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NBDE Pt. I > Dental Morphology > Flashcards

Dental Morphology Flashcards

1
Q

2nd tallest CROWN in mouth

A

Mx CI

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2
Q

1st tallest CROWN in mouth

A

Mn Canine

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3
Q

3rd tallest CROWN in mouth

A

Mx Canine

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4
Q

All permanent incisors erupt with…

A

3 mamelons

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5
Q

Canines or primary incisors do not erupt with…

A

mamelons

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6
Q

I Just Jacked Michael Jackson’s Moped

A

Contacts from Mx CI to Canine

IJ - JM - JM

J = j(x) I & M

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7
Q

Least likely to have a divided pulp canal

A

Mx CI Root

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8
Q

Lends itself well to rotation w/ extraction forceps during surgical removal

A

Mx CI Root

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9
Q

M & D pulp horns are more likely to be found in…

A

Mx CIs

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10
Q

In X-section – root is triangular with base of triangle located faciallly, apex located lingually, MESIAL SIDE LONGER THAN DISTAL SIDE

A

Mx CI Root

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11
Q

T/F, Mx CI has narrowest incisal/occlusal embrassure of ALL Mx teeth

A

TRUE

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12
Q

T/F, Of all teeth - the GREATEST INCISAL CURVATURE of a cervical line [CEJ] is on the MESIAL SURFACE of Mx Centrals (more so than Mn Centrals)

A

TRUE

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13
Q

Which anterior tooth has the LONGEST and WIDEST crown?

A

Mx CI

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14
Q

Anatomical features include cingulum, mamelons, marginal ridges, cervical ridges, triangular ridges, and cuspal ridges

A

FALSE. Missing lingual ridges and lingual fossa and lingual ridge

Triangular ridges or cuspal ridges do not exist

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15
Q

T/F, Incisal ridge of Mx CI crown is on line with the CENTER OF THE ROOT

A

TRUE

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16
Q

T/F, Mx CI prominent cingulum located off-center towards the DISTAL

A

TRUE

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17
Q

Which tooth has the greatest axial inclination relative to the occlusal plane?

A

Mx CI

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18
Q

Which is least likely to have a divided pulp canal?

A

Mx CI

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19
Q

Which tooth in mouth shows the least anatomy?

A

Mn CI (lingual is smooth and nearly lacking in any anatomy)

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20
Q

Smallest permanent tooth

A

Mn CI

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21
Q

Narrowest mesio-distally tooth

A

Mn CI

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22
Q

Most symmetrical tooth

A

Mn CI

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23
Q

Smallest facial embrasure in the mouth

A

Mn CI – may be the same size as the lingual embrasure, making it an EXCEPTION to the rule that lingual embrasures are always larger than facial

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24
Q

Lingual embrasures are always larger than facial embrasures

A

Mostly TRUE for all teeth, untrue with Mn CI

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25
Q

First SUCCADANEOUS tooth (meaning it replaces primary teeth)

A

Mn CI

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26
Q

6 year molars are the 1st permanent teeth, BUT do not qualify as “succedaneous”

A

They do not replace primary teeth

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27
Q

The Mn CI is the only mandibular anterior which has both its mesial and distal contact points at the same level.

A

TRUE. Mandibular lateral as M/D contact points in the incisal third but the distal contact point is LOW in the incisal third

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28
Q

The incisal edge is lingual to the long axis of the tooth, so from an incisal view less of the lingual side is visible than the facial surface

A

Mn CI - weird way of saying = incisal ridge slightly lingual of the faciolingual bisector

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29
Q

Shortest rooth

A

Mn CI

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30
Q

40% have 2 canals or double PDL spaces

A

Mn CI

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31
Q

Most common lower anterior with multiple CANALS

A

Mn CI (40% have 2 canals/double PDL space)

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32
Q

Most likely anterior with multiple ROOTS/bifurcated

A

Mn Canine

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33
Q

Flat mesio-distally and a distal concavity

A

Mn CI root

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34
Q

The pulp appears narrower from the facial view than from the interproximal view.

A

Mn CI root

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35
Q

A cross-section at midroot of a permanent Mn CI is likely to show that the pulp cavity is flattened mesio-distally.

