Dental Anatomy-Posterior Teeth

Front 1

Do most premolars have four lobes and where are they?
What premolar is the exception?

Back 1

-yes,three facial and one lingual
-mandibular second premolars

Front 2

What are the two forms of mandibular second premolars?

Back 2

-one type has two cusps B & L
-one type has three cusps 1B & 2L

Front 3

How many lobes are in the 3 cusp type mandibular premolar?

Back 3

5 lobes

Front 4

How many lobes are in the 2 cusp type mandibular premolar?

Back 4

4 lobes

Front 5

How many lobes does the average maxillary and mandibular first molars have?

Back 5

5 lobes

Front 6

How many lobes does the average maxillary and mandibular second molars have?

Back 6

4 lobes

Front 7

What is a groove/developmental groove?

Back 7

a linear channel on the surface of the tooth, usually the junction of the dental lobes

Front 8

What is a fissure?

Back 8

a developmental linear cleft, the result of incomplete fusion of the enamel of adjoining dental lobes

Front 9

What is a pit?

Back 9

is a pinpoin fissure or the junction of several fissures

Front 10

What is the central developmental groove of the premolars?

Back 10

is the demarcation between the facial lobes and the lingual lobe(s)

Front 11

What separates the lingual cusps of mandibular premolars that have two lingual cusps.

Back 11

lingual developmental groove

Front 12

What are the vertical developmental depressions on the facial surfaces of premolars called?

Back 12

mesiobuccal and distobuccal developmental depressions

Front 13

What is the groove called that separates the two buccal and two lingual lobes of maxillary first molar?

Back 13

central developmental groove

Front 14

What groove separates the two buccal cusps on maxillary first molars?

Back 14

the buccal developmental groove

Front 15

What groove separates the mesiolingual and the distolingual lobes on the maxillary first molar?

Back 15

distolingual developmental groove

Front 16

Where are the lobes of the maxillary first molar?

Back 16

-two on the B
-three on the L
***the third lobe in on the cusp of carribelli

Front 17

Where are the lobes on the mandibular first molar?

Back 17

-three on the B
-two on the L

Front 18

What are the names of the mandibular first molar's buccal cusps?

Back 18

-mesiobuccal cusp
-distobuccal cusp
-distal cusp

Front 19

What is the groove called that separates the distal cusp from the distobuccal lobe/cusp on the mandibular first molar?

Back 19

distobuccal groove

Front 20

What is the groove called that separates the distobuccal lobe from the mesiobuccal lobe on the mandibular first molar?

Back 20

buccal groove

Front 21

How many lobes does the mandibular second molar have?
What do they not have that the first mandibular molar does?

Back 21

-4 lobes
-no distobuccal developmental groove and distal lobe

Front 22

What groove separates the buccal lobes from the two lingual grooves on the mandibular molars?

Back 22

the central groove

Front 23

What groove separates the two lingual lobes on the mandibular molars?

Back 23

lingual developmental groove

Front 24

When the teeth are viewed from the side, what type of angulation of the teeth is present?

Back 24

mesial angulation of the teeth
(midline of the teeth tilt towards the mesial)

Front 25

When teeth are viewed from the anterior or posterior aspect the crowns of the max post teeth have a ____________, while the crowns of the mand post teeth have a ____________.

Back 25

-buccal inclination
-lingual inclination

Front 26

The amount of buccal and lingual angulation increases or decreases the more distally the tooth is located in the arch?

Back 26

increases

Front 27

What is the curve of spee?

Back 27

-the curve produced by a line connecting the cusp tip of the maxillary canine and buccal cusp tips of the premolars and molars
-it also occurs in the mandibular arch as a concavity and the maxillary's arch convexity

Front 28

When viewing the posterior teeth from the anterior or posterior aspect, what line is formed?
How is it formed?

