Quiz # 3-DHY 114 Oral Anatomy

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Questions: 10 | Attempts: 162 | Updated: Mar 16, 2023

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Questions and Answers

1.

Which of the following teeth has a distinct mesial concavity on the root trunk?
- A.
  
  A. maxillary 1st premolar
- B.
  
  B. maxillary 2nd premolar
- C.
  
  C. mandibular 2nd premolar
- D.
  
  D. mandibular 2nd premolar
Correct Answer
A. A. maxillary 1st premolar

Explanation
Chapter 17, page 277 states," permanent premolars present difficulty in instrumentation of the root because they have proximal root concavities, especially on the mesial of the maxillary first premolar".

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2.

Which tooth has a mesiomarginal groove?
- A.
  
  A. maxillary 1st premolar
- B.
  
  B. maxillary 2nd premolar
- C.
  
  C. mandibular first premolar
- D.
  
  D. mandibular 2nd premolar
Correct Answer
A. A. maxillary 1st premolar

Explanation
Chapter 17 p..277, 2nd ed., p..225, 3rd ed. (Table 17-1 Anatomical Information on Permanent Premolars) under Distinguishing right from left states," Maxillary first premolar mesial features: marginal groove".
Ch. 17 p. 228 states, A mesial marginal groove is also sometimes present (Figure 17-13)".

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3.

Which of the premolars has either a H, U, or Y shaped occlusal pattern?
- A.
  
  A. maxillary 1st premolar
- B.
  
  B. maxillary 2nd premolar
- C.
  
  C. mandibular 1st premolar
- D.
  
  D. mandibular 2nd premolar
Correct Answer
D. D. mandibular 2nd premolar

Explanation
See Chapter 17 p. 290 in 2nd ed, pages 236-237 in 3rd ed. Figures 17-29, 17-30 & 17-31 under permanent right second molar for views and descriptions of two and three cusp types of mandibular 2nd premolar.
Read pages 290-291 in 2nd ed., pages 235-236 in 3rd ed.- Occusal Table Components

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4.

Which of the following teeth are characterized by equal sized cusps and a short central groove with many supplemental grooves?
- A.
  
  A. maxillary 1st premolar
- B.
  
  B. maxillary 2nd premolar
- C.
  
  C. mandibular 1st premolar
- D.
  
  D. mandibular 2nd premolar
Correct Answer
B. B. maxillary 2nd premolar

Explanation
Ch 17 p. 283 in 2nd ed., p. 229 in 3rd ed. under Proximal View Features states," the mesial surface of a maxillary second premolar is similar to that of a maxillary first premolat, except that the cusps are closer to being the same size and no mesiomarginal depression".
Ch 17 pg. 284 under Occlusal Table Components states, "The central groove is shorter on a maxillary second premolar than on a maxillary first premolar (Figure 17-18). A maxillary second premolar has numerous supplemental grooves radiating from the central groove".

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5.

Which of the following premolars is characterized by a mesiolingual groove?
- A.
  
  A. maxillary cuspid
- B.
  
  B. maxillary 2nd premolar
- C.
  
  C. mandibular 1st premolar
- D.
  
  D. mandibular 2nd premolar
Correct Answer
C. C. mandibular 1st premolar

Explanation
Chapter 17 p. 286 in 2nd ed., p. 233, 3rd ed. states," The crown outline of the mandibular first premolar is diamond-shaped from the occlusal, with a notch in the mesial outline at the mesiolingual groove (Figure 17-22)

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6.

Which of the following anomalies is not a supernumerary tooth?
- A.
  
  A. dens in dente
- B.
  
  B. distomolar
- C.
  
  C. paramolar
- D.
  
  D. mesiodens
Correct Answer
A. A. dens in dente

Explanation
Chapter 16 p. 252 in 2nd ed., p.203 3rd ed. and Table 6-3 states, The crown of a permanent incisor can be affected with dens in dente (discussed further in Chapter 6 2nd ed.,Table 6-3. D-3rd.edition. This pit may lead to pulpal exposure and pathology. Dens in dente may be hereditary and is more common with a maxillary lateral incisor".

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7.

Amelogenesis imperfecta and dentinogenesis imperfecta are anomalies that:
- A.
  
  A. affect primary and permanent teeth
- B.
  
  B. are hereditary
- C.
  
  C. a and b
Correct Answer
C. C. a and b

Explanation
Chapter 6, page 64 and Figures 6-16 and 6-17 page 80 states," Amelogenesis imperfecta has a hereditary etiology and can affect all teeth of both dentitions'. Dentinogenesis imperfecta, which has a hereditary basis results in blue-grey or brown teeth with an opalescent sheen. The enamel portion is normal but chips off because of a lack of support by the abnormal dentin, leaving dentinal crowns."

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8.

Which of the following anomalies involves "twinning"?
- A.
  
  A. dens in dente
- B.
  
  B. gemination
- C.
  
  C. fusion
- D.
  
  D. Hutchinson's incisors
- E.
  
  E. Mulberry molars
Correct Answer
B. B. gemination

Explanation
Ch.6, page 67, 2nd ed., pg.55, 3rd ed. Table 6-3 Common Dental Developmental Disturbances (Gemination) states," during the Cap Stage of development a large single-rooted tooth with one pulp cavity and exhibits "twinning" in the crown area. Normal number of teeth in dentition. May cause problems in appearance and spacing".

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9.

Which premolars have afunctional lingual cusps?
- A.
  
  A. maxillary
- B.
  
  B. mandibular
Correct Answer
B. B. mandibular

Explanation
Chapter 17, page 285, 2nd ed, p.231, 3rd ed. states, ' The lingual cusp of a mandibular first premolar is usually small and non-functioning. The lingual cusp, then, is similar in appearance to the cingulum found on some maxillary canines, but it can vary considerably".

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10.

Which tooth number replaces "L"?
- A.
  
  A. #20
- B.
  
  B. #21
- C.
  
  C. #28
- D.
  
  D. #29
Correct Answer
B. B. #21

Explanation
#21 Replaces "L".

See Chapter 15- page 234, 2nd ed., p. 189, 3rd ed. Figure 15-1 and Figure 15-2

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Mar 16, 2023

Quiz Edited by
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Sep 03, 2012

Quiz Created by
Flossybossybg

Quiz # 3-dhy 114 Oral Anatomy

Which of the following teeth has a distinct mesial concavity on the root trunk?

Which tooth has a mesiomarginal groove?

Which of the premolars has either a H, U, or Y shaped occlusal pattern?

Which of the following teeth are characterized by equal sized cusps and a short central groove with many supplemental grooves?

Which of the following premolars is characterized by a mesiolingual groove?

Which of the following anomalies is not a supernumerary tooth?

Amelogenesis imperfecta and dentinogenesis imperfecta are anomalies that:

Which of the following anomalies involves "twinning"?

Which premolars have afunctional lingual cusps?

Which tooth number replaces "L"?