A

TRUE

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36
Q

When viewed from the incisal - mesial and distal outlines are asymmetrical

A

Mx Canine occlusal outline

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37
Q

Longest tooth

A

Mx Canine

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38
Q

Longest root

A

Mx Canine

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39
Q

Longest Crown

A

Mn Canine

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40
Q

2nd Longest Crown

A

Mx CI

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41
Q

3rd Longest Crown

A

Mx Canine

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42
Q

Tooth is wider faciolingually (FL) than mesiodistally (MD)

A

Mx Canine

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43
Q

Largest faciolingual dimension of all ANTERIOR teeth

A

Mx Canine

*Anterior = key word; posterior teeth can be bigger

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44
Q

Widest mesiodistally are

A

Mx CIs and CLs

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45
Q

Wider mesiodistal dimension of the crown on the facial than the lingual

A

Mx Canine

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46
Q

Occlusal outline is asymmetrial

A

Mx Canine

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47
Q

Mx Canine for crown size?

A

3rd place

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48
Q

No mamelons/4 lobes

A

Mx Canine

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49
Q

Does not have lingual fossa; has a lingual ridge which splits the lingual fossa into the mesial fossa and distal fossa

A

Mx Canine

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50
Q

No developmental depressions on the lingual

A

Mx Canine, developmental depressions are on the facial

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51
Q

The structure immediately mesial to the distolingual (DL) fossa is the lingual ridge

A

Mx Canine

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52
Q

The structure immediately distal to the mesiolingual (ML) fossa is the lingual ridge

A

Mx Canine

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53
Q

The mesial and distal fossae meet the proximal surfaces of the tooth that the mesial and distal marginal ridges

A

Mx Canine

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54
Q

The structure immediately mesial to the mesiolingual fossa is the mesial marginal ridge

A

Mx Canine

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55
Q

The facial cusp has a mesial cusp slope that is shorter than the distal cusp slope.

A

TRUE FOR ALL TEETH, EXCEPT…. PRIMARY Mx Canine and permanent Mx 1st PM

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56
Q

Cusp tip may be centered or slightly facial of the faciolingual long axis bisector

A

Mx Canine

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57
Q

From an incisal view, which surface is more visible on a Mx Canine?

A

Lingual more visible- because the cusp tip of Mx canines are slightly facial

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58
Q

Longest root

A

Mx Canine

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59
Q

Pulp cavity has its widest dimension faciolingually in the cervical third of the crown.

A

Mx Canine

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60
Q

Mx canine pulp cavity has its widest dimension faciolingually in the…

A

Cervical third of the crown

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61
Q

Canine eminance

A

Roots of the Mx canines dictate alveolar wall morphology, although they are under bone

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62
Q

Least likely tooth to have 2 roots among canines and PM

A

Mx canine

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63
Q

Pulp cavity in M/D section is pointed at its incisal limit

A

Mx Canine

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64
Q

Pulp cavity in M/D section of Mx Canine is _____ at its incisal limit

A

POINTED

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65
Q

Least likely to be extracted

A

Mx canine - due to long root

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66
Q

Has 3rd longest crown

A

Mx canine - behind the Mx CI and Mn Canine

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67
Q

Most prominent labial ridge

A

Canines

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68
Q

Longest root

A

Mx canine

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69
Q

Longest tooth inciso-apically

A

Mx canine

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70
Q

Widest anterior tooth bucco-lingually

A

Mx canine - all posterior teeth are wider buccolingually especially the Mx 1st Molar ( = widest in the mouth)

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71
Q

Mx canine B/L outline

A

Pentagonal

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72
Q

Mx canine M/D outline

A

Triangular

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73
Q

Mx canine incisal

A

Diamond + asymmetric

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74
Q

Mx canine M contact pt

A

J(x) (I & M)

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75
Q

Mx canine D contact pt

A

Middle

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76
Q

Lingual ridge

A

Mx canine

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77
Q

Mn CI M/D outline

A

Triangular

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78
Q

Mn CI B/L outline

A

Trapezoidal

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79
Q

Mn CI mesial contact pt

A

Incisal

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80
Q

Mn CI distal contact pt

A

Incisal

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81
Q

Mn LI distal contact pt

A

LOW inscisal

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82
Q

Mn CI root is _____ with a mesial and distal concavity.

