Question 1

The dental lamina thickens first at the anterior midline.

Accepted Answer

A) True 
 B)False  True

Question 2

The earliest signs of tooth development are seen during the tenth week in utero.

Accepted Answer

A) True 
 B)False  False

Question 3

The successional lamina forms all permanent teeth EXCEPT for one type. Which type is the EXCEPTION?

Accepted Answer

A)  Incisors 
B)  Canines 
C)  Premolars 
D)  Molars 
A)  Incisors 
B)  Canines 
C)  Premolars 
D)  Molars D

Question 4

The cells between the dental papilla and the outer enamel epithelium (OEE) compose the stellate reticulum. Originating from deep layers of the oral epithelium, cells of the stellate reticulum are mesenchymal in origin.

Accepted Answer

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

Question 5

Match between columns
                        Premises: Dental papilla
Enamel organ
Successional lamina
Dental lamina
Dental sac
Vestibular lamina

Accepted Answer

The Answer of Forms mucobuccal fold and Forms enamel and is...

Question 6

The stratum intermedium develops during which stage?

Accepted Answer

A)  Early bud 
B)  Late bud 
C)  Cap 
D)  Bell 
A)  Early bud 
B)  Late bud 
C)  Cap 
D)  Bell

Question 7

The cap stage begins when the concavity of the tooth buds becomes slightly concave.

Accepted Answer

A) True 
 B)False

Question 8

The dental sac is composed of several layers of flat mesodermal cells that partially surround the dental papilla and the enamel organ. The dental sac is another name for the dental lamina.

Accepted Answer

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

Question 9

Each of the following statements accurately describes aspects of the development of the enamel organ EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  Buds from the dental lamina project into deeper underlying connective tissue. 
B)  The bud stage is the first stage in the development of the enamel organ. 
C)  The enamel organ will eventually form the enamel and cementum of teeth. 
D)  Cells in the middle of the buds come from outer layers of oral epithelium. 
E)  Cells in the periphery of the buds come from deep layers of the oral epithelium. 
A)  Buds from the dental lamina project into deeper underlying connective tissue. 
B)  The bud stage is the first stage in the development of the enamel organ. 
C)  The enamel organ will eventually form the enamel and cementum of teeth. 
D)  Cells in the middle of the buds come from outer layers of oral epithelium. 
E)  Cells in the periphery of the buds come from deep layers of the oral epithelium.

Question 10

The enamel organ originates from the

Accepted Answer

A)  Endoderm 
B)  Ectoderm 
C)  Mesoderm 
D)  Ameloblasts 
A)  Endoderm 
B)  Ectoderm 
C)  Mesoderm 
D)  Ameloblasts

Question 11

The first stage of development of the enamel organ is the cap stage.

Accepted Answer

A) True 
 B)False

Question 12

Cells of the outer enamel organ (OEE) constrict and morph into ameloblasts. Stellate reticulum, in conjunction with ameloblasts, is responsible for enamel formation.

Accepted Answer

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

Question 13

The permanent molars develop from successional lamina.

Accepted Answer

A) True 
 B)False

Question 14

The vestibular lamina forms in a lingual direction from the dental lamina.

Accepted Answer

A) True 
 B)False

Question 15

The dental papilla is first seen in the _____ stage.

Accepted Answer

A)  Early bud 
B)  Late bud 
C)  Cap 
D)  Bell 
A)  Early bud 
B)  Late bud 
C)  Cap 
D)  Bell

Question 16

Without thickening of the vestibular lamina in an occlusal direction the vestibule would not exist because clefting or splitting of the epithelium would not occur.

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

The clefting that occurs in the thickened vestibular lamina eventually becomes a mucogingival groove. The vestibular lamina is a thickening of oral epithelium in a lingual direction.

Accepted Answer

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

Question 18

The outermost part of the structure of the cap stage is the outer enamel epithelium (OEE). This tissue, a continuation of the basal layer of oral epithelium, is composed of predominately pyramidal and conical-shaped cells.

Accepted Answer

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

Question 19

The appearance of the stratum intermedium differentiates the cap stage from the bell stage. The stratum epithelium, the fourth layer of epithelium, lies between the inner enamel epithelium and the outer enamel epithelium.

Accepted Answer

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

Question 20

At about the sixth embryonic week, there is a continued thickening in the dental lamina. These localized thickenings correspond to the positions of the twenty teeth of the future primary dentition.

Accepted Answer

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

Exam 19: Dental Lamina and Enamel Organ

The dental lamina thickens first at the anterior midline.

The earliest signs of tooth development are seen during the tenth week in utero.

The successional lamina forms all permanent teeth EXCEPT for one type. Which type is the EXCEPTION?

The cells between the dental papilla and the outer enamel epithelium (OEE) compose the stellate reticulum. Originating from deep layers of the oral epithelium, cells of the stellate reticulum are mesenchymal in origin.

The stratum intermedium develops during which stage?

The cap stage begins when the concavity of the tooth buds becomes slightly concave.

The dental sac is composed of several layers of flat mesodermal cells that partially surround the dental papilla and the enamel organ. The dental sac is another name for the dental lamina.

Each of the following statements accurately describes aspects of the development of the enamel organ EXCEPT one. Which one is the EXCEPTION?

The enamel organ originates from the

The first stage of development of the enamel organ is the cap stage.

Cells of the outer enamel organ (OEE) constrict and morph into ameloblasts. Stellate reticulum, in conjunction with ameloblasts, is responsible for enamel formation.

The permanent molars develop from successional lamina.

The vestibular lamina forms in a lingual direction from the dental lamina.

The dental papilla is first seen in the _____ stage.

Without thickening of the vestibular lamina in an occlusal direction the vestibule would not exist because clefting or splitting of the epithelium would not occur.

The clefting that occurs in the thickened vestibular lamina eventually becomes a mucogingival groove. The vestibular lamina is a thickening of oral epithelium in a lingual direction.

The outermost part of the structure of the cap stage is the outer enamel epithelium (OEE). This tissue, a continuation of the basal layer of oral epithelium, is composed of predominately pyramidal and conical-shaped cells.

The appearance of the stratum intermedium differentiates the cap stage from the bell stage. The stratum epithelium, the fourth layer of epithelium, lies between the inner enamel epithelium and the outer enamel epithelium.

At about the sixth embryonic week, there is a continued thickening in the dental lamina. These localized thickenings correspond to the positions of the twenty teeth of the future primary dentition.

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

Enamel, Dentin, and Pulp

Root Formation and Attachment Apparatus

Eruption and Shedding of Teeth

Oral Mucous Membrane

The Tongue

Salivary Glands

Osteology of the Skull

Nose, Nasal Cavity, and Paranasal Sinuses

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

Temporomandibular Joint

Muscles of Facial Expression

Soft Palate and Pharynx

Arterial Supply and Venous Drainage

Salivary Glands

Nervous System

Lymphatics and Spread of Dental Infection

Filters