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NBDE Part 1: Dental Anatomy > DA Fun Facts (randomized) > Flashcards

DA Fun Facts (randomized) Flashcards

1
Q

The groove pattern for the mandibular second molar is consider a ____

A

Cross (+) pattern

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1
Q

Continued eruption of a tooth through the surrounding tissue makes the clinical crown appear ____

A

longer

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1
Q

The number of lobes that form the anterior teeth is ____

A

4

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1
Q

Accessory pulp canals may contain ____ tissue

A

nervous and vascular

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1
Q

Accessory pulp canals may be found in ____ of molars

A

furcation areas

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1
Q

The main component of enamel is ____

A

inorganic matter (NOT collagen)

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1
Q

____ has measurement that is nearly identical for Inciso-Cervical versus Mesio-distal

A

Maxillary central incisor

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1
Q

____ has GREATEST cervical line curvature (on mesial) of any other tooth

A

Maxillary central incisor

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2
Q

True or False: Maintenance of the epithelial attachment is a function of the periodontal ligament

A

False - It is NOT a function of the PDL

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2
Q

The direction of enamel rods in permanent teeth in the cervical third is in a ____ direction

A

gingival

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3
Q

The crown of the mandibular second molar inclines to the ____

A

mesial and lingual

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4
Q

The occlusal outline of a mandibular first molar is a ____

A

pentagon

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4
Q

The ____ has the most pronounced developmental marginal groove of any max tooth

A

maxillary 1st premolar (mesial marginal developmental groove)

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4
Q

Facial view of maxillary molars the apex of the lingual root is in line with the ____ of the tooth

A

facial groove

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4
Q

The ____ from a proximal view tends to be positioned with the most nearly vertical axis

A

maxillary canine

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4
Q

____ has the LARGEST FL crown dimension of ANY other MANDIBULAR tooth

A

Mandibular 1st molar

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5
Q

____ plays the greatest role in discluding the posterior teeth in latero-protrusive movement

A

Anterior guidance

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6
Q

The smallest root of the maxillary molar is the ____

A

distofacial

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6
Q

Primary molars differ from permanent molars in that their roots are ____

A

more divergent

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6
Q

____ separates cusp ridges from marginal ridges

A

developmental grooves

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6
Q

The molar that has the most distinct transverse ridge separating the mesial fossa is the ____

A

Mandibular 1st molar

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7
Q

____ has fossae that are closest in size compared to any other posterior tooth

A

Maxillary 2nd premolar

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8
Q

____ are the only mandibular teeth that are wider mesio-distally than facio-lingually

A

Mandibular Molars

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8
Q

The principle muscles that retrude the mandible are the ____

A

posterior fibers of the temporalis

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8
Q

Accessory pulp canals allow the pulp tissue to ____

A

communicate with the PDL space

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9
Q

The primary ____ does NOT look like any permanent tooth

A

Mandibular 1st molar

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10
Q

____ cusp tip located facial to lingual axis

A

Maxillary canine

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11
Q

The height of contour is in the ____ for the facial surfaces of all teeth

A

gingival 1/3

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11
Q

____ covers the articulating osseous structures of the TMJ

A

Dense, avascular, fibrous connective tissue

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12
Q

The primary and permanent ____ is the most bilaterally symmetrical tooth

A

mandibular central incisor

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13
Q

The crown form of canines from a facial view is ____

A

pentagonal

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13
Q

____ has GREATEST F-L crown dimension of any ANTERIOR tooth

A

Maxillary canine

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14
Q

Calcification of the primary roots is normally completed at ____

A

3-4 years of age

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15
Q

____ is the predominant connective tissue for periodontal ligament fibers

A

Collagen

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16
Q

____ has mesio-distal measurement that is nearly identical to facio-lingual. Closest of all

A

Maxillary lateral incisor

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17
Q

All ____ teeth (12) generally have cingulums

A

anterior

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17
Q

teeth # ____ and ____ are the non molar teeth having the sharpest demarcation between pulp chamber & canal

A

5 and #12 (Maxillary 1st premolars)

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17
Q

The ____ occurs at the junction of the dental papilla & the inner enamel

A

DEJ

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17
Q

____ has longest root of any other tooth

A

Maxillary canine

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18
Q

The primary ____ has the smallest faciolingual crown dimension

A

primary mandibular central incisor

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20
Q

____ has the LONGEST ROOT length of any MANDIBULAR tooth

A

Mandibular canine

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21
Q

The premolar that has a longer mesio-facial cusp ridge than disto-facial cusp ridge is the ____

