Deck 13: Canines

Question 1

Which anterior teeth are widest mesiodistally?

A) Maxillary central incisors
B) Maxillary canines
C) Mandibular lateral incisors
D) Mandibular canines

Answer 1

A
The crown and root of maxillary central incisors have the widest mesiodistal dimension of teeth listed.Note that maxillary canines are only wider in this dimension than mandibular canines by 0.5 mm.

Question 2

Although the labiolingual and mesiodistal widths of the maxillary canine are about equal,the crown is usually wider mesiodistally.Viewed from the incisal aspect,the cusp tip of the maxillary canine is labial and mesial to the center of the crown.

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.

Answer 2

C
Viewed from the incisal aspect,the maxillary canine is slightly wider labiolingually.Also viewed incisally,the cusp tip of the maxillary canine is labial to the center of the crown in a labiolingual direction and mesial to the center mesiodistally.

Question 3

The canine fossa is a depression in the maxillae below the infraorbital foramen.The canine eminence,located on the lingual surface of maxillary canines,separates the mesial and distal lingual fossae.

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.

Answer 3

B
The canine fossa,correctly described in the question,is not visible in the oral cavity.The canine eminence is a bony projection in the maxillae that provides additional support and strength for the root of the maxillary canine.The structure located on the lingual surface of maxillary canines that separates the mesial and distal lingual fossae is the lingual ridge.When the lingual ridge is missing there is only one lingual fossa on the maxillary canine.

Question 4

From the labial aspect the mesial surface of the mandibular canine is more convex than the distal surface because the mesial outline is more straight.

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 5

Compared to their maxillary counterparts,each of the following descriptions of mandibular canines is accurate EXCEPT one.Which one is the EXCEPTION?

A) Mandibular canines resemble maxillary canines in their wedge-shaped outline.
B) A mandibular canine crown length is as long as that of a maxillary canine and sometimes longer.
C) The root of a mandibular canine is often longer than that of a maxillary canine.
D) The lingual surface of a mandibular canine is smoother than that of a maxillary canine.

Question 6

Maxillary and mandibular canines have the same time sequence for their

A) calcification
B) enamel completion
C) eruption
D) root completion

Question 7

Each of the following incorrectly describes the canine eminence EXCEPT one.Which one is the EXCEPTION?

A) Large cingulum
B) Projection of bone
C) Sharp cusp tip
D) Prominent labial ridge

Question 8

Maxillary canines erupt about two years after the mandibular canines.Root formation of maxillary canines is considered complete between 13 and 15 years of age.

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 9

Both maxillary and mandibular canines are more rounded on the distal surface.Their distal contact area is in the incisal third.

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 10

In the illustration below,figure "A" is a

A) maxillary central incisor
B) maxillary lateral incisor
C) mandibular canine
D) maxillary canine

Question 11

A basic difference between canines and incisors is that canines develop from four developmental lobes whereas incisors develop from three.The canines are the most stable teeth in the mouth.

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 12

The canines' stability can be attributed to all of the following factors EXCEPT one.Which one is the EXCEPTION?

A) Root length
B) Large cingulum
C) Canine eminence
D) Location in the dentition

Question 13

Which of the following are true of the root of the maxillary canine (Select all that apply. )?

A) It is usually the longest root in the mouth.
B) In a cross-sectional view it appears to taper from the lingual toward the labial.
C) The apical portion often points mesially but seldom distally.
D) It is very strong and firmly embedded in the maxilla.

Question 14

Although similar in appearance,maxillary and mandibular canines have numerous different landmarks.Both maxillary and mandibular canines have prominent marginal ridges.

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

Compared to maxillary canines,mandibular canines have all of the following EXCEPT one.Which one is the EXCEPTION?

A) Narrower mesiodistal width
B) Smoother lingual surface
C) Flatter cingulum
D) Wider labiolingual width

Question 16

In the illustration below,Figure "B" is a

A) maxillary central incisor
B) maxillary lateral incisor
C) mandibular canine
D) maxillary canine

Question 17

Which of the following accurately describe canines (Select all that apply. )?

A) They are the most stable teeth in the dentition.
B) Their location can only accommodate a short root.
C) The canine eminence is located on the lingual surface coronal to the cingulum.
D) Canines function as holding and tearing tools.
E) Their "V" shape at the corner of the mouth helps dissipate occlusal pressure.

Question 18

The canines are especially efficient at pulverizing food because their double-cuspal arrangement provides assistance to the molars.

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 19

Each of the following is true of the cusp tip EXCEPT one.Which one is the EXCEPTION?

A) When a canine is newly erupted,the cusp tip is shaped like a mamelon.
B) The maxillary cusp tip is labially inclined.
C) The mandibular cusp tip is lingually inclined.
D) Cusps tips can become abraded with wear.

Question 20

The root of the mandibular canine is sometimes bifurcated like the

A) maxillary lateral
B) maxillary canine
C) mandibular lateral
D) None of the above

Question 21

The mesial marginal ridge of the maxillary canine is more developed than the distal marginal ridge.

Question 22

The cusp tip of the maxillary canine is formed by the junction of four ridges.

Question 23

Which statements correctly describe features of canines (Select all that apply. )?

A) The three facial lobes of the maxillary canine resemble the facial lobes of the incisors.
B) Maxillary canines frequently have one pulp horn and one root.
C) Mandibular canines have one pulp horn and can have one or two roots.
D) The cingulum is equally developed on maxillary and mandibular canines.

Question 24

If a lingual ridge is present,there will be two lingual fossae.

Question 25

Mandibular canines usually have a bifurcation in the apical third.

Question 26

The cusp tip of the mandibular canine is located more labially than the cusp tip of the maxillary canine.

Question 27

Mandibular canine roots have proximal root grooves,but maxillary canines do not.

Question 28

The contact areas for the maxillary canine are located in the incisal third.