A

flat mesiodistally

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83
Q

Mx CI M/D outline

A

Triangular

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84
Q

Mx CI B/L outline

A

Trapezoidal

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85
Q

Mx CI occlusal outline

A

Triangular

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86
Q

Mx CI mesial margine

A

Straight, nearly parallel to the rooth

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87
Q

Mx CI distal margin

A

Rounded (more convex) and shorter

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88
Q

Mx CI mesial contact pt

A

Incisal

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89
Q

Mx CI distal contact pt

A

J(x) (I & M)

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90
Q

Mn LI F/L outline

A

Trapezoidal

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91
Q

Mn LI M/D outline

A

Triangular

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92
Q

Mn LI incisal outline

A

Oval

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93
Q

Has incisal edge that appears twisted on its apex (as it goes from mesial to distal, it curves lingually)

A

Mn LIs

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94
Q

The incisal edge follows the arch curvature in relation to the faciolingual axis

A

Mn LIs

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95
Q

Can see the distal marginal ridge (DMR) from the mesial view

A

Mn LIs

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96
Q

Wear facets of the incisal edges of the Mn LIs are caused by occlusion with…

A

Mx CI and Mx LI

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97
Q

Lingual cervical line is positioned more apically than facial cervical line

A

Mn LIs

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98
Q

Mx LI has lingual cervical line positioned more ____ than facial cervical line

A

apically

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99
Q

Most likely incisor to have 2 canals and 2 roots

A

Mn LI

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100
Q

Mn 1st PM occlusal outline

A

Diamond

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101
Q

Smallest premolar

A

Mn 1st PM (smaller than Mn 2nd PM - EXCEPT in crown height)

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102
Q

Largest premolar

A

Mx 1st PM

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103
Q

Lingual cusp is small, resembles cingulum

A

Mn 1st PM

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104
Q

From an interproximal view, the facial cusp appears centered over the long axis; the non-f(x) lingual cusp tip is in line with the lingual surface of the root

A

Mn 1st PM

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105
Q

Mn 1st PM, mesial lingual developmental groove makes mesial marginal ridge (MMR) run at a

A

45 degree angle

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106
Q

MesioLINGUAL developmental groove

A

Mn (near tongue) 1st PM

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107
Q

Only posterior tooth that has a HIGER DISTAL marginal ridge than mesial marginal ridge

A

Mn 1st PM

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108
Q

More occlusal surfaces can be seen from the mesial than from the distal (Mesial marginal ridge sits lower to the 45 degree angle)

A

Mn 1st PM

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109
Q

SNAKE EYES

A

Mn 1st PM

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110
Q

Only PM that as a buccal cusp with triangular ridge, so uniquely prominent as to frequently separate its mesial pit from its distal pit

A

Mn 1st PM

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111
Q

Has buccal cusp w/ triangular ridge

A

Mn 1st PM

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112
Q

Groove originates in an occlusal pit and extends onto a proximal surface (mesial)

A

Mn 1st PM

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113
Q

No central groove, may have central pit

A

Mn 1st PM

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114
Q

Mesiolingual developmental groove

A

Mn 1st PM - mesial view

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115
Q

Broader facially than lingually

A

Mn 1st PM

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116
Q

Frequently seen with a slight concavity on the mesial and distal surface

A

Mn 1st PM

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117
Q

Not flattened faciolingually

A

Mn 1st PM

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118
Q

A bifurcation is the most common root anomaly on

A

Mn 1st PM

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119
Q

Most common root anomaly on Mn 1st PM

A

Bifurcation

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120
Q

Usually free of marked distal curvature

A

Mn 1st PM

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121
Q

During ENDO on #21, you suspect a 2nd canal, most likely on the buccal of lingual?

A

If a 2nd pulp canal is present, it is most likely found lingual to the 1st canal.