Back 28

-Curve of Wilson
-formed by the lingual inclination of the mandibular post teeth and the buccal inclination of the maxillary posterior teeth
-it forms a convexity on the maxillary arch and has a corresponding concavity on the mandibular arch

Front 29

What is the compensating occlusal curvature / sphere of monson?

Back 29

-the spherical plane on the max and mand resulting from the combination of the curve of spee and the curve of wilson
-compared to a mortar and pestle

Front 30

If max and mand casts are intercuspated into maximum intercuspation, what teeth overlap what teeth from a facial aspect?

Back 30

the max ant teeth and B cusps slightly overlap the mand teeth

Front 31

If max and mand casts are intercuspated into maximum intercuspation, what teeth overlap what teeth from a lingual aspect?

Back 31

mand ling cusps slightly overlap the max ling cusps

Front 32

The amount of vertical overlap increases or decreases as the tooth is located more distally in the arch?

Back 32

decreases

Front 33

Do the facio-occlusal and linguo-occlusal line angles in both the max and mand quadrants form a fairly straight continuous imaginary line along the posterior teeth?

Back 33

yes

Front 34

Does the central developmental grooves of the post teeth in both the max and mand quadrants form a fairly straight continuous imaginary line from ant to post?

Back 34

yes

Front 35

What are the facial and lingual boundaries of the occlusal table in post teeth?

Back 35

facio-occlusal and linguo-occlusal lines

Front 36

Are the occlusal tables of the molars slightly wider than the occlusal tables of the premolars even though the molar teeth are much wider faciolingually?

Back 36

yes

Front 37

Where is the additional bulk placed on the max molars?

Back 37

on the lingual aspect of the tooth

Front 38

Where is the additional bulk placed on the mand molars?

Back 38

on the buccal aspect of the tooth

Front 39

What is a line angle?

Back 39

the line formed by the junction of two surfaces

Front 40

What are vertical line angles?

Back 40

line angles formed on the vertical sides of the tooth, formed by the junction of F,L,M,D surfaces

Front 41

Viewing the post teeth from the occlusal, are the facial line angles of the premolars fairly distint or rounded?

Back 41

fairly distinct

Front 42

Viewing the post teeth from the occlusal, are the facial line angles of the molars fairly distint or rounded?

Back 42

rounded

Front 43

Viewing the post teeth from the occlusal, are the lingual line angles of the premolars fairly distint or rounded?

Back 43

rounded

Front 44

Viewing the post teeth from the occlusal, are the lingual line angles of the molars fairly distint or rounded?

Back 44

rounded

Front 45

Viewing the premolar teeth from the facial, what is the shape of the facial line angles?

Back 45

the portion in the occlusal one-third is very distinct and angular, while the portion in the gingival one-third is quite round

Front 46

In which teeth is it easiest to see the converging of the vertical line angles as they move more cervically?

Back 46

premolars and anterior teeth

Front 47

What are the mesial and distal terminations of the occlusal surfaces in posterior teeth?

Back 47

marginal ridges

Front 48

Is it very important that adjacent marginal ridges be the same height?

Back 48

yes

Front 49

The crest of the distal marginal ridge of a tooth should be the same height as what?

Back 49

the mesial marginal ridge of the next tooth distal to it

Front 50

Do two adjacent teeth contact at the crest of the marginal ridges?
Is there a small embrasure occlusal to the proximal contact?

Back 50

-No
-yes

Front 51

What forms the occlusal embrasure of two proximal post teeth?

Back 51

the curved sides of the marginal ridges

Front 52

Where do the marginal ridges slope into from the crest of the ridge?

Back 52

into the respective mesial or distal triangular fossa

Front 53

On the max first premolar buccal view, what is the crown outline?

Back 53

trapezoidal

Front 54

On the max first premolar buccal view, what does the mesial cusp arm of the buccal cusp look like?

Back 54

fairly straight and longer than the distal cusp arm

Front 55

On the max first premolar buccal view, what does the distal cusp arm of the buccal cusp look like?

