Br-- Tooth And Root Morphology

Front 1

What does the cervical cross section of maxillary incisor roots look like?
• triangular
• ovoid
• elliptical

Back 1

•TRIANGULAR
Canines are ovoid
Mandibular incisors are elliptical

Front 2

Which tooth is has a large crown to root length proportion, 90 degree MI angle, and a well developed cingulum off centered to the distal?

Back 2

Maxillary central incisor

Front 3

Are there mesial and distal concavities at the CEJ on max cent inc?

Back 3

YES because of the bulbous crown

Front 4

T or F The maxilary central incisor: The cone shaped root is off centered to the distal over the crown

Back 4

FALSE, it is centered over the crown

Front 5

Which is the smallest tooth in the mouth that occludes only with one tooth and has a symmetrical crown?

Back 5

the mand central incisor

Front 6

This tooth has a short crown to root ratio, has a single simple root that is widest L-L, and a shallow mid-root longitudinal depression

Back 6

the mand central incisor

Front 7

This tooth is has a root that is longer than the crown, has a narrow root that is widest L-L, has NO root depressions or flattening, and the crown commonly has a lingual pit.

Back 7

Max lat inc

Front 8

Which tooth has a D-L twist in the crown?

Back 8

the mand lat inc

Front 9

T or F The mand lateral incisor has a slightly thicker and wider root than the man cent

Back 9

true

Front 10

Which tooth has the longest and the strongest roots?

Back 10

maxillary canines

Front 11

T or F The mesial marginal ridge is heavier in maxillary canine with a well devloped cingulum

Back 11

FALSE, it is heavier on the DISTAL, but yes, it does have a well developed cingulum

Front 12

What are the main differences between max and mand canines?

Back 12

Mand-- narrower, shorter root, smoother lingual surface, apical third can bifurcate, incisal edge located in the lingual center of tooth

Front 13

A mandibular canine root sometimes bifurcates into a ...

Back 13

F and L root at the apical third

Front 14

Where are proximal contact areas in maxillary premolars?

Back 14

at the junction of the occlusal and the middle third of the tooth

Front 15

What do the cross section of max PM's look like?

Back 15

elliptical

Front 16

Which premolar has two roots?

Back 16

the maxillary 1st

Front 17

Which cusp is shorter in a max 1st pm?

Back 17

the lingual is both short and narrower than the facial

Front 18

Which cusp is longer in a max 2nd pm?

Back 18

neither they are the same size

Front 19

Which maxillary premolar is more round or ovoid in comparison to the other that is more hexagon shaped?

Back 19

max 2nd premolar

Front 20

Which maxillary premolar has a mesial marginal groove and concavity?

Back 20

They both do, but the max 1st is usually more prominent

Front 21

Which maxillary premolar has more supplemental grooves?

Back 21

second

Front 22

Which set of pre-molars are wider FL than MD?

Back 22

maxillary premolars

Front 23

T or F. The mand pm's are rhomboidal shaped (from the proximal view) because the crown is inclined lingually to the long axis of the eooth

Back 23

True!

Front 24

Where are the proximal contacts located in mand premolars?

Back 24

Cervical to the junction of the occlusal and middle thirds of the tooth, which is lower than the maxillary PM's

Front 25

What is one difficulty in instrumentation in the mandibular premolars?

Back 25

there is a lingual inclination of the crown so Lingual surfaces can be hard to access.

Front 26

Which tooth has a completely afunctional lingual cusp?

Back 26

mandibular first premolar

Front 27

What is the most prominent feature of the mand first premolar?

Back 27

the mesial lingual groove

Front 28

On a 1st mand PM, the F cusp is _____ the size of the L cusp

Back 28

Twice

Front 29

T or F the distal half of the mand 1st pm is usually smaller than the mesial.

Back 29

FALSE, the mesial is smaller.

Front 30

Which tooth is the only premolar tha may have a transverse ridge that does not cross an occlusal developmental groove?

Back 30

the mand first premolar.