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122
Q

Only tooth with its MMR at a grossly different angle than its DMR

A

Mn 1st PM - 45 degree angle, LOWER, due to mesiolingual developmental groove

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123
Q

Smallest premolar

A

Mn 1st PM

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124
Q

Narrowest and smallest root of all the premolars

A

Mn 1st PM

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125
Q

Most prominent transverse ridge of all the premolars without central groove

A

Mn 1st PM

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126
Q

Only tooth with a mesio-lingual groove from the occlusal to the lingual

A

Mn 1st PM

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127
Q

Tilted lingually

A

Mn 1st PM

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128
Q

Gingival papilla is shortest between the Mn 1st and 2nd PM

A

TRUE

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129
Q

Mn 2nd PM B/L outline

A

Pentagon

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130
Q

Mn 2nd PM M/D outline

A

Rhomboid

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131
Q

Mn 2nd PM occlusal outline

A

Pentagon

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132
Q

Lingual HOC in occlusal third

A

Mn 2nd PM

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133
Q

Types of Mn 2nd PM

A

2 cusp VS. 3 cusp

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134
Q

2 cusp Mn 2nd PM occlusal

A

Crescent = groove pattern forms either H or U

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135
Q

Which PM is most likely to exhibit a crescent shaped central developmental groove?

A

Mn 2nd PM

136
Q

More common type of Mn 2nd PM

A

3 cusp type

137
Q

3 cusp Mn 2nd PM # pulp horns

A

3

138
Q

3 cusp Mn 2nd PM occlusal table

A

Square, groove form a “Y” – bottom of Y makes lingual groove

139
Q

Occlusal outline VS. Occlusal table for Mn 2nd PM

A

Occlusal outline: Pentagon

Occlusal table: Square

140
Q

Largest cusp in Mn 2nd PM

A

B > ML > DL

141
Q

of lobes for 3 cusp type Mn 2nd PM

A

5

142
Q

3 cusp type Mn 2nd PM, frequently has ___ pit

A

Central

143
Q

Only PM that may exhibit 3 pits

A

Mn 2nd PM

144
Q

SAME total # of pits on the occlusal surface of Mx M1

A

3, Mn 2nd PM

145
Q

Which of the following teeth have the same # of pits as the Mx M1

A

3 cusp type, Mn 2nd PM

146
Q

If the Mn 2nd PM is congenitally missing, the roots of the primary Mn 2nd PM will not be resorbed and the primary tooth may be retained.

A

TRUE

147
Q

Only PM with no mesial root depression

A

Mn 2nd PM

148
Q

Close to mental foramen

A

Mn 2nd PM

149
Q

PM most likely to be congenitally missing

A

Mn 2nd PM

150
Q

PM most likely to have a central pit

A

Mn 2nd PM, 3 cusp type

151
Q

PM most likely to have 1 root and 1 canal

A

Mn 2nd PM

152
Q

Root is closest to the mental foramen and is longer than the 1st PM

A

Mn 2nd PM

153
Q

Mental foramen is located most closely to…

A

Mn 2nd PM

154
Q

Mx PMs have roots that are longer than incisors but shorter than canines

A

TRUE

155
Q

Mx PMs have crowns that are shorter than canines but longer than molars

A

TRUE

156
Q

Crown height decreases as you go posterior

A

TRUE

157
Q

Like all Mx posteriors, they have a trapezoidal shape when viewed interproximally

A

TRUE

158
Q

They have inciso-gingival contact points in the middle third

A

TRUE

159
Q

** Questions are more heavily weighted towards the Mx 1st PM VS. Mx 2nd PM

A

Important Test Taking Tip, if you don’t know the answer choose Mx 1st PM

160
Q

Mx 1st PM B/L outline

A

Pentagonal

161
Q

Mx 1st PM M/D outline

A

Trapezoidal

162
Q

Mx 1st PM occlusal outline

A

Hexagon w/ unequal sides; kinda looks like a kidney bean in cross-section DUE TO the mesial concavity

163
Q

Largest of all PMs

A

Mx 1st PM

164
Q

PM or molar tooth with greatest cervico-occlusal crown height

A

Mx 1st PM

165
Q

cusps on Mx 1st PM

A

2 = 1 buccal, 1lingual

166
Q

Lingual cusp is typically 1.0 mm shorter than the facial cusp

A

Mx 1st PM

167
Q

Buccal cusp is slightly to the distal

A

Mx 1st PM

168
Q

PM where mesial cusp ridge is longer than distal cusp ridge (B cusp slightly to distal)

A

Mx 1st PM (so does primary maxillary canine)

