terminology

Question 1

when do the deciduous teeth being to form prenatally

Answer 1

14 weeks in utero

Question 2

what are the teeth are found in the deciduous teeth?

Answer 2

20 teeth. 2 incisors, 1 canine, and 2 molars

Question 3

when do the first primary teeth emerge?

Answer 3

6-12 months, generally 8 months

Question 4

when do the last primary teeth emerge?

Answer 4

mean age of 28 +/- 4 months are the maxillary 2nd molars

Question 5

when do the first permanent teeth erupt?

Answer 5

6 years of age

Question 6

what are the first permanent teeth to erupt?

Answer 6

permanent mandibular 1st molars distal to the primary teeth.
(permanent mandibular incisors emerge 1st in some children)

Question 7

what is the eruption of permanent teeth called?

Answer 7

“the transition” or “the mixed dentition”

Question 8

when do the 2nd molar begin to erupt?

Answer 8

12 years old

Question 9

when is the eruption of the permanent teeth generally completed?

Answer 9

14-15 years

Question 10

when are the 3rd molars usually completely erupted?

Answer 10

18-25 years old

Question 11

define maxillary

Answer 11

refers to the upper jaw (maxilla)

Question 12

define mandibular

Answer 12

refers to the lower jaw (mandible)

Question 13

nicknames for primary dentitions?

Answer 13

deciduous and baby teeth

Question 14

nicknames for permanent teeth?

Answer 14

secondary and succedaneous teeth

Question 15

define quadrant?

Answer 15

refers to the division of teeth and mouth into 4 areas: 
upper right (1)
upper left (2)
lower left (3)
lower right (4)

Question 16

what is the primary teeth formula?

Answer 16

I 2 C 1 M 2 = 10

for each mandibular and maxillary

Question 17

what is the permanent formula?

Answer 17

I 2 C 1 P 2 M 3 = 16

Question 18

what is the Zsigmondy/Palmer system?

Answer 18

using number or letter to represent/label the teeth

Question 19

what is the 2-digit system?

Answer 19

numbers, by the 10, are designated to a quadrant of the mouth

Question 20

what is the universal system?

Answer 20

the system used today. counts in order from patient’s top right, counterclockwise, to patient’s bottom right

Question 21

how does one describe a tooth?

Answer 21

what bone
what side of mouth
what type of tooth

Question 22

define clinical crown

Answer 22

part of the tooth that can be seen in the oral cavity

Question 23

define clinical root

Answer 23

part of the tooth that is covered by the gingiva (gums)

Question 24

define anatomical crown

Answer 24

part of the crown that is covered with the enamel

Question 25

define anatomical root

Answer 25

part that is covered with the cementum

Question 26

what are the anatomical root and crown divided by

Answer 26

cervical line or cementoenamel junction (CEJ)

Question 27

what is the apex of the root

Answer 27

tip of the root

Question 28

what is the opening at the root of the apex called

Answer 28

apical foramen

Question 29

which tooth tissues are hard and which are soft

Answer 29

hard: enamel, dentin, cementum
soft: pulp

Question 30

define pulp horn

Answer 30

projections in the roof of the pulp chamber correspond to the major cusps or lobes

Question 31

define pulp chamber

Answer 31

crown portion of a tooth that contains pulp tissues

Question 32

define root canal

Answer 32

the root portion of the tooth that contains the pulp tissue

Question 33

define furacation

Answer 33

area of the multi-rooted tooth where the root divides

Question 34

define root trunk

Answer 34

area of the root between the CEJ and the furcation

Question 35

define alveolar process

Answer 35

portion of the jaw serving as support for the tooth

Question 36

define alveolus

Answer 36

bone of the tooth socket

Question 37

define proximal

Answer 37

towards adjacent teeth

Question 38

define mesial

Answer 38

towards midline

Question 39

define distal

Answer 39

away from midline

Question 40

define facial

Answer 40

towards the face

Question 41

define labial

Answer 41

towards the lip

Question 42

define buccal

Answer 42

towards the cheek

Question 43

define lingual

Answer 43

towards the tongue

Question 44

define palatal

Answer 44

towards the palate

Question 45

define occlusal

Answer 45

chewing surface/surface that comes in contact with opposing tooth

Question 46

define incisal

Answer 46

the cutting surface

Question 47

define radicular

Answer 47

of, relating to, or occurring at the root of a tooth

Question 48

define coronal

Answer 48

of, relating to, or occurring at the crown of the tooth

Question 49

define height of contour

Answer 49

concept used in aspects of restorative dentistry, meaning most prominent part of a tooth

Question 50

what is a boley gauge

Answer 50

• a device used for measuring tooth dimensions
• use parallel beaks whenever possible
• can measure up to the tenth of the millimeter

Question 51

define lobe

Answer 51

primary section of formation in the development of the crown. ex: cusps, cingulum, and mamelons

Question 52

define tubercle

Answer 52

an elevation on the crown produced by an extra formation of enamel

Question 53

what are line angles

Answer 53

• junction of 2 surfaces

- 2 descriptive surfaces should be included

Question 54

what are point angles

Answer 54

• 3 surfaces joined

- listed with 3 descriptive surfaces

Question 55

define embrasures

Answer 55

spillways found between 2 adjacent teeth

ex: facial, lingual, occlusal, incisal

Question 56

function of embrasures

Answer 56

• provide a spillway for food

- prevent food from being formed in the contact areas