Back 55

shorter than the mesial cusp arm and more curved

Front 56

On the max first premolar buccal view, what does the mesial outline look like?

Back 56

concave from the CEJ to the mesial contact area, this is a fairly broad convexity

Front 57

On the max first premolar buccal view, where is the mesial contact area?

Back 57

is just cervical to the junction of the occlusal and middle thirds (contact is in the middle third)

Front 58

On the max first premolar buccal view, what does the distal outline look like?

Back 58

it is straighter from the CEJ to the distal contact area than the mesial outline, although still slighlty concave

Front 59

On the max first premolar buccal view, where is the distal contact area?

Back 59

it is located in the middle third as is the mesial contact area

Front 60

On the max first premolar buccal view, in what direction is the buccal cusp tip pointed?

Back 60

it is pointed and located slightly distal to the center of the buccal surface

Front 61

On the max first premolar buccal view, is there a prominent buccal ridge on the buccal surface?

Back 61

yes

Front 62

On the max first premolar buccal view, where are the mesiobuccal and distobuccal line angles very distinct?

Back 62

in the occlusal third of the buccal surface

Front 63

On the max first premolar buccal view, where are the vertical developmental depressions seen?

Back 63

-in the occlusal one-third of the buccal surface
**the mesial depression is the more concave depression

Front 64

On the max first premolar lingual view, is the lingual portion of the crown more narrow or wide mesiodistally than the buccal portion?

Back 64

more narrow

Front 65

On the max first premolar lingual view, what direction is the lingual cusp tip pointed?

Back 65

it is pointed and located mesial to the buccal cusp tip so that the distal cusp arm is longer than the mesial cusp arm

Front 66

What is the crown outline shape of the mesial veiw of the maxillary first premolar?

Back 66

trapezoidal, with the short parallel side of the trapezoid at the occlusal aspect.

Front 67

On the maxillary first premolar mesial view, where is the buccal height of contour?

Back 67

cervical third

Front 68

On the maxillary first premolar mesial view, where is the lingual height of contour?

Back 68

usuallly near the center of the middle one-third

Front 69

On the maxillary first premolar mesial view, how much shorter is the lingual cusp tip than the buccal cusp tip?

Back 69

1mm

Front 70

On the maxillary first premolar mesial view, are the cusp tips located within the confines of the root surfaces, or do they extend beyond the root surfaces?

Back 70

the cusp tips are located within the confines of the root surfaces

Front 71

On the maxillary first premolar, how many have 2 roots and how many have one root?

Back 71

half and half

Front 72

On the maxillary first premolar, are the roots buccal/lingual or mesial/distal?

Back 72

buccal/lingual

Front 73

On the maxillary first premolar mesial view,what does the mesial developmental depression look like?

Back 73

It is a marked concavity just cervical to the contact area and centered on the mesial surface of the crown. This concavity extends onto the mesial root surface

Front 74

On the maxillary first premolar mesial view, tell about the groove that crosses the mesial marginal ridge.

Back 74

is a well defined developmental groove that crosses the mesial marginal ridge just lingual to the mesial contact area and ends just cervical to the crest of the marginal ridge

Front 75

On the maxillary first premolar when the root is bifurcated,is there a long trunk? Why?

Back 75

-yes
-when the root is bifurcated, it is only bifurcated for about one-half its total length

Front 76

On the maxillary first premolar distal view, is there a developmental depression of the distal surface of the crown?

Back 76

no

Front 77

On the maxillary first premolar occlusal view, what is the shape of the occlusal outline?

Back 77

hexagonal

Front 78

Is the crown wider in the buccal third or the lingual third?

Back 78

buccal third

Front 79

On the maxillary first premolar occlusal view, what features are prominent?

Back 79

-buccal ridge
-buccal developmental depressions
-mesiobuccal and distobuccal line angles are very distinct in the occlusal third

Front 80

On the maxillary first premolar occlusal view,the mesiobuccal cusp arm meets the mesial marginal ridge at nearly a ________angle.

