8120.01.42 Anterior Teeth

Front 1

basic tooth outline shapes and dimensions

Back 1

W/L; relates to the outline form of individual teeth and their relative proportions and relationships to each other

Front 2

oval/round shaped teeth

Back 2

Front 3

triangular shaped teeth

Back 3

Front 4

rectangular shaped teeth

Back 4

Front 5

what personality type is represented by oval shaped teeth?

Back 5

Front 6

what personality type is represented by triangular shaped teeth?

Back 6

Front 7

what personality type is represented by rectangular teeth?

Back 7

Front 8

what personality type is represented by square shaped teeth?

Back 8

Front 9

The tooth width/length ratio is

Back 9

between 75 and 80%

Front 10

If the width/length ratio of a tooth is too great, the tooth will appear

Back 10

short (>0.85)

Front 11

If the width/length ratio of a tooth is too low, the tooth will appear

Back 11

narrow (<0.65)

Front 12

central incisors are _________ than the laterals by _______ mm

Back 12

wider than the laterals by 2-3mm

Front 13

central incisors are ________ than the canines by ______ mm

Back 13

wider than the canines by 1-1.5mm

Front 14

Canines are wider than the _______ by _______ mm

Back 14

wider than the laterals by 1-1.5mm

(remember that the canines are WIDER than the laterals even though they are more distal to the midline than the laterals)

Front 15

The centrals are as LONG as the ______

Back 15

canines

Front 16

The centrals and the canines are longer than the laterals by ________

Back 16

1-1.5 mm

Front 17

We need to know the width of the worn, short centrals to calculate a patient's proposed, ideal, ESTHETIC length.... how do we calculate this?

W/L= _______

Back 17

desired proportion

If we are give 9mm as the WIDTH of the tooth,

W/L=desired proportion

9/L= desired proportion (.85)

9/.85= L

10.5= L

Front 18

_______ are convexities (raised areas) that run vertically through the tooth

Back 18

developmental lobes

Front 19

What is the first part of the tooth to develop?

Back 19

developmental lobes (they create the final overall shape of the tooth)

Front 20

What is the longest and most prominent developmental lobe?

Back 20

MESIAL

Front 21

Which is the more rounded developmental lobe?

Back 21

DISTAL

Front 22

Which lobe is wider and usually depressed?

Back 22

CENTRAL

Front 23

Example of mesial, distal and central developmental grooves on anterior centrals (this is just an image for reference)

Back 23

Front 24

Example of mesial, distal and central developmental grooves on anterior central and lateral (this is just an image for reference)

Back 24

Front 25

Shallow vertical depressions or concavities in the facial surface that develop as the lobes grow together

Back 25

developmental grooves

Front 26

Developmental grooves run _______ with the long axis

Back 26

Parallel

Front 27

What distinguishes the fullness of the mesial and distal lobes?

Back 27

Developmental grooves

Front 28

On the centrals, the ______ developmental groove is longer than the _______

Back 28

mesial is longer than the distal

Front 29

On the laterals, the _____ developmental groove is longer than the ______.

Back 29

mesial is longer than distal

Front 30

On cuspids, the ______ developmental groove is shorter, extending only through the _____ third

Back 30

The mesial groove is shorter, extending only through the incisal third

Front 31

The longest developmental groove on the cuspids, the _______ groove, extends through the ______ third of the tooth.

Back 31

The distal groove is longest on the cuspids, extends through the middle third of the tooth

Front 32

the term delineating the visual transition from the facial surface into the inter-proximal areas

Back 32

transitional line angles

Front 33

What is created by the heights of contour of the mesial and distal lobes?

Back 33

Transitional line angles

Front 34

______ are created from the transition/connection between the interproximal surfaces and the incisal edges

Back 34

incisal angles

Front 35

The _______ angles of the upper central incisors are usually close to 90 degrees

Back 35

mesio-incisal angles

The same applies for laterals but overallmore rounded than centrals

Front 36

The _____angles of the upper central incisors are usually more rounded

Back 36

distal

The same applies for laterals but overallmore rounded than centrals

Front 37

The MI/DI angles of the lower incisal _______ are very similar, and difficult to differentiate

Back 37

lower incisal centrals

Front 38

The lower _______ incisors are less symmetrical, and the distal crown bulges

Back 38

Lower lateral incisors

Front 39

The upper and lower canines consist of two _______ that come together to form a cusp

Back 39

Two slopes

Front 40

The ______ slope of the canines is shorter and less angled (more flat) as compared to the _______ slope.

Back 40

Mesial, distal

Front 41

The _____ slope of the canines is longer and more tilted than the ____ slope

Back 41

distal slope, mesial slope

Front 42

Rounded prominences resulting from lobe formation

Back 42

mamelons

Front 43

Formed by the convergence of the 3 lobes at the gingival 3rd of the tooth

Back 43

gingival bulge

Front 44

What protects the gingiva from trauma after mastication?

