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dental anatomy > mandibular molars > Flashcards

mandibular molars Flashcards

1
Q

Has the greatest mesiodistal dimension of any tooth in the mouth

A

mandib 1st molar

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2
Q

number of cusps for

mand 1st molar

A

5

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3
Q

Mand 1st molar

A

Anchor tooth of Mandibular arch

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4
Q

3 buccla and 2 lingual cusps

A

mand 1st molar

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5
Q

4 cusps

A

mand M2

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6
Q

tf Mand M2 is smaller than mand M1

A

T

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7
Q

C-shaped canal is a special feature of some

A

lower second molars.

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8
Q

Some or all of the canal orifices are joined in the form of a groove or isthmus with a shape of the letter C.

A

mand M2

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9
Q

The continuous C-shaped canal

A

Type I C shaped canal

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10
Q

type 2 c shaped canal

A

The semicolon shaped canal

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11
Q

Two discrete and separate canals.

A

Type III : c shaped canal

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12
Q

the shape is an uninterrupted ‘C’ with no separation or division.

A

c1 melton

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13
Q

the canal shape resembles a semicolon resulting from a discontinuation of the ‘C’ outline.

A

Category C2: Melton

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14
Q

two separated canals.

A

Category C3a:

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15
Q

three separated canals. C

A

Category C3b: Melton

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16
Q

Category C4:

A

only one round or oval canal.

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17
Q

PERICORONITIS (Acute or Chronic)

A

Inflammation of the soft tissues surrounding the crown of a partially erupted tooth

Mand M3

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18
Q

tf Third Molars Have a High Incidence of Pathology

A

F

Not more than 12% of impacted teeth have associated pathology

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19
Q

tf Early Removal of Third Molars Is Less Traumatic

A

F

Early removal of third molars is actually more traumatic and painful than leaving asymptomatic, nonpathologic teeth in situ

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20
Q

tf Third molars do not possess sufficient force to move other teeth or cause crowding, overlapping

A

T

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21
Q

tf There is no evidence of a significant increase in third-molar pathology with age

A

T

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22
Q

tf There is Little Risk of Harm in the Removal of Third Molars

A

F

Days of “standard discomfort or disability”—pain, swelling, bruising, and malaise result postoperatively, and more than 11,000 people suffer permanent paresthesia

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23
Q

mand 1st molar

has — buccal cusp separateed by — grooves

A

3;2

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24
Q

names of grooves that separate the 3 buccal cusps of mand

1st molar

A

mesiobuccal developmental groove and distobuccal developmental groove

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25
Q

order of size of 3 buccal cusps of mand M1

MB

D

DB

A

MB>DB>D

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26
Q

tf from buccal aspect of mand M1

lingual cusp is shorter than buccal cusp

A

F

is longer

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27
Q

which are more blunt on mand M1

buccal or lingual cusp

A

buccal cusp

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28
Q

most blunt buccal cusp of mand M1

MB

DB

D

A

MB

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29
Q

tf 4 cusps are visible from buccal side of mand M1

A

F

all 5 cusp visible

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30
Q

Mesiobuccal groove slightly —– to crown center mesiodistally of Mand M1 buccally

A

mesial

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31
Q

Mesiobuccal groove of Mand M1

A

extends halfway down the buccal surface terminating with pit

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32
Q

mesial to root bifurcation

A

MB groove

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33
Q

Distobuccal groove near DB line angle runs —–

to distal root

Mand M1

A

Distobuccal groove near DB line angle runs parallel to distal root

MAnd M1

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34
Q

sl. longer than MB groove

(mand M1 buccal view)

A

DB groove

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35
Q

tf from buccal view of Mand M1

all of Mesial profile convex

A

F

cervical 1/3 which appears somewhat concave

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36
Q

tf distal profile (buccal view of Mand M1)

straight al the way through

A

F

Distal profile straight until convex at D contact area

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37
Q

Buccal cervical ridge runs —— in cervical third of crown.

(buccal view of Mand M1)

A

Buccal cervical ridge runs mesiodistally in cervical third of crown

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38
Q

Slight depressed area just occlusal to CEJ of Mand M1

A

Slight —– area just occlusal to CEJ(buccal view)

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39
Q

Buccal CEJ slightly —— apically

(mand M1 buccal view)

A

Buccal CEJ slightly curved apically

(mand M1 buccal view)

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40
Q

Buccal CEJ of Mand M1

A

may dip toward bifurcation midbuccally

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41
Q

tf from buccal view of Mand M!