Back 80

right

Front 81

On the maxillary first premolar occlusal view, the distobuccal cusp arm meets the distal marginal ridge at an _________ angle.

Back 81

acute

Front 82

Is the mesiolingual cusp arm shorter or longer than the distolingual cusp arm.

Back 82

shorter

Front 83

What divides the occlusal table into buccal and lingual halves?

Back 83

the central developmental groove

Front 84

The two grooves that extend from the mesial and distal pits toward the mesiobuccal and distobuccal line andgles are called what?

Back 84

mesiobuccal and distobuccal developmental grooves respectively

Front 85

Is the buccal triangular ridge distinct?
Is the lingual triangular ridge distinct?

Back 85

-yes
-no

Front 86

In the buccal view of the maxillary second premolar, is it more or less symmetrical compared to the maxillary first premolar?

Back 86

more

Front 87

In the buccal view of the maxillary second premolar, are the mesiobuccal and distobuccal line angles more or less prominant compared to the maxillary first premolar?

Back 87

less

Front 88

In the buccal view of the maxillary second premolar,is there a buccal developmental depression present?

Back 88

no

Front 89

In the buccal view of the maxillary second premolar, is the mesial cusp arm of the buccal cusp shorter or longer than the distal cusp arm?

Back 89

shorter

Front 90

In the buccal view of the maxillary second premolar, where are the mesial and distal contact areas?

Back 90

in the middle thirds

Front 91

In the mesial view of the maxillary second premolar, are the buccal and lingual cusps more nearly the same height compared to the maxillary first premolar?

Back 91

yes

Front 92

In the mesial view of the maxillary second premolar, is there a mesial marginal groove crossing the mesial marginal ridge?

Back 92

no

Front 93

In the mesial view of the maxillary second premolar, does the mesial surface have a marked concavity?

Back 93

no

Front 94

In the mesial view of the maxillary second premolar,are the buccal and lingual cusp tips slightly farther apart compared to the maxillary first premolar?

Back 94

-yes

Front 95

In the mesial view of the maxillary second premolar,where is the buccal height of contour?
Where is the lingual height of contour?

Back 95

-cervical third
-middle third

Front 96

In the occlusal view of the maxillary second premolar, what is the occlcusal outline shape?
What shape is the maxillary first premolar occlusal outline shape?

Back 96

-ovoid
-hexagonal

Front 97

In the occlusal view of the maxillary second premolar, are the mesiobuccal and distobuccal line angles slightly more or less rounded than those of the first premolar.

Back 97

more rounded

Front 98

In the occlusal view of the maxillary second premolar,is there a greater or less lingual convergence than the first premolar?

Back 98

less lingual convergence

Front 99

In the occlusal view of the maxillary second premolar, the occlusal surface have numerous supplemental grooves giving it a what type of appearance?

Back 99

wrinkled

Front 100

In the buccal view of the mandibular first premolar, what is the crown outline seen from the buccal side?

Back 100

"roughly" trapezoidal

Front 101

In the buccal view of the mandibular first premolar,what do the mesial and distal outlines look like?

Back 101

they are similar except that the distal outline is slightly more concave cervical to the contact area

Front 102

In the buccal view of the mandibular first premolar, where are the mesial and distal contact areas?

Back 102

in the middle thirds

Front 103

In the buccal view of the mandibular first premolar, what is the size, shape and position of the buccal cusp tip?

Back 103

-large
-pointed
-mesial to the tooth's midline
***there is ofeen a slight concavity in the distal cusp arm

Front 104

In the buccal view of the mandibular first premolar, tell about the middle buccal lobe

Back 104

it is a prominent developed lobe, termed the buccal ridge, that extends from the cusp tip down the buccal surface of the tooth

Front 105

In the lingual view of the mandibular first premolar, is most of the occlusal surface visible from this view? Why?

