Exam #2

Question 1

Total number of primary teeth

Answer 1

20

Question 2

How are primary teeth named?

Answer 2

Letters #A-#T

Question 3

All teeth have combinations of raised or convex areas (_______ anatomy) and depressed or concave areas (_______ anatomy)

Answer 3

positive, negative

Question 4

Which anatomy is formed first, positive or negative

Answer 4

positive- this in turn properly displays the negative anatomy

Question 5

These ridges descend from the tips of the cusps and travel towards the central part of the occlusal surface

Answer 5

triangular ridges

Question 6

What ridges are found ONLY on posterior teeth

Answer 6

triangular ridges

Question 7

How many triangular ridges do posterior tooth cusps have?

Answer 7

only ONE per cusp

Question 8

Triangular ridges are ____ at the base than at the cusp tip

Answer 8

wider

Question 9

When does calcification commence in utero?

Answer 9

13-16 weeks

Question 10

What is the sequence of first evidence of calcification?

Answer 10

Central Incisor> 1st Molar > Lateral Incisor > Canine > 2nd Molar/ premolars > 3rd Molars

Question 11

When have ALL primary teeth initiated calcification

Answer 11

18-20 weeks

Question 12

Primary anterior teeth form from only a ________ center of calcification

Answer 12

single

Question 13

Are mamelons present on deciduous teeth?

Answer 13

no

Question 14

Are developmental depressions found on primary teeth?

Answer 14

no

Question 15

From birth to one year of age, the following permanent teeth are initiating calcification:

Answer 15

1. First molar
2. Central incisor
3. Canine
4. Lateral incisor

Question 16

From 2 to 4 years of age, the following permanent teeth are initiating calcification:

Answer 16

1. Premolars

2. Second molars

Question 17

When have third molars begun calcification?

Answer 17

9 years of age

Question 18

What teeth only have ONE antagonist in the opposing arch?

Answer 18

Mandibular central incisors and Maxillary 3rd molars

Question 19

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

Answer 19

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 20

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

Answer 20

coronal, proximal

Question 21

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 21

lowest, highest

Question 22

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

Answer 22

anterior, molars

Question 23

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 23

mesial, 3.5 (largest), 2.5

Question 24

Circumferential periodontal fibers are located

Answer 24

at the cervical third of the crown and root of a tooth

Question 25

What do circumferential periodontal fibers influence

Answer 25

rotation of a tooth within an alveolus

Question 26

_______ and ______ embrasures are evident from a facial viewpoint

Answer 26

Gingival and incisal/ occlusal

Question 27

Largest embrasure is between ______ and _______

Answer 27

canine and 1st premolar

Question 28

Smallest embrasure is at ______

Answer 28

the midline

Question 29

Above or occlusal to the contract area, embrasures are called ______ in anterior teeth and ______ in posterior teeth

Answer 29

incisal, occlusal

Question 30

What portions of the crown are generally more developed mesial or distal

Answer 30

mesial

Question 31

Which cusps are LARGER

Answer 31

mesial cusps

Question 32

Mesial marginal ridges are usually ______ than distal marginal ridges (What is the exception_

Answer 32

taller, mandibular 1st premolar

Question 33

molars taper in which direction?

Answer 33

mesiodistally

Question 34

All teeth taper ________ except the _______ and the _____

Answer 34

faciolingually except for the maxillary 1st molar and the Y-grooved mandibular 2nd premolar