3 roots are visible

A

F

2 roots visible

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42
Q

mesial root curves —– half way down;

Mand M1

A

mesial root curves distally half way down;

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43
Q

mesial root of Mand M1

has

A

Often deep developmental depressions on both M&D aspects (buccal view)

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44
Q

distal root of MAnd M1 projects distally

(Mand M1)

A

and can turn mesially, distally, or not at all

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45
Q

root trunk

A

3mm wide

(vertically)

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46
Q

lingual aspect of Mand M1

tf MAnd m1 appears taller from lingual

A

T

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47
Q

Lingual aspect of Mand M1

A

taller root trunk

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48
Q

4mm

A

root trunk of MAnd M1 lingual

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49
Q

tf

Crown surface of Mand M1 longer mesiodistally than buccal aspect

A

f

Crown surface smaller mesiodistally than buccal aspect

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50
Q

lingual groove of Mand M!

A

separates Two cusps of approximately equal size

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51
Q

tf lingual groove of Mand M1 is shorter than buccal groove

and has no lingual pit

A

T

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52
Q

bifurcatin of Mand M1 in line with

A

lingual groove

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53
Q

taller and sharper

buccal or lingual cusp of Mand M1

A

lingual cusp

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54
Q

ML

A

tallest cusp of lingual cusp s of Mand M1

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55
Q

tf mesial and distal profiles of Mand M1 are convex throughout entire lingual aspect

A

T

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56
Q

flat CEJ of Mand M1

A

in lingual view

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57
Q

tf from lingual aspect of Mand M1 no buccal cusp is visible

A

F

part of buccal cusp is visible

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58
Q

on Mand M1

from which side are roots narrower

lingual or buccal

A

lingual

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59
Q

crown of Mand M1 from mesial

A

rhomboid

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60
Q

mesial aspect of Mand M1

A

crown tilts to lingual in relation to long axis

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61
Q

which cusp taller from mesial view of Mand M!

ML or MB

A

ML

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62
Q

ML and MB cusps

A

well within borders of mesial root

of Mand M1(mesial)

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63
Q

mesial marginal ridge has

A

mesial marginal groove

on Mand M1 (mesial view)

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64
Q

distance of mesial marginal ridge of mand M1 in comparison to height of cusps(mesial view)

A

1 mm

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65
Q

mand M!

Mesial root very broad —– with shallow—— or —-

A

Mesial root very broad buccolingually with shallow concavity or depression

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66
Q

Buccal profile of Mand M1

A

convex

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67
Q

Lingual profile of Mand M1

A

convex

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68
Q

CEJ of Mand m1 ——- or slightly —— toward occlusal

A

CEJ straight or slightly curved toward occlusal

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69
Q

Usually —– or slightly —— area of mand M1 in cervical third of crown

A

Usually flattened or slightly concave area in cervical third of crown

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70
Q

mesial aspect of Mand M1

A

Contact area centered

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71
Q

contact area of Mand M1

A

slightly buccal and occlusal to midpoint of crown

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72
Q

distal aspect of Mand M1

A

Smaller buccolingually than mesial surface

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73
Q

mand m1

A

tapers dramatically towards distal

(distal view)

74
Q

tf mesial and distal view of Mand M!

A

Buccal and lingual profiles are similar

75
Q

distal view of Mand M!

A

Portions of all five cusps visible

76
Q

from distal view of mand m1

which cusp is most lingually positioned

D

DB

DL

A

D cusp

77
Q

DB line angle of mand M1

A

DB groove visible near

78
Q

total surfaces vissible from distal view of mand m1

A

4

facial , distal , occlusal ,distal surface of mesial root

79
Q

tf mand m1 distal view; distal marginal ridge is centered

A

F

80
Q

tf

mand m1 distal view

Distal marginal ridge much longer than mesial marginal ridge

A

F

Distal marginal ridge much shorter than mesial marginal ridge

81
Q

midpoint of Mand M1(distal view)

A

distal marginal groove

82
Q

distal contact of Mand M1

A

facial to center

83
Q

Mand M1 distal view

A

Distal root narrower buccolingually with shallow distal depression

84
Q

Distal root of mand m1 has continuous —- with sharper —- than mesial root

A

Distal root has continuous taper with sharper apex than mesial root

85
Q

from occlusal view of mand M1

A

pentagon outline shape

86
Q

tf mand m1

Wider mesiodistally than buccolingually

A

T

87
Q

which side of Mand M1 is wider mesiodistally

A

buccal

88
Q

which side of Mand M1 is widest buccolingually

A

mesial

89
Q

cusp slopes and 2 marginal ridges of mand M1

A

border Occlusal table

90
Q

which side of Mand M1 is more visible from occlusal

buccal or lingual

A

buccal

91
Q

arrange the following cusps in terms of size of Mand M1 from occlusal

MB

DL

DB

D

ML

A

MB>ML>DL>DB>D)