Back 105

-yes
-because the occlusal surface slopes dramatically toward the lingual

Front 106

In the lingual view of the mandibular first premolar, in the lingual portions of the mesial and distal surfaces what is between the CEJ and the contact areas?

Back 106

concavities

Front 107

In the lingual view of the mandibular first premolar, what is in alignment with the buccal triangular ridge on the occlusal surface?

Back 107

a very small lingual cusp

Front 108

In the lingual view of the mandibular first premolar, what does the root look like?

Back 108

the root is very narrow on the lingual side and tapers evenly to a pointed apex

Front 109

In the mesial view of the mandibular first premolar, what os the shape of the crown out line?

Back 109

rhomboidal shape

Front 110

In the mesial view of the mandibular first premolar, what is the tip of the buccal cusp centered over?
What is the tip of the lingual cusp in line with?

Back 110

-the root
-the lingual border of the root

Front 111

In the mesial view of the mandibular first premolar, is the buccal outline very convex from the CEJ to the buccal cusp tip?

Back 111

-yes

Front 112

In the mesial view of the mandibular first premolar, where is the buccal outine height of contour?

Back 112

in the cirvical third

Front 113

In the mesial view of the mandibular first premolar, what does the mesial surface look like in general?

Back 113

smooth, flat, often with deep developmental grooves

Front 114

In the mesial view of the mandibular first premolar, where is the lingual height of contour?

Back 114

in the middle third

Front 115

In the distal view of the mandibular first premolar, where is the distal marginal ridge located in relation to the mesial marginal ridge?

Back 115

the distal marginal ridge is located more occlusally and is more horizontal than the mesial marginal ridge

Front 116

In the occlusal view of the mandibular first premolar, what does the occlusal outline look like?

Back 116

the occlusal outline is usually diamond-shaped, but some may be more circular

Front 117

In the occlusal view of the mandibular first premolar, what do the mesiobuccal and distobuccal line angles look like?

Back 117

the line angles are prominent but rounded

Front 118

In the occlusal view of the mandibular first premolar, does the crown converge sharply to the center of the lingual surface from the mesial and distal contact areas?

Back 118

yes

Front 119

In the occlusal view of the mandibular first premolar, are the marginal ridges well developed?

Back 119

yes

Front 120

In the occlusal view of the mandibular first premolar, can the majority of the buccal surface be seen? Why?

Back 120

-yes
-due to the lingual tilt of the crown
***but very little of the lingual surface may be seen

Front 121

In the occlusal view of the mandibular first premolar, are there mesial and distal fossae on the occlusal surface?

Back 121

yes

Front 122

In the occlusal view of the mandibular first premolar, what does the distal fossa look like?
What does the mesial fossa look like?

Back 122

-the distal fossa is larger and has the more classic form of a fossa
-the mesial fossa is linear and extends lingually to become the mesiolingual developmental groove

Front 123

In the occlusal view of the mandibular first premolar,is there a prominent transverse ridge and what is it composed of?

Back 123

-yes
-the buccal triangular ridge and the lingual triangular ridge

Front 124

In the buccal view of the mandibular second premolar, what do the mesial and distal contact areas look like?

Back 124

they are relatively broad and located in the middle third

Front 125

what are the two types of mandibular second premolars?

Back 125

one type has two lingual cusps and the other has only one lingual cusp

Front 126

In the lingual view of the two-cusp type mandibular second premolar,the single large lingual cusp is mesial to what?

Back 126

the buccal cusp tip, allowing the buccal cusp tip to be observed

Front 127

In the lingual view of the two-cusp type mandibular second premolar,is there a lingual developmental groove?
What is present?

Back 127

-no
-a developmental depression where the lingual cusp's distal cusp arm joins the distal marginal ridge

Front 128

In the lingual view of the three-cusp type mandibular second premolar,what are the two cusps on the lingual called?