Front 31

The occlusal outline of the mand 2nd premolar is ____

Back 31

square

Front 32

How are the mand 1st and 2nd premolar lingual cusps different?

Back 32

Mand second has prominent lingual cusps

Front 33

Which occlusal pattern in the most common in mand second pm?

Back 33

the Y pattern which has THREE cusps, AND has a central PIT

Front 34

What is the maximum number of furcations in one tooth?

Back 34

three

Front 35

The longest and largest root in maxillary molars is

Back 35

the Lingual root

Front 36

T or F Maxillary molars are rhomboidal shaped

Back 36

true

Front 37

Maxillary molars are wider ____ than _____

Back 37

Wider FL than MD

Front 38

Which cusp is the largest in Max molars and which is usually the smallest

Back 38

ML is the largest
DL is the smallest

Front 39

Where is the proximal contact located in max molars?

Back 39

the middle third

Front 40

An oblique ridge in max molars runs from which cusps?

Back 40

ML to DF

Front 41

The 5th afunctional cusp seen on max 1st molars is known as

Back 41

the cusp of carbelli

Front 42

What may appear on mesial marginal ridge of max first molar?

Back 42

cusplets

Front 43

T or F. Maxillary second molars commonly have cusplets and cusp of carabelli

Back 43

FALSE, only first molars do.

Front 44

Facial cusps on Max 1st and 2nd molars are different how?

Back 44

Max 1st-- F cusps are equal height
Max 2nd-- DF is shorter than MF

Front 45

Which tooth has more divergent roots?
Max 1st molar
Max 2nd molar

Back 45

the maxillary 1st molar, the max 2nd is less divergent and have more distal inclination

Front 46

Mand molars are wider ____ than ____

Back 46

Wider MD than FL

Front 47

Where are the proximal contacts in mand molars?

Back 47

middle third

Front 48

Which mand molar is larger?

Back 48

the mand 1st

Front 49

T or F The mesial root in mand second molar has a reasonable changed to have two root canals

Back 49

FALSE, the mand FIRST molar may have two canals in the mesial root

Front 50

List in order:
Which are most likely to have fused roots?
1st mand molar
2nd mand molar
3rd mand molar

Back 50

The 3rd molar is most likely, then 2nd molar

Front 51

Which arch erupts first in primary dentition?

Back 51

mandibular teeth usually erupt two months before maxillary teeth

Front 52

List in order the eruption sequence of the primary teeth

Back 52

Central incisors 8-12 mon
Lateral inc 9-13 mon
First Molar 13-19 mo
Canine 16-22 mon
Second Molar 25-33

Front 53

List in order the eruption sequence of the permanent dentition

Back 53

First molar Mand 6-7 Max 6-7
Cent inc 6-7 max 7-8
Lateral incisor 7-8 max 8-9
Canine mand 9-10, max 11-12
First PM mand 10-12 max 10-11
2nd PM mand 11-12 max 10-12
2nd molar mand 11-13 max 12-13
3rd molar mand 17-22 max 17-22

Front 54

Why are ultrasonics contraindicated in deciduous teeth?

Back 54

the pulp chambers are large

Front 55

Which teeth are succedaneous?

Back 55

permanent incisors, canine, premolars

Front 56

Anatomic crown

Back 56

part of the tooth which is covered by enamel, whether it is erupted or not

Front 57

Clinical crown

Back 57

part of tooth visible in oral cavity, may include portions of the root, includes portion of tooth in the sulcus where techniques can be applied

Front 58

Anatomical root

Back 58

part of tooth covered by cementum

Front 59

Clinical root

Back 59

portion of tooth comvered and embedded in gingival and socket, cannot apply techniques there

Front 60

Developmental groove

Back 60

shallow groove or line between primary parts of crown or root

Front 61

Tubercle

Back 61

small elevation on some portion of the crown, extra enamel, deviations from typical form

Front 62

Pit

Back 62

place where grooves cross or join

Front 63

Triangular fossae

Back 63

either mesial or distal to marginal ridges

Front 64

Triangular ridges are named by

Back 64

after the cusp to which they belong (triangular ridge of the buccal cusp)