Nbde Dental Anatomy Primary

Front 1

Which teeth are wider mesiodistally and shorter incisocevically in the crown?
Primary/Permanent

Back 1

Primary

Front 2

Which crowns are longer and wider mesiodistally at the cervical third of the crown?
Primary/Permanent

Back 2

Permanent

Front 3

Which roots taper more rapidly?
Primary/Permanent

Back 3

Primary

Front 4

Which roots are shorter and wider?
Primary/Permanent

Back 4

Permanent

Front 5

Which kind of tooth has enamel ending abruptly at the cervical line, rather than becoming thinner?
Primary/Permanent

Back 5

Primary

Front 6

What is special about the shape of the Primary first molar?

Back 6

Its anatomy is unlike any other tooth in the mouth

Front 7

What is the general shape of the primary first molar?
How many cusps?
Order of cusp size?

Back 7

Oval
4
MB - ML - DB - DL

Front 8

What surface is longer on a primary first molar?

Back 8

Buccal longer than lingual
Cervical ridge accross gingiva

Front 9

What are the characteristics of the primary first molar roots?

Back 9

2
mesial longer and wider than distal
Apex of mesial is flattened/squared off

Front 10

What is the shape of the occlusal table of the primary first molar?

Back 10

rhomboid

Front 11

What is the angle shape of the primary first molar on the MB from the occlusal surface?

Back 11

Acute angle

Front 12

What is the angle of the DB region of the occlusal surface of the primary first molar?

Back 12

Obtuse

Front 13

When do the primary 1st and 2nd molars first show calcification?

Back 13

5-6 months in utero

Front 14

How long does it take the root of a deciduous tooth to completely form?

Back 14

one year after eruption

Front 15

When is the root of a primary mand. central incisor usually formed and calcified?

Back 15

18 months of age

Front 16

What tooth is the first to begin calcifying?
When?

Back 16

Mand. permanent first molar
At birth

Front 17

What are the major differences between the max. primary and Permanent canines?

Back 17

Primary:
Cusp - longer and sharper
Mesial cusp ridge longer than distal
Especially wide and short

Front 18

Which tooth has a very large mesial marginal ridge which resembles a cusp and also has a transvers ridge from ML to MB cusps that is rather large?

Back 18

Primary mand. first molar
(Usually hard to restore)

Front 19

What are the characteristics of the Primary mand. 1st molar?

Back 19

Does not resemble any other tooth
MB cusp always largest and longest
MB cusp occupies 2/3rds of buccal surface
ML larger, longer, sharper than DL
Crown wider mesiodistally than high cevico-occlusally
No central fossa
MMR well developed
Prominent MB cervical ridge

Front 20

How many developmental lobes does a Primary max. canine have?

Back 20

4
MF, MidF, DF, L

Front 21

What shape does the canine have from the facial?

Back 21

Pentagonal

Front 22

The sum of the mesiodistal width of primary molars in any one quadrant is greater than the permanent premolars which succed them by how much?

Back 22

2-5 mm

Front 23

Which molars have crowns that are shorter and more bulbous with pronounced buccal and lingual cervical ridgesand a constricted cervical area?
Primary/Permanent

Back 23

Primary

Front 24

Which molars have an occlusal table that is narrower faciolingually?
Primary/Permanent

Back 24

Primary

Front 25

Which molars have anatomy that is deeper?
Primary/Permanent

Back 25

Permanent

Front 26

Which molar has a prominent mesial cervical ridge that makes it easier to distinguish from rt. and lt.?
Primary/Permanent?

Back 26

Primary

Front 27

What molars have roots that are shorter and wider?
Primary/Permanent

Back 27

Permanent

Front 28

What molars have roots that are extremely narrow mesiodistally and very broad buccolingually?
Primary/Permanent

Back 28

Primary

Front 29

Which molar has roots that are less divergent and more curved with a large root trunk?
Primary/Permanent

Back 29

Permanent

Front 30

How do primary Incisors differ from permanent incisors?

Back 30

Newly erupted permanent incisors do not show mamelons

Front 31

What is the only Incisor with a mesiodistal diameter greater than its crown height?

