Tooth Morphology

Front 1

Major anatomic landmarks of Maxillary central incisor

Back 1

Front 2

Labial aspect of Maxillary central incisor

Back 2

Front 3

Maxillary central incisor—lingual aspect

Back 3

Front 4

Maxillary central incisor—mesial aspect

Back 4

Front 5

Maxillary central incisor—distal aspect

Back 5

Front 6

Maxillary central incisor—incisal aspect

Back 6

Front 7

Root of Maxillary central incisor

Back 7

Front 8

Side identification of Maxillary central incisor

Back 8

Sharp mesioincisal angle and rounded distoincisal angle

Front 9

________ is the most prominent tooth.

Back 9

Maxillary central incisor is the most prominent tooth.

Front 10

_________ has the greatest mesial CEJ contour of all teeth.

Back 10

Maxillary central incisor has the greatest mesial CEJ contour of all teeth.

Front 11

_____ has the second longest crown (next to mandibular canine).

Back 11

Maxillary central incisor has the second longest crown (next to mandibular canine).

Front 12

________ is the widest anterior tooth.

Back 12

Maxillary central incisor is the widest anterior tooth.

Front 13

Major anatomic landmarks of Maxillary lateral incisor

Back 13

Front 14

Maxillary lateral incisor—labial aspect

Back 14

Front 15

Maxillary lateral incisor—lingual aspect

Back 15

Front 16

Maxillary lateral incisor—mesial aspect

Back 16

Front 17

Maxillary lateral incisor—distal aspect

Back 17

Front 18

Maxillary lateral incisor—incisal aspect

Back 18

Front 19

Root of Maxillary lateral incisor

Back 19

Front 20

Side identification of Maxillary lateral incisor

Back 20

Side identification of Maxillary lateral incisor

• More rounded distoincisal angle

• Incisal ridge starts distally

• Root shows distal curvature at apical 3rd

Front 21

_____ is the 2nd most common congenitally missing tooth (next to third molars).

Back 21

Maxillary lateral incisor is the 2nd most common congenitally missing tooth (next to third molars).

Front 22

_____ is the most common tooth to have a palato-radicular groove.

Back 22

Maxillary lateral incisor is the most common tooth to have a palato-radicular groove (2–5% prevalence), which can make scaling difficult.

Front 23

____ is the 2nd most common variable tooth form (next to third molars).

Back 23

Maxillary lateral incisor is the 2nd most common variable tooth form (next to third molars).

Front 24

The permanent maxillary lateral incisor is smaller than the maxillary permanent central incisor in all dimensions except:

a. Crown length

b. Root length

c. Both a and b

d. None of the above

Back 24

b. Root length

Front 25

Distal outline of maxillary permanent lateral incisor is:

a. Shorter than mesial outline

b. Larger than mesial outline

c. Similar to that of mesial

d. None of the above

Back 25

a. Shorter than mesial outline

Front 26

In comparison to maxillary permanent central incisor, the labial surface of maxillary permanent lateral incisor is:

a. More convex

b. Less convex

c. More concave

d. Less concave

Back 26

a. More convex

Front 27

When present, the developmental groove crossing the distal side of the cingulum extending on the root of maxillary permanent lateral incisor is called as:

a. Palatogingival groove

b. Palatoradicular groove

c. Palatocervical groove

d. Both a and b

Back 27

d. Both a and b

Front 28

The geometric shape of maxillary permanent lateral incisor from the mesial aspect is:

a. Triangular

b. Trapezoidal

c. Cuboidal

d. Rectangular

Back 28

a. Triangular

Front 29

Mesial contact area of permanent maxillary lateral incisor is located at:

a. Junction of middle and cervical third

b. Center of middle third

c. Junction of incisal and middle third

d. Center of incisal third

Back 29

c. Junction of incisal and middle third

Front 30

Distal contact area of permanent maxillary lateral incisor is located at:

a. At the middle third

b. At the cervical third

c. At the incisal third

d. None of the above

Back 30

a. At the middle third

Front 31

Which of the following statements is false regarding the root of the permanent maxillary lateral incisor?

