Quiz 1 Review

Question 1

What is the Cementoenamel Junction (CEJ)?

Answer 1

Junction or separation between the crown and the root or cementum and enamel

Question 2

What dental surface covers the root?

Answer 2

Cementum

Question 3

What dental surface covers the crown?

Answer 3

Enamel

Question 4

What are lingual heights of contour?

Answer 4

Raised contours on lingual surfaces of posterior teeth

Question 5

What is the anatomical root?

Answer 5

Anatomical root: portion of tooth covered in cementum

Clinical root:

Question 6

Anatomic crown vs. clinical crown

Answer 6

Anatomical crown: portion of tooth covered by enamel

Clinical crown: portion of tooth that is clinically visible, varies with age

Question 7

Where are lingual fossae found?

Answer 7

canines

Question 8

Supplemental (secondary) grooves

Answer 8

1. line on the surface of a posterior tooth that does not divide the primary portions of a tooth
2. Usually not named
3. May not always appear consistently on a posterior tooth
4. Separate a triangular ridge from a cuspal ridge
5. Named according to their location

Question 9

What are irregular depressions or concavities that are unique to the lingual surfaces of canines that divide the lingual fossae of canines into separate mesiolingual and distolingual fossae?

Answer 9

Lingual Fossae

Question 10

What tooth is the last primary tooth to erupt?

Answer 10

maxillary secondary molar (A, J) at 29 months

Question 11

What is the first primary tooth to erupt?

Answer 11

mandibular central incisor (P, O) at 8 months

Question 12

Emersion vs. Eruption

Answer 12

Emersion: stage of tooth development as it first appears through gingiva
Eruption: continuous movement of tooth as it develops from its initial calcification stage until it reaches occlusal contact with a tooth in the opposing arch

Question 13

When does the mixed dentition period begin?

Answer 13

emergence & eruption of the permanent mandibular 1st molar at age 6

Question 14

When does the mixed dentition period end?

Answer 14

loss of the last primary tooth

Question 15

What are the permanent 1st molars guided by?

Answer 15

primary 2nd molars

Question 16

When do permanent teeth begin their eruptive movements?

Answer 16

after the crown has formed

Question 17

What does premature loss of primary teeth lead to?

Answer 17

lack of space for permanent dentition

Question 18

T/F dental neglect, congenital absence, or abnomalies will have an adverse effect on the eruption of permanent dentition

Answer 18

True

Question 19

What is the first tooth to erupt in the maxillary arch?

Answer 19

1st molar

Question 20

What is the order of maxillary tooth eruption?

Answer 20

1st molar 
central incisor 
lateral incisor 
1st premolar 
2nd premolar 
canine
2nd molar 
3rd molar

Question 21

At about 8 years of age what permanent teeth have not yet erupted in the mouth?

Answer 21

permanent 2nd molars
pre-molars
canines

Question 22

What type of arch of alignment do humans have?

Answer 22

partially isognathous: partially symmetrical

Question 23

What teeth have an anterior transverse ridge?

Answer 23

permanent maxillary molars (mainly 1st)

Question 24

What is the anterior transverse ridge confluent with?

Answer 24

mesial marginal ridge, obliterating much of the mesial triangular fossa

Question 25

Which arch is larger?

Answer 25

Maxillary arch

Question 26

Which arch is wider?

Answer 26

Maxillary arch

Question 27

Which arch has more issues with asthetics?

Answer 27

Maxillary arch

Question 28

Which of the tooth in the mandible deviates the least from the vertical axis (proximal reference)?

Answer 28

2nd premolar (6 degrees)

Question 29

Which tooth in the mandible deviates the most from the vertical axis (proximal reference)?

Answer 29

lateral incisor (23 degrees)

Question 30

Which of the tooth in the mandible deviates the least from the vertical axis (facial reference)?

Answer 30

lateral incisor (0 degrees)

Question 31

Which maxillary tooth contact only one tooth on the mandibular arch?

Answer 31

maxillary third molar

Question 32

Which mandibular tooth contact only one tooth on the maxillary arch?

Answer 32

mandibular central incisor

Question 33

Where is midline proximal contact point between?

Answer 33

Incisal third

Question 34

Where is the distal of central?

Answer 34

Junction of incisal and middle thirds

Question 35

What teeth have a 1 mm height of contour?

Answer 35

mandibular molar teeth

Question 36

What tooth deviates the most from the vertical axis (facial reference)?

Answer 36

Second molar (14 degrees)

Question 37

What is the proximal contact area distal of central?

Answer 37

junction of incisal and middle thirds

Question 38

What is the proximal contact area mesial of lateral?

Answer 38

junction of incisal and middle thirds

Question 39

What is the proximal contact area distal of lateral?

Answer 39

middle third

Question 40

What is the proximal contact area mesial of canine?

Answer 40

Junction of incisal and middle thirds

Question 41

What is the proximal contact area distal of canine?

Answer 41

middle third

Question 42

What is the mandibular facial surfaces height of contour?

Answer 42

0.5 mm in the cervical third

Question 43

What is the mandibular anterior teeth lingual surface amount of contour and location?

Answer 43

0.5 mm, cervical third

Question 44

What is the mandibular first premolar teeth lingual surface amount of contour and location?

Answer 44

0.5 mm, middle third

Question 45

What is the mandibular second premolar teeth lingual surface amount of contour and location?

Answer 45

0.75 mm, middle third

Question 46

What is the mandibular molar teeth lingual surface amount of contour and location?

Answer 46

1 mm, middle third

Question 47

Where does the cervical line curve?

Answer 47

in the coronal direction on the proximal surface

Question 48

What is the height of curvature of the cervical line?

Answer 48

measurement from the lowest point at the vertical line to the highest point in the middle of the proximal surface

Question 49

What teeth have the most measurable curvature?

Answer 49

anterior teeth

Question 50

What teeth have the least curvature?

Answer 50

molars

Question 51

On an individual tooth what side has the greatest curvature?

Answer 51

The curvature is always greatest on the mesial surface

Question 52

What is the curvature on the mesial side of the maxillary central?

Answer 52

3.5 mm (largest of all teeth)

Question 53

What is the curvature of the distal side of the maxillary central?

Answer 53

2.5 mm

Question 54

Where does periodontal disease affect the integrity of the periodontal fibers?

Answer 54

level of the cervical line (alveolar crest)

Question 55

What are imbrication lines?

Answer 55

negative anatomy resulting from an overlapping of enamel at the cervical third, run parallel to the cervical line

Question 56

What is perikymata?

Answer 56

positive anatomy that define the imbrication lines

Question 57

Where are imbrication lines and perikymata mostly seen?

Answer 57

permanent maxillary central incisors

Question 58

On mandibular teeth what surface are the contact areas slightly more towards?

Answer 58

facial

Question 59

On mandibular teeth are mesial outlines of crowns more or less curved than distal outline?

Answer 59

mesial outlines are less curved than distal

Question 60

On mandibular teeth are lingual or facial cusps more pointed?

Answer 60

lingual cusps are more pointed

Question 61

On mandibular teeth are mesial or distal cusps larger?

Answer 61

mesial cusps are larger

Question 62

On mandibular teeth are mesial marginal ridges or distal marginal ridges taller?

Answer 62

mesial marginal ridge are taller