169
Q

Mx 1st PM occlusal view

A

Long central groove, few supplemental grooves

170
Q

Mesial marginal ridge developmental groove that moves onto the root surface (also a mesial concavity)

A

Mx 1st PM

171
Q

Mesial marginal ridge is taller than distal marginal ridge ( = the DMR is more cervical than the MMR)

A

Mx 1st PM

172
Q

roots for Mx 1st PM

A

2 pulp horns, 2 roots (bifurcate halfway down), 2 canals

173
Q

Canals for Mx 1st PM

A

Lingual canal is bigger than facial canal

174
Q

Largest PM

A

Mx 1st PM

175
Q

Has a concavity in its crown gingival to the mesial contact area

A

Mx 1st PM

176
Q

On facial cusp, has a longer mesial cusp slope than distal cusp slope

A

Mx 1st PM (so does primary Mx canine)

177
Q

Has mesial marginal ridge developmental groove

A

Mx 1st PM

178
Q

Lingual cusp is to the mesial

A

Mx 1st PM

179
Q

Has the shape of a kidney in cross-section

A

Mx 1st PM

180
Q

Bifurcates halfway down the root

A

Mx 1st PM

181
Q

Has the greatest demarcation between the pulp chamber and the pulp canals

A

Mx 1st PM

182
Q

Lingual cusp is the sam height as the facial cusp

A

Mx 2nd PM (unlike Mx 1st PM)

183
Q

No concavity on the crown

A

Mx 2nd PM

184
Q

Instead of a long central groove w/ few supplemental grooves, it has a short central groove w/ a lot of supplemental groves that make it look wrinkly.

A

Mx 2nd PM

185
Q

WRINKLY occlusal anatomy

A

Mx 2nd PM - Instead of a long central groove w/ few supplemental grooves, it has a short central groove w/ a lot of supplemental groves that make it look wrinkly.

186
Q

The mesial cusp slope is shorter than the distal cusp slope

A

Mx 2nd PM

187
Q

The Mx 2nd premolar has 1 root and 50% have 2 canals

A

TRUE

188
Q

Mx 2nd PM B/L outline

A

Pentagonal

189
Q

Mx 2nd PM M/D outline

A

Trapezoid

190
Q

Mx 2nd PM occlusal outline

A

Rounded hexagon

191
Q

Smaller than the Mx 1st PM

A

Mx 2nd PM

192
Q

Buccal lingual cusps are same height

A

Mx 2nd PM

193
Q

Lingual cusp is 1 mm shorter than buccal cusp

A

Mx 1st PM

194
Q

Mn Canine B/L outline

A

Pentagonal

195
Q

Mn Canine M/D outline

A

Triangular

196
Q

Mn Canine incisal outline

A

Diamond/oval

197
Q

Mn Canine viewed form the proximal, the facial outline is made up of:

A

One continuous arc & differs from the outline of a Mx canine = Mx canine has 3 planes

198
Q

of planes on Mn canine

A

3

199
Q

Mn Canine viewed from the facial, the mesial outline from the contact area to the root apex….

A

Relatively straight, mesial axial surface is almost parallel to the long axis of the tooth

200
Q

Mn canine mesial contact pt

A

Incisal

201
Q

Mn canine distal contact pt

A

Middle

202
Q

Longest crown

A

Mn canine

203
Q

2nd longest tooth

A

Mn canine (Mx canine is longest)

204
Q

2nd longest root

A

Mn canine (Mx canine is longest)

205
Q

FL measurement > MD measurement

A

Mn and Mx canine

206
Q

Canine relatively flat in the fossa area, poorly developed in the marginal ridge and cingulum area

A

Mn canine

207
Q

Cusp tip lingual to the faciolingual long axis bisector

A

Mn canine

208
Q

From an incisal view of Mn canine, which surface is more visible?