a. Has single root

b. Root is about one and a half times the length of the crown

c. Root length is greater in proportion to the crown length when compared to central incisor

d. Apical third of root usually shows no curvature

Back 31

d. Apical third of root usually shows no curvature

Front 32

Cross-section of the maxillary permanent lateral incisor root at cervix is:

a. Triangular

b. Oval

c. Circular

d. Diamond shaped

Back 32

b. Oval

Front 33

Mandibular central incisor—major anatomic landmarks

Back 33

Front 34

Mandibular central incisor—labial aspect

Back 34

Front 35

Mandibular central incisor—lingual aspect

Back 35

Front 36

Mandibular central incisor—mesial aspect

Back 36

Front 37

Mandibular central incisor—distal aspect

Back 37

Front 38

Mandibular central incisor—incisal aspect

Back 38

Front 39

Root of Mandibular central incisor

Back 39

Front 40

Side identification of Mandibular central incisor

Back 40

Side identification of Mandibular central incisor:

• diffeDifficult to rentiate left and right mandibular central incisors since the tooth is bilaterally symmetrical

• Developmental depression on root is deeper on distal surface

• The root may show a distal curvature at the apex.

Front 41

_______________is the smallest tooth in permanent dentition

Back 41

Mandibular central incisor is the smallest tooth in permanent dentition

Front 42

_________ is the_narrowest (M-D) tooth

Back 42

Mandibular central incisor narrowest (M-D) tooth

Front 43

_________ is the most symmetrical tooth.

Back 43

Mandibular central incisor is the most symmetrical tooth.

Front 44

_________ has the greatest mesial CEJ contour of mandibular teeth

Back 44

Mandibular central incisor has the greatest mesial CEJ contour of mandibular teeth.

Front 45

________is the first succedaneous tooth to erupt

Back 45

Mandibular central incisor is the first succedaneous tooth to erupt.

Front 46

Mandibular lateral incisor-----major anatomic landmarks

Back 46

Front 47

Mandibular lateral incisor—labial aspect

Back 47

Mandibular lateral incisor—labial aspect

Front 48

Mandibular lateral incisor—lingual aspect

Back 48

Mandibular lateral incisor—lingual aspect

Front 49

Mandibular lateral incisor—mesial aspect

Back 49

Mandibular lateral incisor—mesial aspect

Front 50

Mandibular lateral incisor—distal aspect

Back 50

Mandibular lateral incisor—distal aspect

Front 51

Maxillary canine—major anatomic landmarks

Back 51

Maxillary canine—major anatomic landmarks

Front 52

Maxillary canine—labial aspect

Back 52

Maxillary canine—labial aspect

Front 53

Maxillary canine—lingual aspect

Back 53

Maxillary canine—lingual aspect

Front 54

Maxillary canine—mesial aspect

Back 54

Maxillary canine—mesial aspect

Front 55

Maxillary canine–distal aspect

Back 55

Maxillary canine–distal aspect

Front 56

Maxillary canine—incisal aspect

Back 56

Maxillary canine—incisal aspect

Front 57

Common developmental anomalies of maxillary canines

Back 57

Common developmental anomalies of maxillary canines:

• Ectopic eruption

• Transposition

Front 58

_______are the most commonly impacted teeth after the 3rd molars

Back 58

Maxillary canines are the most commonly impacted teeth after the 3rd molars.

Front 59

In the ________arch, the permanent canines erupt after the eruption of one or both the premolars.

What is the clinical significance?

Back 59

In the maxillary arch, the permanent canines erupt afterthe eruption of one or both the premolars.

ClINICal CONSIDeraTIONS:

Ifspace is not maintained until the eruption the maxillarypermanent canines often erupt labially out of the archcausing malocclusion

Front 60

__________ is observed for classifying malocclusions when the 1st molars are missing

Back 60

Maxillary permanent canine to mandibular canine relationship is observed for classifying malocclusions especially when the 1st molars are missing.

Front 61

Inter-canine distance is often used as a___trait indental anthropology.

Back 61

Inter-canine distance is often used as a gender trait indental anthropology.

Front 62

Maxillary permanent canines provide good supportwhen utilized as ___________ in prosthetic replacement ofmissing teeth

Back 62

Maxillary permanent canines provide good supportwhen utilized as abutments in prosthetic replacement ofmissing teeth

Front 63

What is canine fossa?

What is its clinical significance?

Back 63

Deep concavity on the maxilla, posterior to the canine eminence is called canine fossa.

Clinical significance:

During surgical procedures, the maxillary sinus is often entered by an incision through canine fossa as the wall of the sinus is thin there.

Front 64

Which tooth has the largest cingulum?