92
Q

Inner —– ridges of cusps shown from occlusal of Mand M1

A

Inner triangular ridges of cusps shown from occlusal of Mand M1

93
Q

name the three fosa visible from occlusal of MAnd M1

A

centrall

distal

mesial

94
Q

which fossa of mand M1 contain central pit

A

central fossa

95
Q

shallow pits of mand m1 onf occlusal view

A

mesial and distal triangular fossae

96
Q

from occlusal view of Mand M1 name the types of grooves

A

MB DB

central

lingual

97
Q

tf Occlusal view; mesial marginal grove wider than distal marginal groove of mand M1

A

t

98
Q

from the occlusal view of mand M1 which side does the crown converge

A

lingually

99
Q

from occlusal view of mand m1

which side of mand m1 shows straighter outline with little

taper; mesial or distal

A

mesial

100
Q

T

cervical cross section of mand m1

Wider mesiodistally than buccolingually

A

T

101
Q

cross section of mand M1

root trunk

A

contain facial and lingual depressions

102
Q

roots of mand m1

mesial

A

has two pulp canals (B and L)

103
Q

D root of mand m1

A

one pulp canal but often two (B and L)

104
Q

tf only mesial root of mand m1

wider buccolingually than mesiodistally

A

F

both mesial and distal

105
Q

longitudinal grooves

A

developmental depression of mand m1 on mesial and distal surface of mesial and distal roots

106
Q

tf

Mand M1 Mesial root broader and slightly longer than distal root

A

t

107
Q

mesial root of mand m1

A

projects mesially from CEJ to middle third of root,

then curves slightly to the distal;

108
Q

mand m1 distal root

A

distal root smaller; projects distally

109
Q

mand m2 buccal aspct

A

Smaller than M1, larger than M3

110
Q

tf from buccal aspect of mand m2 crown and is shorter than m1

A

T

111
Q

buccla grove of mand m2 (buccal aspect0

A

separates MB and DB cusps

112
Q

tf MB cusp > DB cusp of mand m2

A

T

113
Q

tf buccal aspect of mand m2 has a buccal pit

A

F

nill

114
Q

tf from buccal view of mand m2

all 3 cusp visible

A

F

all 4

115
Q

buccal view of mand m2

—– groove and —- in line with each other

A

Buccal groove and bifurcation in line with each other

116
Q

tf huge curvature in mand m2 CEJ from buccal view

A

F

no curvature , straight

117
Q

from buccal view of mand m2

which side is roudned

mesial or distal

A

distal

118
Q

which contact of mand m2 (buccal veiw)

closer to junction of middle and occlusal thirds

mesial or distal

A

Mesial contact closer to junction of middle and occlusal thirds

119
Q

tf

mand m2 Roots closer together and show greater distal inclination

A

T

120
Q

which root is longer from buccal view of mand M2

mesial or distal view

A

mesial root

121
Q

lingual aspect of mand m2

A

Crown shorter than M1 and narrower mesiodistally

122
Q

equal in length mesiodistally (mand m2)

A

Lingual width mesiodistally almost equal to buccal width

123
Q

taper to lingual

A

lingual aspect of mand m2

124
Q

name the 2 prominent cusp visible of mand m2 from lingual aspect

A

ML and DL

125
Q

tf from lingual aspect of mand m2

DL cusp > ML cusp

A

F

ML>DL

126
Q

tf lingual cusp of mand m2 are sharper than buccal cusp

A

T

127
Q

Lingual —– groove in line with —–

of mand m2(lingual view)

A

Lingual developmental groove in line with bifurcation

of mand m2(lingual view)

128
Q

tf root trunk is longer on buccal aspect than lingual aspect of mand m2

A

F

lingual aspect

129
Q

mesial aspect of mand m2

A

Crown outline similar to M1 (rhomboidal or parallelogram

130
Q

tf mand m2 has narrower occlusal table than m1 (mesial veiw)

A

T

131
Q

short and shallow

A

mesial marginal ridge of mand m2

(mesial veiw)

132
Q

mand m2

ML cusp—- than MB cusp

A

mand m2

ML cusp taller than MB cusp

133
Q

from mesial view

which cusp more centered over root

MB or Ml cusp

A

MB cusp

134
Q

Buccal cervical ridge of mand m2 —- pronounced than M1

A

Buccal cervical ridge of mand m2 less pronounced than M1

135
Q

Mesial contact of mand m2 closer to —- of middle and occlusal thirds(mesial view)

A

Mesial contact of mand m2 closer to junction of middle and occlusal thirds

136
Q

which height of contour of MAnd M2 is more occlusally positioned

lingual or buccal ?