A

Facial

209
Q

ONLY tooth with root inclined mesially

A

Mn canine

210
Q

Anterior tooth most likely to have a bifurcated root

A

Mn canine (more often than Mx canine, Mx center, L root of Mx M1, DB root of Mx M2)

211
Q

Mx M1 B/L outline

A

Trapezoid

212
Q

Mx M1 M/D outline

A

Trapezoid

213
Q

Mx M1 occlusal outline

A

Rhomboid

214
Q

Mx M1 acute angles

A

DL (smallest cusp) and MB

215
Q

Mx M1 obtuse angles

A

DB and ML (largest cusp)

216
Q

4 f(x) cusps + cusp of Carabelli

A

Mx M1

217
Q

3 pits - mesial, central, distal

A

Mx M1 (Mn 2nd PM, Y type also has 3 pits)

218
Q

of cusps for Mx M1

A

4 f(x) + cusp of Carabelli; but, 5 lobes

219
Q

of pits for Mx M1

A

3 pits - mesial, central, distal

220
Q

of grooves for Mx M1

A

4 grooves

221
Q

Lingual groove Mx M1

A

Extends onto occlusal and becomes the distal oblique groove; ends in distal pit; in middle of tooth on Mx 2nd & 3rd, it is more positioned distally)

222
Q

Central groove Mx M1

A

Runs from mesial pit to central pit

223
Q

Mx M1 mesial border of the oblique ridge

A

Mesial pit

224
Q

Cusp of Carabelli

A

Mx M1, lingual side of mouth; lingual to ML cusp

225
Q

of lobes Mx M1

A

5 lobes

226
Q

Teeth that form from 5 lobes

A

Mx M1
Mn M1
Mn 2nd PM, 3 cusp type “Y”

227
Q

Only tooth with 2 triangular ridges on one cusp

A

Mx M1

228
Q

Mx M1 - ridge head down the cusp to the central groove, where it meets the triangular ridge from the mesio-buccal cusp to form the…

A

Transverse Ridge

229
Q

Mx M1 - triangular ridge heads down the mesiolingual cusp to meet the triangular ridge of the distobuccal cusp and forms the…

A

Oblique Ridge (oDBML)

DBML

230
Q

The transverse groove of the oblique ridge connects..

A

the distal fossa and central fossa

231
Q

Occlusal surface usually distinctly divided by a ridge from the ML to the DB cusp

A

Oblique Ridge

232
Q

Forms the distal boundary of the central fossa in Mx M1

A

Oblique Ridge*

233
Q

Passes through the DF sulcus (or angular sulcus) of the permanent Mn M1

A

Oblique Ridge

234
Q

Opposes the developmental groove between the DF and distal cusps of Mn M1

A

Oblique Ridge

235
Q

Same height as marginal ridges in Mx M1

A

Oblique Ridge

236
Q

4 f(x) cusps, but only 3 form cusp triangle

A

MB, ML, DB

DL cusp gets progressively smaller on Mx M2 and M3

237
Q

Found on all Mx molars

A

Cusp triangle (MB, ML, DB)

238
Q

Mx M1 cusp size

A

ML > MB > DL (but gets smaller more posteriorly) > DB

239
Q

Largest and longest cusp of any Mx molar tooth

A

ML cusp (also, cusp of Carabelli adds to size)

240
Q

Mx M - ML cusp tip located ___ to the MB cusp tip

A

Distal

241
Q

Mx M - DB cusp tip located ___ to the MB cusp tip

A

Lingual

242
Q

Mx M - Transverse ridge is up and down like a T

A

Made of ML and MB

243
Q

of roots in Mx M1

A

3 roots

244
Q

Mx M1 root length

A

P (longest) > MB (widest faciolingually, MB2 canal) > DB

245
Q

Only root in the mouth with both facial and lingual concavity

A

Mx M1 Palatal Root

246
Q

Longest Mx M1 root

A

Palatal

247
Q

Widest faciolingual root of Mx M1

A

MB root

248
Q

Mx M1, when viewed form the buccal, in line with buccal groove

A

Palatal root

249
Q

Mx M1, when viewed form the lingual, in line with the midpoint of MD diameter

A

Palatal root

250
Q

of pulp horns for Mx M1

A

4 pulp horns

251
Q

Mx M1 distance of furcations from cervical line

A

M (shortest)

252
Q

Only tooth that is wider lingually than facially

A

Mx M1

253
Q

The widest tooth faciolingually

A

Mx M1

254
Q

The only tooth with 2 triangular ridges on 1 cusp (the mesio-lingual cusps)

