Question 1

MATCHING
During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth.
-Maxillary central incisors

Accepted Answer

A)  Facial
B)  No mamelons are visible.
C)  Roots are almost twice the length of crowns.
D)  Resembles the permanent mandibular first molar
E)  Primary tooth that bears least resemblance to another toothF) A) and B)
G) A) and D)

Question 2

The root of the mandibular lateral incisor has a mesial and distal longitudinal grove running in a circular fashion.The mandibular central incisor root does not have any grooves or depressions.

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.E) None of the above
F) B) and C)

Question 3

The largest cusp on the deciduous maxillary second molar is the mesiolingual cusp.

Accepted Answer

A) True 
 B)False

Question 4

Deciduous canines erupt before first molars.

Accepted Answer

A) True 
 B)False

Question 5

Which deciduous molar has three or four cusps,an oblique ridge,three roots,and often has no distal pit (Select all that apply. ) ?

Accepted Answer

A)   Maxillary first
B)   Maxillary second
C)   Mandibular first
D)   Mandibular secondE) B) and C)
F) A) and B) A

Question 6

The deciduous lateral incisors erupt prior to the central incisors.Lateral incisors erupt between 13 and 19 months whereas central incisors erupt between 16 and 22 months.

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.E) B) and C)
F) A) and D)

Question 7

MATCHING
During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth.
-Buccal

Accepted Answer

A)  Facial
B)  No mamelons are visible.
C)  Roots are almost twice the length of crowns.
D)  Resembles the permanent mandibular first molar
E)  Primary tooth that bears least resemblance to another toothF) A) and D)
G) C) and D)

Question 8

Which deciduous root has two canals?

Accepted Answer

A)   Maxillary lateral incisor
B)   Maxillary second molar,mesiobuccal root
C)   Mandibular canine
D)   Mandibular second molar,mesial rootE) A) and B)
F) All of the above

Question 9

At 3 to 4 years of age,the coronal aspect of the root begins to resorb and continues apically until the tooth is shed.The process of shedding the deciduous dentition and replacement by permanent successors is called exfoliation.

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.E) A) and C)
F) B) and C)

Question 10

MATCHING
During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth.
-Maxillary first molar

Accepted Answer

A)  Facial
B)  No mamelons are visible.
C)  Roots are almost twice the length of crowns.
D)  Resembles the permanent mandibular first molar
E)  Primary tooth that bears least resemblance to another toothF) A) and D)
G) B) and E) E

Question 11

The buccocervical ridges on the deciduous molars are quite pronounced.The second molar shows the most prominence.

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.E) None of the above
F) A) and B) B

Question 12

Deciduous maxillary molars have a well-developed cusp of Carabelli.

Accepted Answer

A) True 
 B)False

Question 13

Root trunks of deciduous molars are long.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements accurately describe the deciduous maxillary lateral incisor (Select all that apply. ) ?

Accepted Answer

A)   The crown is smaller than a central incisor's crown.
B)   The root of the lateral incisor appears much longer than its crown.
C)   A common anomaly is that the maxillary lateral incisor appears peg-shaped.
D)   The lateral incisor shows considerable variation in form.
E)   This tooth appears similar to a deciduous central incisor.F) C) and D)
G) B) and C)

Question 15

MATCHING
During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth.
-Primary mandibular second molar

Accepted Answer

A)  Facial
B)  No mamelons are visible.
C)  Roots are almost twice the length of crowns.
D)  Resembles the permanent mandibular first molar
E)  Primary tooth that bears least resemblance to another toothF) C) and D)
G) A) and B)

Question 16

Although it is much smaller,the deciduous maxillary second molar resembles its permanent molar successor because the deciduous maxillary second molar has two equal-sized cusps divided by a buccal groove.

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.F) A) and E)
G) A) and B)

Question 17

Which of the following statements accurately describe the deciduous maxillary first molar (Select all that apply. ) ?

Accepted Answer

A)   This tooth closely resembles the permanent maxillary second premolar.
B)   This tooth is the most atypical of all maxillary molars.
C)   This tooth is the most typical of all maxillary molars,closely resembling deciduous maxillary second molars.
D)   Like all other maxillary molars,this tooth is wider buccolingually than mesiodistally.
E)   The crown may have three or four cusps.F) A) and B)
G) D) and E)

Question 18

Which is the largest root on deciduous maxillary molars?

Accepted Answer

A)   Mesiobuccal
B)   Mesiolingual
C)   Distobuccal
D)   LingualE) None of the above
F) B) and C)

Question 19

Teeth that erupt between 16 and 22 months of age are the deciduous

Accepted Answer

A)   lateral incisors
B)   canines
C)   first molars
D)   second molarsE) A) and D)
F) B) and C)

Question 20

Primary teeth are whiter than their permanent successors.They are smaller in crown dimension but have roots approximately the same size as the permanent dentition.

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.E) A) and B)
F) C) and D)

Exam 16: Deciduous Dentition

MATCHING During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth. -Maxillary central incisors

Correct AnswerverifiedShow Answer

The root of the mandibular lateral incisor has a mesial and distal longitudinal grove running in a circular fashion.The mandibular central incisor root does not have any grooves or depressions.

Correct AnswerverifiedShow Answer

The largest cusp on the deciduous maxillary second molar is the mesiolingual cusp.

Correct AnswerverifiedShow Answer

Deciduous canines erupt before first molars.

Correct AnswerverifiedShow Answer

Which deciduous molar has three or four cusps,an oblique ridge,three roots,and often has no distal pit (Select all that apply. ) ?

Correct AnswerverifiedA

The deciduous lateral incisors erupt prior to the central incisors.Lateral incisors erupt between 13 and 19 months whereas central incisors erupt between 16 and 22 months.

Correct AnswerverifiedShow Answer

MATCHING During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth. -Buccal

Correct AnswerverifiedShow Answer

Which deciduous root has two canals?

Correct AnswerverifiedShow Answer

At 3 to 4 years of age,the coronal aspect of the root begins to resorb and continues apically until the tooth is shed.The process of shedding the deciduous dentition and replacement by permanent successors is called exfoliation.

Correct AnswerverifiedShow Answer

MATCHING During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth. -Maxillary first molar

Correct AnswerverifiedE

The buccocervical ridges on the deciduous molars are quite pronounced.The second molar shows the most prominence.

Correct AnswerverifiedB

Deciduous maxillary molars have a well-developed cusp of Carabelli.

Correct AnswerverifiedShow Answer

Root trunks of deciduous molars are long.

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Which of the following statements accurately describe the deciduous maxillary lateral incisor (Select all that apply. ) ?

Correct AnswerverifiedShow Answer

MATCHING During the mixed dentition,it is often challenging to distinguish deciduous and permanent teeth.While there are many similarities,significant differences exist.Match the descriptive term with its corresponding tooth. -Primary mandibular second molar

Correct AnswerverifiedShow Answer

Although it is much smaller,the deciduous maxillary second molar resembles its permanent molar successor because the deciduous maxillary second molar has two equal-sized cusps divided by a buccal groove.

Correct AnswerverifiedShow Answer

Which of the following statements accurately describe the deciduous maxillary first molar (Select all that apply. ) ?

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Which is the largest root on deciduous maxillary molars?

Correct AnswerverifiedShow Answer

Teeth that erupt between 16 and 22 months of age are the deciduous

Correct AnswerverifiedShow Answer

Primary teeth are whiter than their permanent successors.They are smaller in crown dimension but have roots approximately the same size as the permanent dentition.

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