Back 64

Tooth that has the largest cingulum:

Maxillary permanent canines

Front 65

Mandibular canine—major anatomic landmarks

Back 65

Mandibular canine—major anatomic landmarks

Front 66

Mandibular canine—labial aspect

Back 66

Mandibular canine—labial aspect

Front 67

Mandibular canine—lingual aspect

Back 67

Mandibular canine—lingual aspect

Front 68

Mandibular canine—mesial aspect

Back 68

Mandibular canine—mesial aspect

Front 69

Mandibular canine—distal aspect

Back 69

Mandibular canine—distal aspect

Front 70

Mandibular canine—incisal aspect

Back 70

Mandibular canine—incisal aspect

Front 71

_________ tooth has the longest root

Back 71

Maxillary permanent canine has the longest root

Front 72

Side identification of Maxillary permanent canine

Back 72

Side identification of Maxillary permanent canine:

• Distal cusp slope is longer than the mesial

• Root apex often show a distal curvature

• Developmental depression of the root is deeper on the distal surface

Front 73

Variations in Mandibular canine

Back 73

Variations in Mandibular canine

• Bifurcation of the root

• long root

• short root

Front 74

Identification features of mandibular canine

Back 74

Identification features of mandibular canine:

• The mandibular permanent canine has a long and narrow crown with a sharp cusp

• The labial ridge and cingulum are less prominent

• The distal cusp slope is longer than the mesial

• The crown appears to be tilted distally on the root base

• The root is long and narrow

• When viewed proximally, the cusp tip is lingual to the root axis line

Front 75

Side identification of mandibular canine

Back 75

Side identification of mandibular canine:

• The distal cusp slope is longer

• Developmental depression on the mesial surface of the root is deeper

• Viewed, labially the mesial outline is straight and distal outline is rounded

Front 76

The term canine eminence refers to:

a. Alveolar bone over the roots of maxillary permanent canines, labially, is prominent and or is prominent labial alveolar bone over the roots of maxillary permanent canines

b. Prominent lingual alveolar bone over the roots of maxillary permanent canines

c. Least prominent labial alveolar ridge/bone over the roots of maxillary permanent canines

d. Least prominent labial alveolar ridge/bone over the roots of maxillary permanent canines

Back 76

The term canine eminence refers to:

a. Alveolar bone over the roots of maxillary permanent canines, labially, is prominent and

or is prominent labial alveolar bone over the roots of maxillary permanent canines

Front 77

_________canine erupts before premolars in the same arch and wellbefore _________ canine

Back 77

Mandibular canine erupts before mandibular premolars and well before maxillary canine

Front 78

Middle labial lobe is very well-developed into labial ridge in _____ canine

Back 78

Middle labial lobe is very well-developed into labial ridge in Maxillary permanent canine

Front 79

The crown is broader and shorter in _____ canine as compared to its counterpart in the opposite arch

Back 79

The crown is broader and shorter in Maxillary permanent canine as compared to the Mandibular canine

Front 80

In _____ canine mesial cusp ridge is usually concave while in _____ the cusp ridges are straight

Back 80

In maxillary canine mesial cusp ridge is usually concave while in mandibular canines the cusp ridges are straight.

Front 81

The cingulum is smooth and poorly developed in ________ canine.

Back 81

The cingulum is smooth and poorly developed in mandibular canine.

Front 82

Marginal ridges are well developed in________ canine.

Back 82

Marginal ridges are well developed in Maxillary canine.

Front 83

Incisal edge slopes lingually in ____canine while it slopes labially in______canine.

Back 83

Incisal edge slopes lingually in maxillary canine while it slopes labially in mandibular canine.

Front 84

Developmental groove on distal surface of root of _______ canine is more deep, while the developmental groove on mesial surface is more pronounced on _______ canine.

Back 84

Developmental groove on distal surface of root of maxillary canine is more deep,

while the developmental groove on mesial surface is more pronounced on mandibular canine.

Front 85

Maxillary 1st premolar—buccal aspect

Back 85

Maxillary 1st premolar—buccal aspect

Front 86

Maxillary 1st molar—buccal aspect

Back 86

Maxillary 1st molar—buccal aspect

Front 87

Maxillary 1st molar—lingual aspect

Back 87

Maxillary 1st molar—lingual aspect

Front 88

Maxillary 1st molar—mesial aspect

Back 88

Maxillary 1st molar—mesial aspect

Front 89

Maxillary 1st molar—distal aspect

Back 89

Maxillary 1st molar—distal aspect

Front 90

Maxillary 1st molar—occlusal aspect

Back 90

Maxillary 1st molar—occlusal aspect

Front 91

What is the maxillary molar primary cusp triangle?