A

Mx M1

255
Q

Has a concavity on the distal surface of its crown

A

Mx M1

*hard to adapt matrix band

256
Q

Roots are closest to the maxillary sinue

A

Mx M1

257
Q

Mn M1 B/L outline

A

Trapezoid

258
Q

Mn M1 M/D outline

A

Rhomboid

259
Q

Mn M1 occlusal outline

A

Pentagon

260
Q

cusps Mn M1

A

5 cusps (3 buccal, 2 lingual)

261
Q

pulp horns Mn M1

A

5 pulp horns

262
Q

Mn M1 largest cusp

A

MB

263
Q

Mn M1 2nd largest cusp

A

ML

264
Q

Is the largest proximal crown surface of a Mn M1 mesial or distal?

A

Mesial of Mn M1

265
Q

Mn M1 smallest cusp

A

D (distal cusp projects into the distal fossa of Mx M1)

266
Q

Distal cusp of Mn M1 projects into the..

A

distal fossa of Mx M1

267
Q

Mn M1 lingual cusps are __ and more __ than buccal cusps

A

higher; pointed

268
Q

All 5 cusps viewable from the facial

A

Mn M1

269
Q

of triangular ridges Mn M1

A

5

270
Q

of grooves on Mn M1

A

4 grooves (1 central, 2 buccal [B and DB], 1 lingual)

271
Q

Buccal groove of Mn M1 separates..

A

MB and DB cusps

272
Q

Mn M1 DF groove separates DF and distal cusps

A

** Don’t mix distal with distofacial

THERE IS NO DISTAL GROOVE, only A DISTOFACIAL/DISTOBUCCAL GROOVE

273
Q

Which developmental groove is between the distofacial cusp and the distal cusp of Mn M1?

A

Distofacial groove

274
Q

of developmental grooves distinguishing Mn M1 from Mn M2?

A 
4 = Mn M1
3 = Mn M2
275
Q

Of all the molars, the mesial fossaa of the Mn M1 is most distinctly separated by the remainder of the occlusal table by a…

A

Transverse ridge

Don’t be tricked by Oblique Ridge (only on Mx M)

276
Q

MD dimension (slightly) ___ BL dimension in Mn M1

A

Greater than; the Mn M1 is 1mm wider mesiodistally than faciolingually

5 cusps with 3 cusps on the buccal

277
Q

Has longest MD measurement of all permanent molars

A

Mn M1

278
Q

f(x)ing cusps on Mn M1

A

5 cusps

279
Q

of pulp horns on Mn M1

A

5 pulp horns

280
Q

of roots on Mn M1

A

2 roots

281
Q

canals Mn M1

A

3 canals (2 in MB*)

282
Q

Roots incline ____ in Mn M1

A

distally

283
Q

Pulp CHAMBER (not canal) is ___ MD than FL in Mn M1

A

wider

284
Q

Mesial root of Mn M1 is typically very thin MD, much wider FL, and concave on both M & D surfaces

A

TRUE

285
Q

Mn M1 mesial root has a strong distal curvature in the apical 1/3rd

A

TRUE

286
Q

Mn M1’s biggest and straightest canal

A

Distal root

287
Q

of canals in Mn M1 mesial root

A

2, very small

288
Q

Primary teeth have thinner (1 mm VS. 2.5 mm) whiter, less calcified enamel that is more uniform in depth than the enamel of permanent teeth

A

TRUE

289
Q

Primary teeth are smoother with less pits and grooves

A

TRUE

290
Q

In primary teeth, enamel stops abruptly at

A

CEJ

291
Q

Primary teeth buccal and lingual surfaces are flatter above the HOC

A

TRUE

292
Q

Deciduous/primary teeth have enamel rods which go from the

A

DEJ occlusally (permanent teeth have rods directed gingivally)

293
Q

Primary teeth have bigger cervical bulges (especially the M1s)

A

TRUE - more bulbous, CEJ more obvious (dips gingivally)

294
Q

Primary teeth have ____ root trunks

A

Shorter; may be absent

295
Q

Primary teeth have roots which are more flared/divergent and skinny

A

TRUE - gotta make room for developing succadenaous teeth

296
Q

Primary dentition: fewer molars and NO premolars

A

2 VS. 3 molars

297
Q

Primary teeth have proportionately _____ pulp cavities than permanent teeth

A

Larger; think that they don’t have much time to develop secondary and tertiary dentin