Back 31

Primary max. central incisor

Front 32

Which Max. central tooth has a longer inciso-cervical length?
Primary/Permanent

Back 32

Permanent

Front 33

Which max. central incisor has a straighter incisal edge?
Primary/Permanent

Back 33

Primary

Front 34

Which Max. incisors have more prominent labial and lingual cervical ridges?
Primary/Permanent

Back 34

Primary

Front 35

What is the largest primary tooth?

Back 35

Mand. second molar

Front 36

What is the smallest primary tooth?

Back 36

Mand. lateral incisor

Front 37

What is the largest permanent tooth?

Back 37

Max. first molar

Front 38

What is the smallest permanent tooth?

Back 38

Mand. central incisor

Front 39

Which primary molar is the most atypical of all molars, primary and permanent, and appears to be intermediate in form and development between a premolar and a molar?

Back 39

Primary max. first molar

Front 40

What is the tooth that is the smallest molar in all dimensions except labiolingual diameter?

Back 40

Max. primary first molar

Front 41

How many cusps does a primary max. first molar have?

Back 41

2 Main
Wide MB
Narrow ML
2 Indistinct - DB, DL

Front 42

Which cusp of the Primary Max. first molar is the longest?

Back 42

MB
ML second longest/but sharpest

Front 43

Where is the cervical line of the Primary Max. first molar?

Back 43

Cervical line is higher mesially than distally

Front 44

Where does the cervical ridge of the primary max. first molar stand out distinctly?

Back 44

Mesiobuccal portion of the tooth

Front 45

What is the occlusal pit pattern of the Primary max. first molar?

Back 45

H-shaped

Front 46

What are the characteristics of the Primary max. first molars roots?

Back 46

3
form resembles permanent max. first molar

Front 47

Which surface on the primary first molar crown is larger?
Mesial/Distal

Back 47

Mesial

Front 48

What spaces are present between primary max. lateral and canines and primary mand. canine and premolars?

Back 48

Primitive spaces

Front 49

In what kind of dentition do primate spaces appear?

Back 49

Deciduous dentition

Front 50

When do primate spaces become present?

Back 50

Normally present from the time the teeth erupt

Front 51

What are the primate spaces usually a result of?

Back 51

Caused by growth of the dental arches

Front 52

How do the cusps of the primary mand. second molar differ from the permanent mand. first molar?

Back 52

Primary molar has = MB, DB, and distal cusps
Permanent molar has smaller distal

Front 53

What is the difference between the mand. primary second molar, and the mand. permanent first molar as seen from the buccal aspect?

Back 53

Primary is is narrower mesiodistally at the cervical part of the crown than at the contact level

Front 54

Why are primary mand. second molars teeth with divergent roots?

Back 54

They allow for eruption of the permanent second premolar

Front 55

Which molars have the greatest faciolingual diameter of all primary teeth?

Back 55

Primary second molars

Front 56

What are the primary teeth which present the most noticeable morphologic deviations from permanent teeth?

Back 56

Primary first molars

Front 57

What tooth does the Primary max. second molar most resemble?

Back 57

Permanent Max. first molar (smaller)

Front 58

Which primary molars are the larger size and most closely resemble the permanent first molars?

Back 58

Primary second molars

Front 59

What are primary molar relationships known as?

Back 59

Step relationships

Front 60

The distal surface of the lower second primary molar is mesial to the distal surface of the upper second primary molar.

Back 60

Mesial-step relationship

Front 61

What does the mesial step molar relationship allow the permanent first molars to do?

Back 61

Allows for normal occlusion immediately on eruption.
(class I occlusion)

Front 62

Situation where the distal surfaces of the max. and mand. second primary molars are in an end to end relationship.

Back 62

Flush-terminal-plane relationship

Front 63

What is a flush-terminal-plane relationship also known as?

Back 63

flat-plane relationship
end-to-end relationship

Front 64

What class of occlusion results from a flush-terminal-plane relationship?

Back 64

Class II relationship

Front 65

When a class II relationship is adjusted do to the loss of primary max. second molars thus gaining a Class I occlusion.
When does this happen?

Back 65

Late mesial shift
occurs at age 10-11

Front 66

Distal surface of the mand. primary second molar is located to the distalsurface of the max. primary second molar.

Back 66

Distal step relationship

Front 67

What relationship results from a distal step?

Back 67

Class II relationship