Tooth Anatomy

Question 1

Distal proximal contacts are always more cervical than mesial contacts EXCEPT for which two teeth?

Answer 1

Mandibular central incisors: contacts at same height

Mandibular 1st premolars: mesial contact is more cervical than distal

Question 2

For anterior teeth most contacts are in the incisal third EXCEPT what tooth?

Answer 2

The DISTAL contact of maxillary lateral incisors and canines are in the middle third

Question 3

What happens to proximal contacts going from anterior to posterior?

Answer 3

The heights of contour move more towards the middle.

Question 4

Which tooth has proximal contact in cervical third?

Answer 4

NONE!!

Question 5

Faciolingually proximal contacts are where?

Answer 5

Anterior: middle third
Posterior: between buccal and middle third

Question 6

T/F: Facial crest of curvature is always in the cervical third.

Answer 6

True

Question 7

Where is the lingual crest of curvature for all anterior teeth?

Answer 7

Cervical third (cingulum)

Question 8

Where is the lingual crest of curvature in posterior teeth?

Answer 8

Middle third

Question 9

Which teeth are less likely to have root depressions?

Answer 9

Maxillary incisors

Question 10

All canines, premolars, and mandibular incisors are likely to have deeper distal surface root depressions than mesial EXCEPT which tooth?

Answer 10

Maxillary first premolar

Question 11

How do you tell how many pulp horns a tooth will have?

Answer 11

Functional cusps

Question 12

Which tooth has a variable amount of pulp horns?

Answer 12

Maxillary lateral incisor (1-3)

Question 13

How many pulp horns are typically on incisors?

Answer 13

3

Question 14

Is the cusp of carabelli considered functional?

Answer 14

No

Question 15

Nearly all teeth are made from 4 lobes EXCEPT for which tooth?

Answer 15

Mandibular 1st molar

Question 16

Where is the distal contact on the maxillary lateral incisor?

Answer 16

In the middle third (due to large distal curvature of the tooth)

Question 17

Where is the mesial contact on the maxillary canine?

Answer 17

At the junction of incisal and middle third

Question 18

Of all anterior teeth, which two create the largest incisal embrasure?

Answer 18

Maxillary lateral incisor and maxillary canine

Question 19

What is the largest cusp of a mandibular first molar?

Answer 19

Mesiobuccal cusp

Question 20

Of maxillary posterior teeth, which crown is the longest?

Answer 20

Maxillary first premolar

Question 21

What is the central fossa line?

Answer 21

The line running between posterior tooth cusps (follows central grooves)

Question 22

Which anterior tooth is most likely to have two root canals?

Answer 22

Mandibular canine

Question 23

Maxillary first premolar lingual cusp occluded only with ________?

Answer 23

Mandibular first premolar due to mesial placement of lingual cusp of maxillary first premolar

Question 24

Where is the lingual crest of curvature on all anterior teeth?

Answer 24

Cervical third

Question 25

Which teeth normally occlude with only one other tooth?

Answer 25

Maxillary third molars Mandibular central incisors

Question 26

T/F: Buccal embrasures are normally larger than lingual embrasures.

Answer 26

FALSE! Lingual embrasures are LARGER than buccal embrasures.

Question 27

T/F: From the distal view, a line connecting the cusp tips of the maxillary arch of teeth exhibit a slight convexity called a curve of Wilson.

Answer 27

FALSE! this is the curve of spee

Question 28

From what view is the curve of wilson seen?

Answer 28

From lingual view

Question 29

When viewed from the facial, which of the following permanent teeth has a mesial cusp ridge longer than its distal cusp ridge?

Answer 29

Maxillary first premolar

Question 30

Which root is widest faciolingually on the maxillary first molar?

Answer 30

Mesiobuccal root

Question 31

What shape do incisors make from the proximal view?

Answer 31

Triangle/wedge

Question 32

Which way does the CEJ curve on the proximal of incisors?

Answer 32

Points at incisal edge

Question 33

Mandibular incisors have incisal edges that are more likely (lingual or facial) to midroot axis?

Answer 33

Lingual

Question 34

What shape is a cross section of a maxillary central incisor root? Other incisors?

Answer 34

Triangular; oval

Question 35

T/F: On all anterior teeth, the mesial CEJ curves more than the distal.

Answer 35

TRUE

Question 36

Where is the largest CEJ curve for all teeth?

Answer 36

Mesial of maxillary central incisor

Question 37

T/F: The maxillary incisors act as a guide for the terminal part of jaw closure.

Answer 37

TRUE

Question 38

Which incisor is normally the narrowest mesio-distally?

Answer 38

Mandibular central incisor

Question 39

Which tooth structure contains the largest hydroxyapatite crystals?

Answer 39

Enamel

Question 40

Which anterior tooth is most likely to have decay in the developmental pit on the lingual surface?

Answer 40

Maxillary lateral incisor

Question 41

What are two major distinctions between maxillary 1st and 2nd molars?

Answer 41

Maxillary 1st much more likely to have cusp of carabeli on mesial lingual cusp Maxillary 2nd will have a much smaller distolingual cusp (sometimes its missing)

Question 42

T/F: All premolars have a buccal crest of curvature more occlusal than the lingual crest of curvature.

Answer 42

FALSE. Buccal is more cervical than lingual

Question 43

What is a distinguishing characteristic of a mandibular canine?

Answer 43

Mesial crown outline is in line with the root

Question 44

T/F: The mesial incisal cusp ridge of the mandibular canine is almost horizontal.

Answer 44

TRUE

Question 45

Which tooth may have a lingual ridge separating two lingual fossae?

Answer 45

Maxillary canine

Question 46

What is the snake eyes tooth?

Answer 46

Mandibular first premolar

Question 47

What is a distinguishing characteristic of a maxillary second premolar?

Answer 47

Short central groove

Question 48

The mesial surface of which tooth is most likely to cause issues with restorative dentistry?

Answer 48

Maxillary first premolar

Question 49

Which tooth may have a mesiolingual groove extending between the mesial marginal ridge and the lingual cusp?

Answer 49

Mandibular first premolar

Question 50

Which premolar is most likely to have a mesial cusp ridge pkt notch?

Answer 50

Mandibular first premolar