Quiz #1

Question 1

What is the junction or separation between the crown and the root called?

Answer 1

Cementoenamel junction (CEJ, Cervical Line)

Question 2

____ covers the root while ____ covers the crown.

Answer 2

Cementum, enamel

Question 3

On the lingual surfaces of posterior teeth, the raised or convex contours ____ (are/are not) called ridges. Their official name is ____. These contours on the lingual surface ____ (are/are not) in the cervical part of the crown.

Answer 3

are not, Lingual Heights of Contour, are not

Question 4

____ are irregular depressions or concavities that are unique to the lingual surfaces of canines. They divide the lingual fossa of canines into separate ____ and ____ fossae.

Answer 4

Lingual Fossae on canines, mesiolingual, distolingual

Question 5

____ are lines on the surface of a ___ tooth that ___ (does/does not) divide the primary portions of a tooth.

Answer 5

Supplemental (secondary) grooves, posterior, does not

Question 6

Supplemental grooves will usually not be ___ because they may not always consistently appear on the surface of the tooth. Many times, they will separate ____ ridges from ___ ridges on the same cusp.

Answer 6

named, triangular, cuspal

Question 7

If present, supplemental grooves are named according to their ___.

Answer 7

location

Question 8

The last primary tooth to erupt is ___ (tooth number ___) at ___ months.

Answer 8

Maxillary 2nd Molar (M2), A, J, 29 months

Question 9

The first primary tooth to erupt is ___ (tooth number ___) at ___ months.

Answer 9

Mandibular central incisor, P, O, 8 months

Question 10

At __ months of age, all of the primary teeth have emerged except for the second molars.

Answer 10

20

Question 11

The ____ dentition period begins with the emergence and eruption of the permanent mandibular 1st molar at age ___.

Answer 11

transitional “mixed”, age 6

Question 12

The “Mixed Dentition Period” ends with the loss of the last primary tooth, either the ____ or usually the ___ at age ___.

Answer 12

maxillary canine, maxillary second molar, age 11-12

Question 13

The permanent 1st molars are guided by and emerge ____ to the primary 2nd molars.

Answer 13

distal or posterior

Question 14

Premature loss of primary teeth may lead to a lack of ___ for the permanent dentition.

Answer 14

space

Question 15

What 3 things will have an adverse effect on the eruption of the permanent dentition?

Answer 15

Dental neglect, congenital absence, anomalies

Question 16

What is the order of eruption of Maxillary Permanent Teeth?

Answer 16

1. 1st Molar (3, 14)
2. Central (8, 9)
3. Lateral (7, 10)
4. 1st Premolar (5, 12)
5. 2nd Premolar (4, 13)
6. Canine (6, 11)
7. 2nd Molar (2, 15)
8. 3rd Molar (1, 16)

Question 17

The maxillary ___ lag in eruption compared to the remaining maxillary ___ teeth and maxillary ___.

Answer 17

canines, anterior, premolars

Question 18

At 8 years of age, the dentition begins to appear “normal.” What permanent teeth are still not erupted?

Answer 18

Permanent 2nd Molars, premolars, canines

Question 19

Humans have an arch alignment that is considered ____ and is defined as being ___.

Answer 19

partially isognathous, there is a degree of symmetry but not perfectly symmetrical.

Question 20

Anterior Transverse Ridge is exhibited only on permanent ___ and is confluent with the ___, obliterating much of the ___ fossa.

Answer 20

maxillary molars, mesial marginal ridge, mesial triangular fossa

Question 21

The ___ arch form dominates or influences the ___ arch form for 3 reasons. They are:

Answer 21

Maxillary, mandibular

1. Maxillary is larger
2. Maxillary is wider
3. Esthetically it is more visible/important

Question 22

The tooth with the most deviation from the vertical axis in the proximal view is exhibited in the ___ at an angle of __.

Answer 22

Lateral Incisor, 23 degrees

Question 23

The tooth with the least deviation from the vertical axis in the proximal view is exhibited in the ___ at an angle of __.

Answer 23

Second Premolar, 6 degrees

Question 24

What are the 3 items to note on occlusal antagonists in the opposing arch?

Answer 24

1. Teeth primarily contact their namesakes in the opposing arch.
2. Most teeth contact one additional tooth in the opposing arch
3. The Maxillary 3rd Molar and the mandibular central incisors are the exceptions (They have only 1 antagonist)

Question 25

From the midline out, what are the proximal contact areas of each tooth?

Answer 25

Midline: Incisal Third Distal of Central: Junction of Incisal and Middle thirds Mesial of Lateral: Junction of Incisal and Middle thirds Distal of Lateral: Middle third Mesial of Canine: Junction of Incisal and Middle thirds Distal of Canine: Middle third

Question 26

For the height of contour of the mandibular arch: | All facial surfaces = __ mm located in the ____.

Answer 26

0.5, cervical third

Question 27

For the height of contour of the mandibular arch: | Mandibular anterior teeth lingual surface amount of contour and location = __ mm located in the ____.

Answer 27

0.5, cervical third

Question 28

For the height of contour of the mandibular arch: | Mandibular first premolar teeth lingual surface amount of contour and location = __ mm located in the ____.

Answer 28

0.5, middle third

Question 29

For the height of contour of the mandibular arch: | Mandibular second premolar teeth lingual surface amount of contour and location = __ mm located in the ____.

Answer 29

0.75, middle third

Question 30

For the height of contour of the mandibular arch: | Mandibular molar teeth lingual surface amount of contour and location = __ mm located in the ____.

Answer 30

1.0, middle third

Question 31

The cervical line curves in a ___ direction on the ___ surface.

Answer 31

coronal, proximal

Question 32

The measurement of the height of the curvature of the cervical line is from the ___ point to the ___ point in the middle of the proximal surface.

Answer 32

lowest, highest

Question 33

The ___ teeth have the most measurable curvature. The ___ have little or no curvature.

Answer 33

anterior, molars

Question 34

On an individual tooth, the curvature is always greatest on the ___ side. The mesial of the maxillary central is __ mm. The distal of maxillary central is __ mm.

Answer 34

mesial, 3.5 (largest), 2.5

Question 35

____ will affect the integrity of the periodontal fibers at level of the cervical line (circumferential, alveolar crest, transseptal, horizontal and oblique) and lead to a degradation of the crest of the alveolar bone.

Answer 35

Periodontal disease

Question 36

____ are the negative anatomy resulting from an overlapping of enamel at the cervical third. They run parallel to the cervical line.

Answer 36

Imbrication lines

Question 37

____ are positive anatomy or the actual enamel ridges that define the imbrication lines.

Answer 37

Perikymata

Question 38

imbrication lines and perikymata are mostly seen on permanent ___.

Answer 38

maxillary central incisors

Question 39

In the mandibular arch, contact areas are both slightly more to the ____. ____ outlines of crowns are less curved than ____ outlines. ____ cusps are more pointed than ____ cusps. ____ cusps are larger than ____ cusps. ____ marginal ridges are taller than ____ marginal ridges.

Answer 39

``` facial Mesial, distal Lingual, facial Mesial, distal Mesial, distal ```