Back 44

the gingiva bulge

Front 45

On the ____ and _____, the shorter distal lobe is less prominent where it blends into the gingival bulge

Back 45

centrals and laterals

Front 46

On cuspids, the ________ lobe forms the majority of the gingival bulge; the smaller _____ lobe is sometimes separated from the bulge by a _________

Back 46

Central lobe; smaller distal lobe separated from bulge by a slight depression

Front 47

The _______ is a flat, slightly depressed area bordered by curved surfaces..... the borders include _________________

Back 47

Primary plane; bordered by mesial and distal lobes and gingival bulge

Front 48

When present, the position of the primary plane determines the ______ of the mesial and distal lobes and indicates the location of the _______

Back 48

determines the width of mesial and distal lobes, location of developmental grooves

Front 49

Created when light strikes the facial surface of an anterior tooth and the majority is reflected

Back 49

Reflective area

Front 50

The outline created by curved surfaces that border the reflective area

Back 50

Deflective area- they deflect light (duh) (black lines in image)

Front 51

The broad zone in which two adjacent teeth touch

Back 51

Inter-proximal contact area

Front 52

__________ of the lengthof the maxillary central incisors is defined asthe ideal connector space

Back 52

50%

Front 53

The idealconnector space between the maxillary lateralincisor and central incisor would be _______ ofthe length of the maxillary central incisor and ______ of the length between the lateral incisorand canine.

Back 53

40%, 30%

Front 54

The most incisal aspect of the inter-proximal area

Back 54

Inter-proximal contact point

Front 55

As the the inter-proximal contact point moves apically, the further ______ one moves from the midline

Back 55

posterior

Front 56

The mesial contact of the central is slightly elongated and more towards the ________

Back 56

incisal

Front 57

The ______ contact of the central is higher due to the

Back 57

rounded distal edge

Front 58

The _____ contact of the lateral is more gingival than that of the central. The distal contact of the lateral is almost at the _______

Back 58

mesial contact is more gingival

distal contact is almost at the middle third

Front 59

The incisal outline created by the proximity and contact of adjacent teeth with their surrounding structures

Back 59

incisal embrasure

Front 60

Reference image for the angles of incisal embrasures

Back 60

Front 61

Defined by the level of interdental contact and tooth shape

Back 61

Incisal embrasures

Front 62

Defined by the incisal embrasures

Back 62

Incisal edge outline

Front 63

V shaped areas located gingival to the inter proximal areas that provide a space for the interdental papillae

Back 63

gingival embrasures

Front 64

a large convexity which extends from the gingiva, fading into the middle third of the tooth

Back 64

cingulum

Front 65

convex areas that form the mesial and distal borders of the lingual surface

Back 65

lingual marginal ridges

Front 66

_______ blend into the cingulum

Back 66

lingual marginal ridges

Front 67

a large depression on the lingual surface bordered by the mesial and distal marginal ridges, the cingulum and the incisal edge

Back 67

lingual concavity

Front 68

the biting/cutting surface of incisors

Back 68

incisal edge

Front 69

on the upper incisors, the incisal edge angle wears towards the ______ side

Back 69

lingual side

Front 70

on the lower incisors, the incisal edge angle wears towards the ______ side

Back 70

labial side

Front 71

The ______ is ideally aligned with the curvature of the arch

Back 71

incisal edge

Front 72

the outline created by the surface contour of adjacent teeth

Back 72

facial/lingual embrasure

Front 73

the extent and intensity of the inter-proximal contacts as viewed from the incisal view

Back 73

inter-proximal contact volume

Front 74

the contour of a tooth where it emerges from the gingiva, which must mimic the silhouette of the natural dentition, in the gingival 1/3, when viewed from both facial or profile views

Back 74

emergence profile (a proper emergence profile protects the soft tissue)

Front 75

the profile appearance of the silhouette of the tooth; determined by 3 different inclination planes according to the thirds they are located (cervical, middle, incisal)

Back 75

vertical contours

Front 76

the 3 labial lobes that form anterior teeth create ______ and _____ developmental depressions and _____ (unworn incisal edges)

Back 76

mesiolabial and distolabial developmental depressions ; and MAMELONS

Front 77

the maxillary incisors have _____ root(s), typically ____ canal

Back 77

one root, one canal

Front 78

anterior teeth are shaped like ______ from the facial view, _______ from the incisal view, and _____ from the mesial view

Back 78

facial: trapezoid

incisal: triangles

mesial: triangles

Front 79

all interior teeth have ______ contact points in the middle third of the crown

Back 79

facio-lingual (think of the incisal view--- looking onto the tooth from the incisal edge)

Front 80

from the incisal view of the maxillary incisors, all contacts are ________

Back 80

centered labiolingually

Front 81

on the lingual surface of the maxillary incisors, the mesiolingual and distolingual line angles coincide well with