Back 91

• From the developmental point of view, the maxillarymolars have only three primary cusps namely, themesiobuccal, the distobuccal and the mesiolingual

•The distolingual cusp becomes progressively smaller on2nd and 3rd maxillary molars

•This triangular arrangement of the three primary cuspsis characteristic of all maxillary molars and is called asthe maxillary molar primary cusp triangle

Front 92

The ____________cusp becomes progressively smaller on 2nd and 3rd maxillary molars

Back 92

The distolingual cusp becomes progressively smaller on 2nd and 3rd maxillary molars.

Front 93

Enlist the cusps of Maxillary 1st molar in the decreasing order of size

Back 93

The cusps of Maxillary 1st molar in the decreasing order of size are:

– Mesiolingual (largest cusp)

– Mesiobuccal

– Distobuccal

– Distolingual

– Fifth cusp

Front 94

The oblique ridge is formed by the union of the triangularridge of the ____cusp and the distal ridge of the_________cusp.

Back 94

The oblique ridge is formed by the union of the triangularridge of the distobuccal cusp and the distal ridge of themesiolingual cusp.

It is at the same level as the marginalridges and is sometimes crossed by a developmentalgroove.

Front 95

Maxillary 1st molar—major anatomic landmarks

Back 95

Maxillary 1st molar—major anatomic landmarks

Front 96

Identification features of maxillary 1st molar:

Back 96

Identification features of maxillary 1st molar:

• The tooth has a large crown and three roots

• The crown is wider buccolingually than mesiodistally

• Its occlusal aspect is rhomboidal

• The cusp of Carabelli is a unique feature of maxillary molar, presentlingual to the mesiolingual cusp

• Another characteristic feature of maxillary molar is the obliqueridge running obliquely from the mesiolingual cusp to the distolingualcusp.

Front 97

Side identification of maxillary 1st molar:

Back 97

Side identification of maxillary 1st molar:

• When viewed occlusally, the crown is wider mesially than distally

• By locating the cusp of Carabelli that is located lingual to the mesiolingual cusp

• The buccal roots tend to have a distal inclination.

Front 98

___________is the largest permanent tooth

Back 98

Maxillary 1st molar is the Largest permanent tooth

Front 99

______ is the only tooth that is broader lingually than buccally.

Back 99

Maxillary 1st molar is the only tooth that is broader lingually than buccally.

Front 100

__________is the widest tooth.

Back 100

Maxillary 1st molar is the widest tooth (B-L).

Front 101

_________ is the first permanent maxillary tooth to erupt.

Back 101

Maxillary 1st molar is the first permanent maxillary tooth to erupt.

Front 102

Enlist the cusp heights of maxillary 1st molar in decreasing order

Back 102

Cusp heights of maxillary 1st molar:

ML > MB > DB (primary cusp triangle) > DL (secondarycusp triangle) > Carabelli.

Front 103

__________________is the only tooth with two triangular ridges on one cusp (ML cusp): form the transverse and oblique ridges.

Back 103

Maxillary 1st molar is the only tooth with two triangular ridges on one cusp (ML cusp):

-form the transverse and oblique ridges.

Front 104

________is the only tooth with a pronounced distal concavity at the CEJ, which can make scaling difficult.

Back 104

Maxillary 1st molar is the only tooth with a pronounced distal concavity at the CEJ, which can make scaling difficult.

Front 105

______has the most prominent oblique ridge of all maxillary molars.

Back 105

Maxillary 1st molarhas the most prominent oblique ridge of all maxillary molars.

Front 106

In all maxillary molars the________ groove of the oblique ridge connects the_____ and _____ fossae.

Back 106

In all maxillary molars the transverse groove of the oblique ridge connects the central and distal fossae.

Front 107

Shortest root of maxillary 1st molar

Back 107

Disto Buccal Root is the shortest root of maxillary 1st molar

Front 108

Longest root of maxillary 1st molar

Back 108

Palatal root is the longest root of maxillary 1st molar.

Front 109

Apices of ____tooth are closest to maxillary sinus.

Back 109

Apices of maxillary 1st molar are closest to maxillary sinus.

Front 110

________is sometimes referred to as the Carabelli trait.

Back 110

The cusp of Carabelli is sometimes referred to as the Carabelli trait.