Back 128

the mesiolingual and distolingual cusp

Front 129

In the lingual view of the three-cusp type mandibular second premolar,is the mesiolingual cusp larger and longer or is the distolingual larger and longer?

Back 129

mesiolingual cusp is larger and longer

Front 130

In the lingual view of the three-cusp type mandibular second premolar, there is a groove separating the two cusps that extends to where?

Back 130

it extends from the occlusal surface onto the lingual surface

Front 131

In the mesial view of the mandibular second premolar,is the crown and root wider buccolingually or narrower than those of the first premolar?

Back 131

wider

Front 132

In the mesial view of the mandibular second premolar, where is the buccal cusp tip located compared to the mandibular first premolar?

Back 132

the buccal cusp tip is located more to the buccal and shorter than in the first premolar

Front 133

In the mesial view of the mandibular second premolar, the marginal ridge is at _________ angles to the long axis of the tooth.

Back 133

right

Front 134

In the mesial view of the mandibular second premolar, where is the buccal height of contour?
Where lingual height of contour?

Back 134

-cervical third
-middle third

Front 135

In the occlusal view of the two cusp type mandibular second premolar, what is the occlusal outline shape?

Back 135

rounded

Front 136

In the occlusal view of the three cusp type mandibular second premolar, what is the occlusal outline shape?

Back 136

-square

Front 137

In the occlusal view of the two cusp type mandibular second premolar,what does the central developmental groove look like?

Back 137

is most often a U or H shape, but may be straight

Front 138

In the occlusal view of the two cusp type mandibular second premolar,what do the mesiolingual and distolingual line angles look like?

Back 138

they are more rounded, and there is one well developed lingual cusp tip mesial to the midline

Front 139

In the occlusal view of the three cusp type mandibular second premolar,which cusps are what size?

Back 139

-the buccal cusp is the largest
-the mesiolingual is the next largest
-the distolingual is the smallest

Front 140

In the occlusal view of the three cusp type mandibular second premolar,does each cusp have a triangular ridge and what separates the cusps?

Back 140

-yes
-developmental grooves

Front 141

In the occlusal view of the three cusp type mandibular second premolar,what do the grooves look like collectively?
What makes up that look?

Back 141

-Y
-the mesial and distal portions of the central developmental groove and the lingual developmental groove form the Y
-the central pit is at their intersection

Front 142

The maxillary first molar buccal view, what is the crown shape outline?

Back 142

trapezoidal

Front 143

In the buccal view of the maxillary first molar, what does the mesial outline look like?

Back 143

the mesial outline is fairly straight from the CEJ to the curvature of contact area

Front 144

In the buccal view of the maxillary first molar, where is the mesial contact?

Back 144

in the middle third of the anatomical crown just cervical to the junction with the occlusal third

Front 145

In the buccal view of the maxillary first molar, what shape is the distal outline?

Back 145

convex

Front 146

In the buccal view of the maxillary first molar, where is the distal contact?

Back 146

in the middle of the middle third

Front 147

In the buccal view of the maxillary first molar, how many buccal cusps are there and what do they look like?

Back 147

-there are two buccal cusps
-the mesiobuccal cusp is broader and higher than the distobuccal cusp

Front 148

In the buccal view of the maxillary first molar, what separates the two buccal cusps?

Back 148

the buccal groove

Front 149

In the buccal view of the maxillary first molar, can you see all three roots from this view? What do the roots look like?

Back 149

-yes
-the lingual root is the lingest and the two curved buccal roots are about the same lenght

Front 150

In the buccal view of the maxillary first molar,how long is the root trunk?

Back 150

4mm long

Front 151

In the buccal view of the maxillary first molar, are the roots about twice as long as the crown?

Back 151

yes

Front 152

In the lingual view of the maxillary first molar, is there a lingual depression and what does it look like?

Back 152

-yes
-the lingual depression starts on the cervical third of the crown and progresses down the lingual root

Front 153

In the lingual view of the maxillary first molar, tell about the mesiolingual cusp.