A

maxillary 1st premolar

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22
Q

____ most symmetrical crown

A

Mandibular central incisor

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23
Q

The tooth that is most likely forced into the maxillary sinus during an extraction is the ____

A

maxillary 1st molar

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24
Q

The mesiolingual developmental groove on tooth # 21 originates from the ____

A

occlusal pit

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24
Q

The physiologic rest position is established when the ____

A

muscles of mastication are in tonic equilibrium

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25
Q

The disk of the TMJ is moved forward principally by the ____

A

lateral pterygoid

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26
Q

____ from an occlusal view are frequently heart shaped because the are missing the DL cusp

A

Maxillary 3rd Molars

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26
Q

The lower compartment of the tmj is located between the ____ and the ____

A

condyle, disc

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27
Q

In a healthy mouth the alveolar process is thinnest around the ____

A

facial of the mandibular central incisors

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28
Q

The apex of a tooth is fully formed ____ after it erupts in the mouth

A

2-3 years

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28
Q

In delayed resorption of primary incisors the permanent incisors usually erupt ____

A

lingually

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29
Q

A crown of the maxillary first molar has a ____ distolingual groove than the second molar

A

shorter

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30
Q

The percentage of dentin that is organic is ____

A

20-30%

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31
Q

The ____ of an anterior tooth is the first to calcify

A

incisal ridge

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32
Q

____ ONLY premolar with a lingual groove

A

Mandibular 2nd premolar (Y type)

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34
Q

The ____ and ____ have a mesial concavity that makes it difficult to adapt a matrix band

A

maxillary 1st premolar and mandibular 1st molar

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36
Q

The mesiofacial and distolingual angles from the occlusal outline tend to be ____ angles

A

acute

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37
Q

Other than 3rd molars the tooth that is most often congenitally missing is the ____

A

maxillary lateral incisor

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38
Q

The facial masticatory mucosa (attached gingival) is narrowest for the mandibular first premolar

A

mandibular 1st premolar

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39
Q

____ has the LONGEST root of any other molar

A

Mandibular 1st molar

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40
Q

Periodontal ligament fibers support the tooth connecting to the dental alveolar bone via the ____

A

cementum

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42
Q

2 key features that differentiate a mandibular 1st & 2nd molar are the number of ____ and number of ____

A

developmental grooves, cusps

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43
Q

In Posselt’s envelope of motion ____ is the most superior point

A

Maximum intercuspal position

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43
Q

Marginal ridge heights for posterior teeth are generally more occlusal on the ____ than on the ____

A

mesial, distal

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44
Q

The groove pattern for the mandibular first molar is considered a ____

A

Y (dryopethicus) pattern

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44
Q

True or False: The epithelial attachment is always an actual part of a tooth’s periodontium

A

TRUE

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44
Q

Tooth contact almost exclusively determines ____

A

intercuspal position

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45
Q

There are a total of ____ teeth in the permanent dentition that normally have cingulums

A

12

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46
Q

The TMJ has ____

A

2 synovial cavities

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47
Q

True or False: The mandibular central incisors have contact points at the same incisocervical level

A

TRUE

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47
Q

The usual overjet is ____

A

2-4 mm

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48
Q

The bifurcation for the mandibular canine roots when present creates a ____ and ____ root

A

facial, lingual

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49
Q

The oblique ridge of maxillary molar forms the ____ boundary of the central fossa

A

distal

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49
Q

The mesial surface of the crown of the ____ is almost parallel to the long axis

A

mandibular canine

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49
Q

The primate space develops in the maxillary primary dentition between the ____ and ____

A

lateral incisor, canine

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50
Q

The mesio-distal width of the mandibular lateral incisor is ____ than the mandibular central incisor

A

wider

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51
Q

More of the occlusal surface can be seen from the mesial than distal for a ____

A

Mandibular 1st premolar

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51
Q

When the mandible moves from centric occlusion to edge to edge the condyles move ____