298
Q

Primary teeth have ___ DEJ

A

thinner; thus, easier to have pulp exposure

299
Q

Primary teeth have more prominent pulp horns that extend closer to cusp tip

A

True - long and pointed

300
Q

Primate spaces: Maxillary

A

Btwn lateral & canine

301
Q

Primate spaces: Mandibular

A

Btwn canine & 1st molar

302
Q

Only incisory in both dentitions with MD diameter > height

A

Primary Mx Centrals

303
Q

Wider MD & shorter incisocervically than permanent teeth

A

Primary Mx Centrals

304
Q

Which tooth has prominent labial and lingual cervical ridges?

A

Primary Mx Centrals

AFJLT?

305
Q

Mesial cusp ridge longer than distal cusp ridge

A

Primary Mx Canine (opposite of perm Mx canines)

306
Q

Which other permanent tooth also has a mesial cusp ridge longer than distal cusp ridge (primary mx canine)?

A

Mx 1st PM

307
Q

Longer and sharper cusp than the permanent

A

Primary Mx Canine – makes sense because it hasn’t been worn down at all

308
Q

Crown somewhat resembles a permanent PM, but the root form is typical of a permanent molar (3 roots)

A

Primary Mx M1 (distal half very small, if you knock it off, it looks like a PM)

309
Q

Does not a have a straight cervical line

A

Primary Mx M1

310
Q

CEJ dips more on the mesial half than the distal half

A

Primary Mx M1

311
Q

roots for Primary Mx M1

A

3 roots

312
Q

Primary Mx M1 Occlusal pit-groove area

A

H-shaped

313
Q

Looks like Mx M1

A

Primary Mx M2 (it also has a Cusp of Carabelli, oblique ridge, transverse ridge, DL groove)

314
Q

Last primary tooth to erupt

A

Primary Mx M2

315
Q

Permanent Mx M1

A

Deciduous Mx M2

316
Q

Has greatest FL dimension of all primary teeth

A

Primary Mx M2

317
Q

Unlike any other tooth

A

Primary Mn M1

318
Q

Has prominent transverse ridge distinctly separating the mesial portion from the remainder of the occlusal table

A

Primary Mn M1

319
Q

Most difficult tooth to restore; Class II very difficult because of prominent MMR

A

Primary Mn M1

320
Q

of cusps in primary Mn M1

A

4 cusps = 4 pulp horns (dont’ think that it has just because Mn M1 has 5); also, ML cusp is highest and sharpest

321
Q

of cusps in Mn M1

A

5 pulp horns

322
Q

Prominent MB bulge + cervical ridge

A

Primary Mn M1

323
Q

S-shaped cervical ridge

A

Primary Mn M1

324
Q

Which primary tooth has the CEJ apically positioned on the mesial 1/3 of the crown?

A

Primary Mn M1

325
Q

Which side of the primary Mn M1 is apically positioned?

A

Mesial side

326
Q

Closely resembles permanent Mn M1 occlusally, EXCEPT MB, DB and distal cusps are nearly equal in size

A

Primary Mn M2

327
Q

What is the easiest way to distinguish between Primary Mn M2 and Mn M1 (these get smaller)?

A

Compare size of distal cusps; distal cusp is relatively much bigger in the primary

328
Q

of cusps in primary Mn M2

A

5 cusps

329
Q

Of the primary molars, which tooth bears the greatest resemblance to a PM?

A

Primary Mx M1

330
Q

Which primary tooth has a facial cervical ridge which is so distinctly prominent that it is uniquely different from ALL other teeth?

A

Primary Mn M1

331
Q

Which tooth has an H-shaped occlusal pattern?

A

Primary Mx M1

332
Q

Which tooth typically has a transverse ridge, oblique ridge, and a DL groove

A

Primary Mx M2

333
Q

Which tooth would be most difficult to do an MO?

A

Primary Mn M1

334
Q

Which primary mandibular molar has 5 cusps?

A

Primary Mn M2

335
Q

Which tooth has prominent labial and lingual cervical ridges?

A

Primary Mx Centrals

NBDE Pt. I (6 decks)

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