Back 81

mesial and distal marginal ridges

Front 82

which maxillary tooth has the deepest lingual fossa

Back 82

maxillary lateral

Front 83

the maxillary ______ has the deepest lingual fossa

Back 83

maxillary lateral; may also have lingual groove that runs below the bone

Front 84

the only tooth with pulp wider mesio-distally than facio-lingually

Back 84

maxillary central incisors

Front 85

the only tooth with a cross section through CEJ that appears triangular

Back 85

maxillary central incisor

Front 86

the second tallest crown in the mouth

Back 86

maxillary central incisor (#1 mandibular canine, #3 is maxillary canine)

Front 87

maxillary central incisors have _____ and _____ root with a blunt _____

Back 87

short and straight root, blunt apex

Front 88

the cingulum is displaced _______ on the max central incisors

Back 88

distally

Front 89

the max central incisor is shaped like a _____ from the incisal view

Back 89

triangle

Front 90

the labial surface of the maxillary central incisors is almost

Back 90

flat

Front 91

the mesiodistal width of the max central incisor is greater than the

Back 91

labiolingual width

Front 92

the root of the max lateral incisor is ______ than max central

Back 92

as long or longer

Front 93

max lateral incisor is ____ shaped from the incisal view

Back 93

oval

Front 94

which tooth has the best developed lingual anatomy

Back 94

max lateral incisor

Front 95

which tooth is most likely to have dens-in-dente

Back 95

max lateral incisor

Front 96

the 2nd most congenitally malformed or missing tooth

Back 96

max lateral incisor (#1=3rd molars, #3= mandibular 2nd premolar)

Front 97

deficient mesial and distal lobes

Back 97

peg lateral incisors

Front 98

canine-like lateral incisors with small cusp

Back 98

max lateral incisor

Front 99

prominent mesioincisal corner with cervical constriction

Back 99

toed lateral incisor

Front 100

more square crown with less cervical constriction

Back 100

small central incisor

Front 101

the incisal ridge of max lateral incisors is

Back 101

rounded in comparison to max central incisors

(the edges are rounded too)

Front 102

the labial surface of the crown and root of a max lateral incisor is ____

Back 102

more convex than central incisor

Front 103

the maxillary ______ may have a deep developmental pit or groove that extends onto root

Back 103

max lateral incisors

may lead to periodontal disease, pulpal pathology; this pit or groove is known as linguogingival fissue

Front 104

the pulp horns or permanent anterior teeth correspond with

Back 104

developmental mamelons

Front 105

in the incisal region, the pulp chamber of permanent anterior teeth is wide ______ and narrow _____ (max centrals)

Back 105

wide mesiodistally and narrow labiolingually

Front 106

an apical curve root is present in approximately ___% of permanent anterior teeth (max centrals)

Back 106

25%

Front 107

over ____% of max lateral incisors have a distal root curvature

Back 107

50%

Front 108

the only primary or permanent incisor with a mesiodistal dimension greater than its cervico-incisal crown height

Back 108

max central incisor

Front 109

the smallest tooth

Back 109

mand central incisor

Front 110

narrowest tooth mesiodistally

Back 110

mand central incisor

Front 111

most symmetric tooth

Back 111

mand central incisor

Front 112

first succadaneous tooth

Back 112

mand central incisor

Front 113

tooth with smallest facial and incisal embrasure

Back 113

mand central incisors

Front 114

40% of mand central incisors have _____ root canal (s)

Back 114

two

Front 115

the incisal edge is twisted on its apex in ______

Back 115

mand lateral incisors

Front 116

the _____ angle of the mandibular lateral incisors is the only line angle that is slightly rounded

Back 116

disto-incisal

Front 117

in mand central incisors, the labiolingual dimension is _____ than the mesiodistal dimension

Back 117

larger- this is what distinguishes from the max central and laterals

Front 118

the incisal ridge of mand lateral incisors slopes down towards ________

Back 118

distal side; this is what distinguishes mesial from distal

Front 119

when performing endodontic therapy on the mandibular anterior teeth, a practitioner must

Back 119

search to see if there is a 2nd root canal; the root is very thin and may have mesial and distal concavities when there are 2 canals

Front 120

All of the following are correct about mandibular lateral incisors except:

Back 120

A. They are a little larger in all dimensions compared to mandibular centrals.

B. The crown is not as bilaterally symmetrical compared to mandibular centrals.

C. The cingulum is directly in the center of the lingual surface.

D. The root is very narrow mesiodistally.

Front 121

Of the two mandibular incisors, which has a root that is larger in all dimensions?

Back 121

(central or lateral?)

Front 122

When viewed from a buccal or lingual aspect, the crowns of mandibular incisors predominantly have a

Back 122

triangular outline

Front 123

Which of the following is the most reliable criterion for differentiating a mandibular central incsior from a mandibular lateral incisor?

Back 123

A. root length

B. Ratio of crown to root length

C. degree of slope of incisal edge when viewed facially

D. rotation of the crown of the root