A

forward and downward

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52
Q

From the facial or lingual view canines have a ____ outline

A

pentagonal

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53
Q

The primary second molar exhibits ____ cusps than the primary first molar

A

more

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54
Q

The non-molar tooth that most frequently exhibits three roots is the ____

A

maxillary 1st premolar

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55
Q

____ have proximal contacts at approximately the same levels on mesial & distal

A

mandibular central incisors

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55
Q

____ GREATEST OVERALL total tooth length

A

Maxillary canine (tied with mandibular canine according to Dr. Arcoria)

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56
Q

____ occurs when the mastication muscles are in tonic equilibrium

A

Physiologic rest position

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57
Q

The smallest cusp of the mandibular 1st molar is the ____

A

distal cusp

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58
Q

____ has cusp heights closer in height to each other than any other PREMOLAR

A

Maxillary 2nd premolar

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59
Q

The upper compartment of the tmj is that space between the ____ and the ____ and ____

A

disc, articular fossa, eminence

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60
Q

The primary ____ resembles a premolar

A

Maxillary 1st molar

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61
Q

Occlusal view the greatest faciolingual diameter of a mandibular 2nd molar is in the ____

A

mesial 1/3

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62
Q

The cervical ridge is most prominent for primary maxillary teeth on the ____

A

MF surface of the 1st molar

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64
Q

The cross section of the mandibular canine at the CEJ is ____ but wider mediodistally at the ____

A

ovoid, facial (labial)

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65
Q

The ____ molar is the molar that most frequently has only 3 cusps

A

Maxillary 3rd

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66
Q

The lingual cusp of the mandibular 1st premolar in normal occlusion contacts what?

A

does not occlude with anything

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68
Q

The primary ____ has a crown that somewhat resembles a permanent premolar

A

maxillary 1st molar

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69
Q

The tooth with the longest root is the ____

A

Maxillary canine

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69
Q

The premolar with the steepest cusp inclines is the ____

A

maxillary 1st premolar

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70
Q

The cusp tip of the primary canine is generally off set to the ____

A

distal

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71
Q

The Y type mandibular premolar has ____ facial and ____ lingual cusps

A

1, 2

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73
Q

____ periodontal ligament fibers are most likely to be found in the middle 1/3 of the root

A

Oblique

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74
Q

Supernumerary teeth when seen in the maxilla are usually found between the ____ or as ____

A

central incisors, 4th molars

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74
Q

____ ONLY premolar with a central fossa

A

Mandibular 2nd premolar (Y type)

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75
Q

The distobuccal cusp of the mandibular molars occludes in the ____ of the maxillary molars

A

central fossa

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76
Q

The contact between a max central and lateral incisor makes the lingual embrasure ____ than the facial

A

larger

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78
Q

The Y type mandibular 2nd premolar has ____ of occlusal pits as the mandibular 1st molar

A

the same number

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79
Q

____ mesio-distal crown width SMALLEST of any MAXILLARY tooth

A

Maxillary lateral incisor

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81
Q

The primary tooth that has the most distinctly prominent facial cervical ridge is ____

A

Mandibular 1st molar

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81
Q

From a facial view the crown of a primary canine has a mesio-incisal slope ____ than the distoincisal

A

longer

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83
Q

____ are the only anterior teeth that are wider mesio-distally than facio-lingually

A

Maxillary incisors

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84
Q

The mesio-distal width of the maxillary lateral incisor is ____ than the maxillary central incisor

A

narrower

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84
Q

The primary ____ most often bears the greatest resemblance to a premolar

A

Maxillary 1st molar

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85
Q

Physiological rest position is also known as ____

A

Postural position

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86
Q

Perikymata are a result of ____

A

normal enamel apposition

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87
Q

The ____ has its mesial marginal ridge more cervical than the distal

A

Mandibular 1st premolar

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88
Q

The size and position of the cusps are more identical for the ____ maxillary premolar than the ____ maxillary premolar

A

2nd, 1st

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88
Q

All premolars are wider ____ than ____

A

faciolingually, mesiodistally

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89
Q

____ LARGEST Occluso-cervical crown dimension of any MANDIBULAR molar

A

Mandibular 1st molar

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91
Q

The ____ angle of the maxillary lateral has the greatest convexity of all maxillary anterior teeth

