Dental Anatomy Final

1.

1 point

Which is the widest permanent tooth mesiodistally?

Mx 1st molar

Mn 1st molar

Mx 2nd molar

Mn 1st molar

2.

1 point

Overjet is the:

Lateral overlap of maxillary and mandibular incisors

Angle the maxillary incisor makes with the mandibular incisor

Vertical overlap of maxillary and mandibular incisors

Angle the mandibular incisor makes with the maxillary incisor

3.

1 point

Mandibular laterals are 0.5 mm smaller in all dimensions and distoincisal and mesioincisal angle are identical in form. Mn lateral incisor are tipped distally on root, cingulum is distally oriented from midline.

First correct, second incorrect

Both statements true

Both statements false

First incorrect, Second correct

4.

1 point

Which maxillary teeth do not occlude with the tooth that is distal to its mandibular counterpart?

1 and 16

24 and 25

8 and 9

6 and 11

5.

1 point

The pulp canal is the portion of the pulp cavity in the crown of the tooth and the pulp chamber is in the root of the tooth.

Both statements are false

Both statements are true

The first statement is false and the second statement is true

The first statement is true, and the second statement is false

6.

1 point

Primary dentition demonstrates decreased crown convexity in comparison to permanent dentition. Primary teeth also have a smaller crown-to-root length ratio than permanent teeth.

first statement is true, second statement is false.

both statements are false

first statement is false, second statement is true.

both statements are true

7.

1 point

Premature extraction of a tooth can cause the following oral conditions:

all of the above

tilting of adjacent teeth towards extraction site resulting in malocclusion

hypereruption of tooth in opposing arch due to lack of oppositional forces

localized bone resorption in extraction site

8.

1 point

What is the only tooth with a concavity on mesial cervical area, mesial marginal ridge developmental groove, and two roots that bifurcate half way down the root?

Mn 1st Pm

Mn 2nd premolar

Mx 1st premolar

Mx 2nd premolar

9.

1 point

A mandibular tooth will normally occlude with its maxillary counterpart and the tooth immediately distal to it. A maxillary tooth (except 3rd molars) will occlude with its mandibular counterpart and the tooth immediately mesial to it.

The first statement is true and the second statement is false

The first statement is false and the second statement is true

Both statements are true

Both statements are false

10.

1 point

Mandibular third molars occlude with only one other tooth. Mandibular central incisors also occlude with only one other tooth.

both statements are true

first statement is false, second statement is true

first statement is true, second statement is false

both statements are false

11.

1 point

What cells are responsible for the formation of dentin?

Dentoclasts

Odontoblasts

Ameloblasts

Blastocysts

12.

1 point

Which of the following is not a cusp type associated with the second mandibular premolar?

Y

H

U

V

13.

1 point

Maxillary 1st molars usually have 3 roots (two roots buccally and 1 root lingually), while maxillary 2nd premolars usually only have 1 root.

First statement is false, second statement is true

First statement is true, second statement is false

Both statements false

Both statements true

14.

1 point

The primary dentition, when compared with permanent dentition, will have:

A thicker enamel layer

More substantial roots

Similar color and translucency

More flare to the posterior molar roots

15.

1 point

The roots of all teeth are inclined distally. If a single root has two canals, they will be oriented one facial and one lingual.

Both statements are true.

The first statement is true and the second statement is false.

The first statement is false and the second statement is true.

Both statements are false.

16.

1 point

Which teeth are NOT succedaneous?

Permanent 1st, 2nd, 3rd Molars

Permanent Mandibular second premolars

Permanent Mandibular Canines

Permanent Maxillary second premolars

17.

1 point

Which of the following is an important function of embrasures?

Helps stabilize the dental arches by the combined anchorage of all the teeth in either arch in contact with each other

Increases crush/sheer ratio between the posterior teeth and the efficiency of occlusion forces during mastication

Enable proper arch development

Provides a spillway for food during mastication

18.

1 point

The largest incisal embrasure is between which two teeth?

Maxillary central incisor and lateral incisor

Maxillary lateral incisor and canine

Maxillary central incisors

Mandibular lateral incisor and canine

19.

1 point

The oblique ridge, when present, traverses a maxillary molar from the:

Distal buccal cusp to the mesial lingual cusp

Mesial buccal cusp to the distal lingual cusp

Distal lingual cusp to the distal buccal cusp

Mesial buccal cusp to the mesial lingual cusp

20.

1 point

Which teeth have buccal cusp tips that are centralized over the long axis of the tooth?

mandibular first premolar

maxillary first premolar

mandibular second molar

maxillary second premolar

21.

1 point

All posterior teeth have how many line angles?

2

4

6

8

22.

1 point

Which of the following is least likely to have a root furcation?

buccal of the root of the mandibular molar

lingual of the root of a mandibular molar

buccal of the root of the maxillary molar

distal of the root of a mandibular molar

mesial of the root of a maxillary molar

23.

1 point

A cusp of Carabelli is generally found on which tooth?

#2

#6

#3

#4

24.

1 point

How many anterior teeth are in a quadrant?

3

1

2

4

25.

1 point

The cusp of Carabelli is found on what teeth?

2nd Premolars

All molars

Mandibular first molars

Maxillary first molars

26.

1 point

Which tooth is the only tooth with a mesial marginal developmental groove (or depression)?