A

Lingual height of contour more occlusally positioned

137
Q

mesial view of mand M2

A

Root narrower than M1 with sharper apex

138
Q

distal view of mand m2

A

Distal marginal ridge more gingivally positioned than mesial

139
Q

tf from distal view less occlusal table is visible than mesial view

A

F

more is visible

140
Q

tf only 2 cusps of mand m2 are visible from distal view of mand m2

A

F

all 4

141
Q

from distal view of mand m2

A

no distal cusp or DB groove

142
Q

tf distal and mesial surface of mand m2 are same size

A

F

Distal surface is almost as large as mesial (but not quite)

143
Q

distal contact area of mand m2

A

more centered

144
Q

narrower and poiitned tip

A

mand m2 (distal view)

145
Q

root mand m2 (distal view)

A

uniformly convex

146
Q

tf occusal view of mand m2 has a hexgonal shape

A

F

rectangular

147
Q

from occlusal view of mand m2 which side is more rounded

distal or mesial

A

distal

148
Q

arrange the cusps of mand m2 from large to small

MB

DB

DL

ML

A

MB>ML>DB>DL

149
Q

which cusps of mand m2 are closer together

distal or mesial

(occlusal view)

A

mesial cusp

150
Q

number of grooves of mand m2 and type

A

3

central

buccal

lingual

151
Q

types of fossa of mand m2

A

Central fossa, mesial and distal triangular fossae

152
Q

which fossa of mand m2 has deepest pits

Central fossa, mesial or distal triangular fossa

A

central

153
Q

occlusal view of mand m2

A

Proximal contacts in middle 1/3

154
Q

Mesial third of crown slightly —- buccolingually than distal third

of mand m2 occlusal

A

Mesial third of crown slightly wider buccolingually than distal third

155
Q

occlusal of mand m2

buccal third —– mesiodistally than lingual third

A

buccal third wider mesiodistally than lingual third

156
Q

roots of mand m2

A

Similar to M1 but usually shorter and closer together

157
Q

tf roots of mand m2

are only separate

A

f

Occasionally may be partially or totally fused (with C-shaped canal) or further apart like M1

158
Q

Wider mesiodistally than buccolingually

A

cevical cross section of mand m2

159
Q

which side of mand m2 is wider buccolingually

mesial and distal

A

(mesial half wider buccolingually

160
Q

2;1

A

canals in mesia vs distal root of mand m2

161
Q

bifurcation of mand m2

A

has Facial and lingual depressions ass. with it

162
Q

c shaped canal of mand m2

A

The name comes from the appearance of the pulp chamber floor when viewed from above.

163
Q

tf Mandibular Third Molar variable only in size

A

F in size and shape

164
Q

congenitally missing

A

mand molar 3

165
Q

can resemble m1 or m2

A

mand m3

166
Q

tf crown and root of mand m3 is larger than m1 and m2

A

F

smaller

167
Q

occlusal of mand m3 tapering occurs

A

to distal

168
Q

MAnd m3 ;

Occlusal groove pattern variable with more ——

grooves

A

Occlusal groove pattern variable with more supplementary grooves

169
Q

tf mand m3 is square shape

A

f

round shape

170
Q

occlusal of mand m3

A

has 4 cusps

171
Q

mand m3 ; which half is wider buccolingually

mesial or distal?

A

mesial half wider buccolingually

172
Q

tf mand m3

crown; root= 1;1.5

A

t

1;1

173
Q

Bulbous outline from proximal, with small occlusal table

A

mand m3

174
Q

mand m3

cusp tips may be —– together than M1 and M2

A

mand m3

cusp tips may be closer together than M1 and M2

175
Q

tf mand m3

Roots taper dramatically toward apex

A

T

176
Q

short, fused, or compressed

A

roots of mand m3

177
Q

distal inclination

A

mand m3 roots

178
Q

smallest and shortest of all mandibular molar roots

A

distal root of mand molar 3

179
Q

cervical cross section of mand m3

A

2 canals in mesial root

1 canal in distal root

180
Q

Root outline tapered toward the distal

A

mand m3 cervical cross section

181
Q
A

dental anatomy (12 decks)

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