A

distoincisal

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93
Q

____ crown twisted on root

A

Mandibular lateral incisor

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93
Q

____ has mesial marginal ridge that is more cervical than distal marginal ridge

A

Mandibular 1st premolar

94
Q

____ has sharpest set of incisal angles (mesial and distal)

A

Mandibular central incisor

95
Q

____ has incisal edge lingual to long axis

A

Mandibular canine

96
Q

The side shift of the mandible is also known as the ____

A

Bennet movement

98
Q

All teeth have ____ (positive anatomy feature)

A

distal and mesial marginal ridges

99
Q

The anterior tooth that most likely would demonstrate a lingual pit cavity is ____

A

maxillary lateral incisor

99
Q

The direction of primary enamel rods in the cervical third is in an ____ direction

A

occlusal

100
Q

Mandibular molars have long axis of their root apices ____ and their crowns ____

A

facial, lingual

100
Q

____ is a ligament guided position

A

Centric relation

101
Q

Mandibular 1st molar has three ____ cusps

A

facial

103
Q

____ MESIAL root has GRATEST F-L dimension of any other root

A

Mandibular 1st molar

104
Q

The pulp chamber of a mature tooth contains ____

A

blood vessels, nerves and lymph vessels

106
Q

The mandibular canine has a ____ cingulum than the maxillary canine

A

less prominent

106
Q

____ only tooth with mesial marginal ridge groove and mesial corwn concavity and mesial root depression

A

Maxillary 1st premolar

107
Q

Except for third molars the ____ exhibits the most deviation in crown morphology

A

maxillary lateral incisors

107
Q

Bennett movement occurs during the ____

A

earliest stage of lateral movement

109
Q

The ____ provide some degree of protection for lips, cheeks and tongue

A

overjet and overbite

110
Q

____ SMALLEST crown dimensions of ANY tooth

A

Mandibular central incisor

112
Q

Periodontal ligament fibers are made up of ____

A

collagen

113
Q

The occlusal outline for the mandibular 1st premolar occlusal view is ____

A

diamond shaped

114
Q

The center of the ____ on a Maxillary 1st molar is at the same level with the marginal ridge

A

oblique

116
Q

The primary ____ is the primary tooth that generally has an oblique ridge

A

maxilary 2nd molar

117
Q

The ____ is the only premolar that frequently only has one pulp horn

A

Mandibular 1st premolar

118
Q

Viewed from the occlusal the 4 ____ are aligned in a straight line

A

mandibular posterior teeth

120
Q

____ is another term for intercuspal position

A

Centric occlusion

121
Q

____ is a muscle guide position

A

Pysiological rest position

121
Q

____ ONLY premolar with multiple lingual cusps

A

Mandibular 2nd premolar (Y type)

122
Q

The primary teeth that differ most from permanent teeth are the ____

A

first molars (particulary mandibular)

123
Q

The mandibular 1st PREmolar, the mesial marginal ridge located more ____ than the distal

A

cervical

124
Q

The lingual cusp of the ____ is approximately 2/3rds the height of the facial cusp

A

mandibular 1st premolar

125
Q

The occlusal outline from an occlusal view for the maxillary first molar is ____

A

rhomboidal

127
Q

The mesiolingual cusp of the ____ is the largest and longest posterior cusp

A

Maxillary 1st molar

128
Q

The ____ are the only teeth that have potential of contacting both anterior and posterior teeth

A

Maxillary canine, mandibular 1st premolar

129
Q

The developmental groove between the df cusp and the dl cusp of the mandibular 1st molar is called the ____

A

distofacial groove

130
Q

The ____ of a Maxillary lateral incisor is an anatomical feature that complicates root planning

A

DL groove

131
Q

____ has GREATEST cervical prominence of any ANTERIOR tooth

A

Maxillary canine

132
Q

The ideal position and height of lingual cusps of MAND 1st molar accommodates a ____ movement

A

working movement

133
Q

The occlusal table of a posterior tooth makes up ____ of the total facio-lingual dimension

A

55-65%

135
Q

The ____ is the posterior tooth that has the greatest cervico-occlusal crown height

A

maxillary 1st premolar

136
Q

____ has GREATEST root separation of ANY OTHER tooth

A

Mandibular 1st molar

137
Q

The ____ of maxillary molar is the only one that is not part of the molar cusp triangle