Back 153

the mesiolingual cusp is the longest and its mesiodistal width is about three-fifths of the lingual surface

Front 154

In the lingual view of the maxillary first molar,tell about the cusp of carabelli

Back 154

-is a fifth cusp on the lingual surface
of the mesiolingual cusp about 2mm cervical to the cusp ridges of the mesiolingual cusp

Front 155

In the mesial view of the maxillary first molar, what does the buccal outline look like?

Back 155

the buccal outline is fairly straight with its height of contour in the cervical third

Front 156

In the mesial view of the maxillary first molar, what does the longual outline look like?

Back 156

the lingual outline is very curved from its height of contour in the middle third

Front 157

In the mesial view of the maxillary first molar,tell about the mesial contact area.

Back 157

the mesial contact area is buccal to the buccolingual center of the crown, and there is a slight concavity apical to the contact area that extends slightly onto the root trunk

Front 158

In the mesial view of the maxillary first molar, which root is the longest?

Back 158

the lingual root is the longest and diverges lingually from the crown

Front 159

In the mesial view of the maxillary first molar,tell about the mesiobuccal root.

Back 159

the mesiobuccal root is broad buccolingually and hides the distal root from this view

Front 160

In the distal view of the maxillary first molar, is the distal one-half of the crown narrower buccolingually than the mesial half? What does this allow?

Back 160

-yes
-this allows some of the mesial half of the tooth to be visible

Front 161

In the distal view of the maxillary first molar, are all three roots visible and which cusp is the smallest?

Back 161

-yes
-the distobuccal root is smaller than the other two

Front 162

In the occlusal view of the maxillary first molar, what is the crown outline shape?

Back 162

rhomboid

Front 163

In the occlusal view of the maxillary first molar, is the crown wider buccolingually than mesiodistally?

Back 163

-yes

Front 164

In the occlusal view of the maxillary first molar,where is the mesial contact area?

Back 164

it is buccal to the buccolingual center of the crown

Front 165

In the occlusal view of the maxillary first molar, is the mesial one-half of the crown wider buccolingually than the distal one-half?

Back 165

yes

Front 166

In the occlusal view of the maxillary first molar, does this tooth have a faciolingual taper?

Back 166

-no
-the crown is mesiodistally wider lingual to the contact areas than buccal to the contact area

Front 167

In the occlusal view of the maxillary first molar, what are the sizes in succession of the cusps?

Back 167

-the mesiolingual cusp is the largest
-mesiobuccal cusp is next
-distobuccal cusp is next
-disto lingual cusp is next
-the fifth cusp is the smallest

Front 168

In the occlusal view of the maxillary first molar, what is formed by the cusp arms of the three major cusps, the mesial marginal ridge and the oblique ridge?

Back 168

-a triangle
**this is characteristic of all maxillary molars

Front 169

In the buccal view of the maxillary second molar, is the crown shorter and narrower than that of the maxillary first molar?

Back 169

yes

Front 170

In the buccal view of the maxillary second molar, are the roots closer together and inclined more to the distal than in the first molar?

Back 170

yes

Front 171

In the buccal view of the maxillary second molar, where are the mesial and distal contact areas?

Back 171

in the middle third

Front 172

In the lingual view of the maxillary second molar, is the distolingual cusp smaller than in the first molar?

Back 172

yes

Front 173

In maxillary second molar, is there a fith cusp?(cusp of carabelli)

Back 173

no

Front 174

In the mesial view of the maxillary second molar, the buccolingual diameter about the same as that of the first molar but what is different?

Back 174

the crown is shorter

Front 175

In the mesial view of the maxillary second molar, do the roots have a great buccolingual spread as in the first molar?

Back 175

no

Front 176

In the mesial view of the maxillary second molar, where is the buccal height of contour?
Where is the lingual height of contour?

