Modern Dental Assisting 10th Edition By Doni L. Bird – Test Bank
Chapter 11: Overview of the Dentitions
Test Bank
MULTIPLE CHOICE
1. There are _____ teeth in the primary dentition.
a. 24 c. 20
b. 32 d. 28
ANS: C
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A The number of teeth in the primary dentition is not 24.
B The number of teeth in the primary dentition is not 32.
C The first set of 20 teeth is called the primary dentition or deciduous dentition.
D The number of teeth in the primary dentition is not 28.
PTS: 1 DIF: Easy REF: p. 141 TOP: Dentition Periods
2. The mixed dentition period begins with:
a. eruption of the first permanent tooth.
b. eruption of the first permanent maxillary central incisor.
c. loss of the first primary central incisor.
d. loss of the first primary molar.
ANS: A
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A The mixed dentition period begins with eruption of the first permanent tooth.
B The mixed dentition period begins with eruption of the first permanent tooth (more general), rather than eruption of the first permanent central incisor (more specific). Usually permanent first molars and mandibular central incisors erupt before permanent maxillary central incisors.
C The mixed dentition period begins with eruption of the first permanent tooth, rather than loss of the first primary central incisor.
D The mixed dentition period begins with eruption of the first permanent tooth, rather than loss of the first primary molar.
PTS: 1 DIF: Medium REF: p. 141 TOP: Mixed Dentition
3. There are _____ succedaneous teeth.
a. 32 c. 12
b. 24 d. 20
ANS: D
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A The number of succedaneous teeth is not 32.
B The number of succedaneous teeth is not 24.
C The number of succedaneous teeth is not 12.
D There are 20 succedaneous teeth (permanent teeth that replace the primary teeth), the same as the number of teeth in the primary dentition.
PTS: 1 DIF: Difficult REF: p. 141 TOP: Dentition Periods
4. The permanent dentition period begins at about 12 years of age when the:
a. last primary tooth is lost. c. third molars come in.
b. 12-year molars erupt. d. jaws stop growing.
ANS: A
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A The mixed dentition stage ends, and the permanent dentition period begins, when the last primary tooth is lost. This usually happens at about 12 years of age.
B Primary teeth may still be present in the mouth when the 12-year molars erupt.
C The third molars may erupt several years after the loss of the last primary tooth.
D The growth of the jaw is not a contributing factor in differentiating the dentition periods.
PTS: 1 DIF: Medium REF: p. 142 TOP: Permanent Dentition
5. The human mouth is divided into two sections, or arches, called the:
a. quadrants. c. mandibular arch.
b. maxillary arch. d. b and c.
ANS: D
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A The quadrants include four parts: the two halves of the maxillary arch and the two halves of the mandibular arch.
B The maxillary arch is one of the two sections.
C The mandibular arch is one of the two sections.
D The maxillary arch and mandibular arch are the two sections of the mouth.
PTS: 1 DIF: Easy REF: p. 142 TOP: Dental Arches
6. The mouth can be divided into four sections called:
a. arches. c. quadrants.
b. sextants. d. dentitions.
ANS: C
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A The arches consist of two sections: the maxillary and the mandibular.
B A sextant refers to one sixth of the dentition.
C The maxillary and mandibular arches are each divided into halves; the resulting four sections are called quadrants.
D The mouth will have two dentitions: the primary and the permanent.
PTS: 1 DIF: Easy REF: pp. 142-143 TOP: Quadrants
7. The anterior teeth include the:
a. premolars. c. canines.
b. incisors. d. b and c.
ANS: D
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A The premolars are posterior teeth.
B The central incisors and lateral incisors are two of the three types of anterior teeth.
C The canines are one of the three types of anterior teeth.
D The incisors and canines make up the anterior teeth.
PTS: 1 DIF: Medium REF: p. 143 TOP: Anterior and Posterior Teeth
8. The four types of teeth are _________, and molars.
a. incisors, canines, premolars c. centrals, laterals, premolars
b. incisors, cuspids, canines d. centrals, canines, bicuspids
ANS: A
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A The four types of teeth found in the adult dentition are incisors, canines, premolars, and molars.
B Cuspids and canines are two names for the same type of tooth. Premolars are the fourth type of tooth.
C Centrals and laterals are the two types of incisors. Canines are the fourth type of tooth.
D Centrals are a type of incisor. Premolars (not bicuspids) are the fourth type of tooth.
PTS: 1 DIF: Medium REF: p. 143
TOP: Types and Functions of Teeth
9. _____ are the longest teeth in the human dentition and are used for cutting and tearing.
a. Incisors c. Molars
b. Canines d. Premolars
ANS: B
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A Incisors have a shorter crown-root length than the canines.
B The canines are used for cutting and tearing and are the longest teeth in the human dentition. They are sometimes known as the cornerstone of the dental arch.
C Molars have a shorter crown-root length than the canines.
D Premolars have a shorter crown-root length than the canines.
PTS: 1 DIF: Easy REF: p. 143 TOP: Canines
10. _____ are used for chewing and grinding food.
a. Molars c. Premolars
b. Canines d. Both a and c
ANS: D
Feedback
A Molars are one of two types of teeth used for chewing and grinding food.
B Canines are used for cutting and tearing.
C Premolars are one of two types of teeth used for chewing and grinding food.
D The molars and premolars are used for chewing and grinding food.
PTS: 1 DIF: Medium REF: p. 143
TOP: Types and Functions of Teeth
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