A

distolingual cusp

138
Q

____ is the most symmetrical POSTERIOR tooth

A

Maxillary 2nd premolar

140
Q

The lingual cusp of a ____ is similar in development to the cingulum of a canine

A

Mandibular 1st premolar

141
Q

The mandibular primary primate space is located between ____

A

canine and 1st molar

143
Q

The non-working condyle moves ____

A

downward, forward and medial

143
Q

Primary teeth are ____ than permanent teeth are consequently are more worn

A

less mineralized

145
Q

____ only tooth with a mesio-lingual groove

A

Mandibular 1st premolar

146
Q

The largest root of the maxillary molar is the ____

A

palatal

146
Q

The ____ has the greatest facio-lingual axial inclination

A

Maxillary central incisor

147
Q

The first succedanous tooth to erupt in the mouth is the ____

A

permanent mandibular central incisor

148
Q

Mesiolingual groove is an identifying characteristic for the ____

A

Mandibular 1st premolar

150
Q

____ has a cruxiform occlusal pattern

A

Mandibular 2nd molar

152
Q

Facial view of a primary mandibular 1st molar the CEJ is most apically positioned toward the ____

A

mesial 1/3

153
Q

____ has distal contact centered both Inciso-cervically and facio-lingually

A

Maxillary lateral incisor

155
Q

____ has a distal bulge

A

Maxillary canine

156
Q

Accessory pulp canals may be found in the ____ of the root

A

cervical 1/3

157
Q

The function of the pulp is to ____

A

form and supply nutrients and transmit sensory stimuli

158
Q

The usually pattern of eruption for primary teeth is:

A

centrals, laterals, 1st molars, canines, 2nd molars

160
Q

____ is the only primary posterior tooth to have oblique & transverse ridges &DL groove

A

Primary maxillary 2nd molar

161
Q

The lingual cusp of the maxillary premolars is off set to the ____

A

Mesial. The 1st more than the 2nd

162
Q

The primary ____ exhibits a prominent cervical ridge both on the facial and lingual surfaces

A

maxillary central incisor (tooth F)

164
Q

____ only premolar with longer mesial cusp ridge

A

Maxillary 1st premolar

166
Q

In cross section the root of the mandibular canine is ____

A

irregularly oval

168
Q

The primary mandibular 1st molar usually exhibits a ____ (negative anatomy on occlusal table)

A

mesial and distal triangular fossa

169
Q

The ____ is the anterior-posterior curvature of the occlusal surfaces as seen in a facial view

A

Curve of Spee

170
Q

The difference in space from the primary to the permanent dentition is ____

A

2-4 mm

172
Q

The geometric form of anterior teeth when viewed from the proximal is ____

A

triangular

173
Q

The____ ligament limits the extent of jaw opening

A

Temperomandibular ligament

175
Q

Mandibular ____ and Maxillary ____ generally occlude with only one opposing tooth

A

Central incisors, third molars

176
Q

Of the 3 furcations of a maxillary 1st molar the ____ is the furthest from the cervical line

A

distal

177
Q

The ____ tends to taper toward the facial rather than toward the lingual

A

Maxillary 1st molar

178
Q

Mamelons that remain beyond the age of 10 generally indicate an ____

A

open bite

179
Q

The ____ periodontal fibers travel from one root to an adjacent root surface

A

transseptal

180
Q

The mesiolingual cusp of the Maxillary molars occludes in the ____ of the mandibular molars

A

central fossa

181
Q

The apex of the triangular-shaped boundary of the interproximal space is the ____ of the teeth

A

contact area

183
Q

In the rare event of a second canal for a mandibular 1st premolar it is most likely located to the ____

A

lingual

184
Q

The softest dental tissue is ____

A

cementum

184
Q

The ____ has a distal concavity that can pose special problems in matrix placement

A

Maxillary 1st molar

185
Q

A common trait of maxillary premolars is that their ____ cusps are off set to the mesial

A

lingual

186
Q

The ____ has the greatest faciolingual diameter of the crown for all teeth

A

Maxillary 1st molar

187
Q

The Bennett movement is the bodily shift of the mandible ____ the working condyle

A

toward

188
Q

The thickest section of the articular disc when seen in the sagittal plane is the ____

A

posterior border

189
Q

The ____ has two cusps that are of equal height

A

maxilary 2nd premolar

191
Q

The ____ is a depression in the temporal bone, just anterior to the auditory canal

A

glenoid fossa

191
Q

____ Proximal contacts at same level

A

Mandibular central incisor

192
Q

When viewed from the occlusal the arrangement of the teeth are ____

A

parabolic

193
Q

____ has greateast MD crown dimension of any ANTERIOR tooth

A

Maxillary central incisor

194
Q

The mandibular centrals and laterals most frequently have concave areas on ____ root surfaces

A

mesial and distal

195
Q

The ____ has a uniquely prominent triangular ridge

A

Mandibular 1st premolar

196
Q

The cervical line of permanent teeth has the greatest depth of curvature on the ____ aspect of a tooth.