Mandibular second premolar

Maxillary second premolar

Mandibular first premolar

Maxillary first premolar

27.

1 point

What is dens in dente?

Developmental Defect

Infolding of the outer surface of a tooth.

Tooth within a Tooth

All of the above

28.

1 point

What two teeth occlude with only one other tooth?

Mandibular central incisors & maxillary central incisors

Maxillary central incisors & mandibular canines

Mandibular central incisors & maxillary 3rd molars

Maxillary central incisors & mandibular 3rd molars

29.

1 point

Maxillary right canines are more likely to obtain wear on which region of the tooth?

Mesiocervical slope

Distocervical slope

Distoincisal slope

Mesioincisal slope

30.

1 point

The widest secondary tooth mesiodistally is maxillary 1st molar, while the widest secondary tooth fasciolingually is mandibular 1st molar.

First statement is true, second statement is false

First statement is false, second statement is true

Both statements false

Both statements true

31.

1 point

Which of the premolars frequently lacks a transverse ridge?

Mandibular Second

Maxillary First

Mandibular First

Maxillary Second

32.

1 point

Which of the following maxillary anterior teeth has a mesiodistal crown width that is greater than the incisocervical height?

Canine

Primary central incisor

Lateral incisor

Central incisor

Primary lateral incisor

33.

1 point

Which tooth exhibits a Mesiobuccal groove and a Distobuccal groove?

#22 & #27

#19 & #30

#20 & #29

#3 & #14

34.

1 point

The widest secondary anterior tooth faciolingually is the maxillary central incisor, while the widest secondary anterior tooth mesiodistally is the maxillary canine.

First statement is true, second statement is false

Both statements true

Both statements false

First statement is false, second statement is true

35.

1 point

Shared with the 1st maxillary molar, this tooth also has a distolingual groove.

Maxillary 2nd Molar

Mandible 1st Molar

Maxillary 3rd Molar

Mandible 2nd Molar

36.

1 point

Contact areas become more cervically located from anterior to posterior. Contact areas also increase in size from anterior to posterior.

Both statements are false.

The first statement is false and the second statement is true.

The first statement is true and the second statement is false.

Both statements are true.

37.

1 point

How many primary teeth does a typical 4 year old have

22

16

20

18

38.

1 point

When viewed from either proximal surface, what characteristic helps to distinguish mandibular from maxillary premolars?

The crown profile of maxillary premolars has a heavy lingual inclination.

The crown profile of mandibular premolars has a heavy lingual inclination.

The maxillary premolars exhibit a mesiolingual developmental groove.

The mandibular premolars exhibit a mesial concavity.

39.

1 point

Which premolar has its cusps at a more equal height than any of the others?

Mandible 2nd Premolar

Maxillary 1st Premolar

Maxillary 2nd Premolar

Mandible 1st Premolar

40.

1 point

The clinical crown can be defined as the portion of the tooth extending from the gingival margin to its occlusal edge. The anatomical crown can be defined as the portion of the tooth extending from the cemento-enamel junction to the occlusal edge.

first statement is true, second statement is false.

both statements are true

first statement is false, second statement is true.

both statements are false

41.

1 point

Which tooth is most likely to have anomalies, such as dens in dente, be congenitally missing, peg lateral, microdontia, or is supernumerary?

Mandibular second premolar

Third molars

Maxillary first premolar

Maxillary lateral incisor

42.

1 point

Overbite is the:

Angle the mandibular incisor makes with the maxillary incisor

Lateral overlap of maxillary and mandibular incisors

Angle the maxillary incisor makes with the mandibular incisor

Vertical overlap of maxillary and mandibular incisors

43.

1 point

Erosion is:

The chemical or mechanicochemical destruction of tooth substance (acid reflex, diet)

leads to concavities at the cementoenamel junction of the teeth

The surface of the scooped out area is hard and smooth (unlike caries)

Is not the same as grinding because teeth would be flat

all the above

44.

1 point

What is the characteristic trait seen in Hutchinson’s disease?

Screwdriver shaped crown

Chisel shaped crown

Overly-round shaped crown

Normal shaped crown

45.

1 point

Teeth usually erupt with as many pulp horns as they do cusps, thus maxillary central incisors have only 1 pulp horn.

First statement is false, second statement is true

Both statements true

First statement is true, second statement is false

Both statements false

46.

1 point

The greatest mesio/distal dimension of the pulp chamber in a maxillary incisor is:

At the apex of the root

At the most incisal portion of the pulp chamber

At the anastomosis connecting the buccal and lingual pulp chambers

At the CEJ

47.

1 point

The maxillary 1st premolar has a mesial lingual developmental groove, while the maxillary 1st molar has a mesial marginal developmental groove.

First statement is false, second statement is true

Both statements false

Both statements true

First statement is true, second statement is false

48.

1 point

What are the smallest, most symmetrical teeth in the mouth? Hint: Only teeth to have contact points on the same level.

Mx. first premolar

Mn 2nd PM

Mn laterals

Mn central incisors

49.

1 point

Is the cervical line curvature normally greater on the mesial or distal surface?

Distal

Mesial

Neither

Both

50.

1 point

Which of the following teeth would most likely be congenitally absent?

mandibular first molars

maxillary first molars

maxillary lateral incisors

maxillary central incisors