthodontically,all of the following should occur EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A)  Tension on periodontal fibers 
B)  Bone resorption 
C)  Bone deposition 
D)  Cementum regeneration 
A)  Tension on periodontal fibers 
B)  Bone resorption 
C)  Bone deposition 
D)  Cementum regeneration

Question 5

Root formation begins at the cementoenamel junction (CEJ)and proceeds to the root apex.During this process,the epithelial root sheath becomes the epithelial diaphragm.

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

The outer layer of cementum is lined with cementoblasts.Cementum has limited ability to form throughout adulthood.

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 7

Which is the most common relationship of the cementum to enamel?

Accepted Answer

A)  Cementum meets enamel at a definite point or junction. 
B)  The cementum and enamel do not meet,exposing a portion of dentin. 
C)  The cementum overlaps enamel. 
D)  Enamel overlaps the cementum. 
A)  Cementum meets enamel at a definite point or junction. 
B)  The cementum and enamel do not meet,exposing a portion of dentin. 
C)  The cementum overlaps enamel. 
D)  Enamel overlaps the cementum.

Question 8

The alveolar bone that forms the tooth socket has a normal periosteum because this bone contains numerous holes that allow for passage of blood vessels.

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 9

The main fiber group for resisting occlusal stress is the

Accepted Answer

A)  interradicular 
B)  apical 
C)  horizontal 
D)  oblique 
A)  interradicular 
B)  apical 
C)  horizontal 
D)  oblique

Question 10

Each of the following are classified as alveolodental fibers EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A)  Alveolar crest fibers 
B)  Horizontal fibers 
C)  Circular gingival fibers 
D)  Oblique fibers 
E)  Apical fibers 
A)  Alveolar crest fibers 
B)  Horizontal fibers 
C)  Circular gingival fibers 
D)  Oblique fibers 
E)  Apical fibers

Question 11

The epithelial diaphragm is parallel to the root sheath.

Accepted Answer

A) True 
 B)False

Question 12

The organic components in cementum are (Select all that apply. )

Accepted Answer

A)  mucopolysaccharides 
B)  hydroxyapatite crystals 
C)  collagen fibers 
D)  mineral salts 
E)  water 
A)  mucopolysaccharides 
B)  hydroxyapatite crystals 
C)  collagen fibers 
D)  mineral salts 
E)  water

Question 13

Enamel pearls (Select all that apply. )

Accepted Answer

A)  are formed by cementocytes 
B)  are usually found in root furcations 
C)  are small elevators of enamel 
D)  dissolve after root completion 
E)  often cause periodontal cysts 
A)  are formed by cementocytes 
B)  are usually found in root furcations 
C)  are small elevators of enamel 
D)  dissolve after root completion 
E)  often cause periodontal cysts

Question 14

Sharpey's fibers are part of the cementum.They are embedded in 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 15

Immediately prior to root formation,the point where layers of outer enamel epithelium (OEE)meet inner enamel epithelium (IEE)is known as the cervical loop.This point is located at the most superficial point of enamel organ.

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 16

Bone undergoes a remodeling process whereas cementum does not because the metabolic rate of bone is lower than that of cementum.

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 17

Each of the following defects can occur during or after the breakup of the epithelial root sheath EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A)  Periodontal cysts 
B)  Accessory root canals 
C)  Hypercementosis 
D)  Enamel pearls 
E)  Epithelial rests of Malassez 
A)  Periodontal cysts 
B)  Accessory root canals 
C)  Hypercementosis 
D)  Enamel pearls 
E)  Epithelial rests of Malassez

Question 18

During the bell stage of root development the cervical loop is located at the deepest part of enamel organ.The cervical loop and the epithelial diaphragm guide the shape and number of roots.

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 19

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

Accepted Answer

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

Question 20

The periodontal ligament develops from the mesodermal cells of the dental sac.

Accepted Answer

A) True 
 B)False

Exam 21: Root Formation and Attachment Apparatus

Which of the following sensations can the nerves of the periodontal fibers transmit (Select all that apply. )?

Acellular cementum contains trapped cementoblasts because they remain in the matrix after secretion.

The parts of the periodontal ligament embedded in cementum are known as cementocytes.The periodontal fibers surrounded by alveolar bone on the other side of the tooth socket are known as Sharpey's fibers.

When a tooth is moved orthodontically,all of the following should occur EXCEPT one.Which one is the EXCEPTION?

Root formation begins at the cementoenamel junction (CEJ)and proceeds to the root apex.During this process,the epithelial root sheath becomes the epithelial diaphragm.

The outer layer of cementum is lined with cementoblasts.Cementum has limited ability to form throughout adulthood.

Which is the most common relationship of the cementum to enamel?

The alveolar bone that forms the tooth socket has a normal periosteum because this bone contains numerous holes that allow for passage of blood vessels.

The main fiber group for resisting occlusal stress is the

Each of the following are classified as alveolodental fibers EXCEPT one.Which one is the EXCEPTION?

The epithelial diaphragm is parallel to the root sheath.

The organic components in cementum are (Select all that apply. )

Enamel pearls (Select all that apply. )

Sharpey's fibers are part of the cementum.They are embedded in alveolar bone.

Immediately prior to root formation,the point where layers of outer enamel epithelium (OEE)meet inner enamel epithelium (IEE)is known as the cervical loop.This point is located at the most superficial point of enamel organ.

Bone undergoes a remodeling process whereas cementum does not because the metabolic rate of bone is lower than that of cementum.

Each of the following defects can occur during or after the breakup of the epithelial root sheath EXCEPT one.Which one is the EXCEPTION?

During the bell stage of root development the cervical loop is located at the deepest part of enamel organ.The cervical loop and the epithelial diaphragm guide the shape and number of roots.

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

The periodontal ligament develops from the mesodermal cells of the dental sac.

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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