Back 176

-cervical third
-middle third

Front 177

In the occlusal view of the maxillary second molar, what is the outline of the crown?

Back 177

more distinctly rhomboid-shaped than that of the first molar

Front 178

In the occlusal view of the maxillary second molar, is the buccal half larger than the lingual half?
Is the mesial half larger than the distal half?

Back 178

-yes
-yes

Front 179

In the buccal view of the mandibular first molar, what is the crown outline shape?

Back 179

roughly trapezoidal

Front 180

In the buccal view of the mandibular first molar, where are the mesial and distal contacts?

Back 180

in the middle third

Front 181

In the buccal view of the mandibular first molar, what are the names of the two developmental grooves?

Back 181

the mesiobuccal and distobuccal developmental grooves

Front 182

In the buccal view of the mandibular first molar, what does the root portion look like?

Back 182

it has a mesial root, distal root, and approximately a 3 millimeter root trunk

Front 183

In the buccal view of the mandibular first molar, What does the mesial root look like?
What does the distal root look like?

Back 183

-the mesial root is curved and angles distally
-the distal root is relatively straight

Front 184

In the lingual view of the mandibular first molar, what does the mesial outline look like?

Back 184

the mesial outline is convex from the CEJ to the broad contact area

Front 185

In the lingual view of the mandibular first molar,what separates the mesiolingual and distolingual cusps and are they about the same size?

Back 185

-the lingual developmental groove
-yes

Front 186

In the mesial view of the mandibular first molar, What is the shape of the crown outline?

Back 186

rhomboidal, which is characteristic of mandibular posterior teeth

Front 187

In the mesial view of the mandibular first molar, what does the buccal outline look like?
Where is the buccal height of contour?

Back 187

-the buccal outline is convex
-in the cervical third

Front 188

In the mesial view of the mandibular first molar, what does the lingual outline look like?
Where is the lingual height of contour

Back 188

-the lingual outline is fairly straight from the CEJ to the height of contour then fairly rounded to the cusp tips
-middle third

Front 189

In the mesial view of the mandibular first molar, does the occlusal table appear to be displaced lingually?

Back 189

yes

Front 190

In the occlusal view of the mandibular first molar, what is the crown outline shape?

Back 190

pentagonal

Front 191

In the occlusal view of the mandibular first molar, what is the succession of size of the cusps?

Back 191

-mesiobuccal cusp is the largest cusp
-followed by the two lingual cusps
-the distobuccal cusp
-the distal cusp is the smallest

Front 192

In the occlusal view of the mandibular first molar, is the crown wider mesiodistally than buccolinguaally?

Back 192

yes
***this is in reverse in comparison to the maxillary molars

Front 193

In the buccal view of the mandibular second molar, what separates the mesiobuccal and distobuccal cusps?

Back 193

the buccal developmental groove

Front 194

In the buccal view of the mandibular second molar, what do the roots look like in comparison to those of the mandibular first molar?

Back 194

the roots are shorter and more parallel, but angle more acutely to the distal than those of the mandibular first molar

Front 195

In the buccal view of the mandibular second molar, where are the mesial and distal contact areas?

Back 195

in the middle third

Front 196

In the mesial view of the mandibular second molar, where is the buccal height of contour?
Where is the lingual height of contour?

Back 196

-in the cervical third
-in the middle third

Front 197

In the occlusal view of the mandibular second molar, what shape is the crown outline?

Back 197

is a roughly rectangular outline that converges slightly to the lingual

Front 198

In the occlusal view of the mandibular second molar, how many cusps are present?

Back 198

4

Front 199

In the occlusal view of the mandibular second molar, is the distobuccal cusp as large or larger than the mesiobuccal cusp?

Back 199

yes

Front 200

In the occlusal view of the mandibular second molar, the developmental grooves divide the crown into what?

Back 200

four roughly equal parts

Front 201

In the occlusal view of the mandibular second molar, where is the distal contact area centered?

Back 201

buccolingually