A

mesial

197
Q

The ____ is an extrinsic muscle of the tongue that causes it to retract

A

styloglossus

198
Q

The lingual concavity of the maxillary anterior teeth is most influenced by the ____

A

side shift of the mandible

198
Q

The primate space develops in the mandibular primary dentition between the ____ and ____

A

Canine, 1st molar

199
Q

The ____ has the longest root

A

Maxillary canine

200
Q

The ____ periodontal ligament fibers reduces the likelihood of forceful impaction into the alveolus

A

Oblique

201
Q

The non-molar tooth that most frequently has a mesial and distal pulp horn is the ____

A

maxillary central incisor

202
Q

Of the 3 furcations of a maxillary 1st molar the ____ is the closest to the cervical line

A

mesial

203
Q

____ distal contact is centered

A

Maxillary canine

204
Q

____ are the only maxillary teeth that are wider mesio-distally than facio-lingually

A

Maxillary incisors

206
Q

____ is the cemental union of 2 fully formed teeth that were originally separate entities

A

Concrescence

207
Q

The ____ cusp of the maxillary 1st premolar is offset to the distal

A

facial

209
Q

The primary ____ has the most distinct transverse ridge

A

primary mandibular 1st molar

211
Q

This mesiolingual and distofacial angles from the occlusal outline tend to be ____ angles

A

obtuse

212
Q

The largest cusp of the mandibular first molar is the ____

A

Mesiofacial

213
Q

The ____ muscle isa muscle of mastication but is NOT an elevator of the mandible

A

lateral pterygoid

214
Q

The mandibular canine is ____ mesiodistally than the maxillary canine

A

narrower

215
Q

The incisal embrasure between the maxillary centrals is ____ than between the central and the lateral

A

smaller

216
Q

The ____ ligament initiates translation of the condyle down the articular eminence

A

Temperomandibular ligament

218
Q

The premolar that most frequently has a single central pit is the ____

A

Mandibular 2nd premolar

219
Q

____ facio-lingually smallest of any posterior tooth

A

Mandibular 1st premolar

221
Q

The teeth whose function is primarily biting are ____ and ____

A

incisors and canines

222
Q

The primary spacing for the anterior teeth is most frequently caused by ____

A

growth of the dental arches

223
Q

The number of lobes that form the posterior teeth coincides with the number of ____

A

cusps

224
Q

Mandibular centrals distinguished by the cervical curvature, which is greater on the ____ than the ____

A

mesial, distal

225
Q

____ are the only posterior teeth that are wider mesio-distally than facio-lingually

A

Mandibular Molars

226
Q

Mandibular 1st molars usually have two canals in the ____ root

A

mesial

227
Q

Caries stimulates the production of ____ dentin

A

tertiary

229
Q

For multirooted teeth dentin continues to form MOST rapidly at the ____ and ____ of the pulp chamber

A

floor and roof

230
Q

The ____ has frequently both a separate mesial and distal pit

A

Mandibular 1st premolar

231
Q

The ____ is the anterior tooth that most frequently exhibits a bifurcated root

A

mandibular canine

232
Q

The condyle on the working side generally rotates about a ____ and ____

A

vertical axis, translates laterally

234
Q

____ is an excess of calcified tissue formation at the root apex

A

Hypercementosis

235
Q

____ is closest of all MANDIBULAR TEETH in FL versus M-D diameter

A

Mandibular 1st premolar

236
Q

For molar teeth the root canals join the pulp chamber ____

A

apical to the CEJ

237
Q

The maxillary lateral incisor is usually ____ the maxillary central in root length

A

equal to or larger than

238
Q

____ has SHORTEST root of any mandibular tooth

A

Mandibular 3rd molar

239
Q

The premolar that is most likely to have a crescent-shaped central developmental groove is ____

A

Mandibular 2nd premolar

241
Q

____ has distal contact that farthest cervically of any INCISOR

A

Maxillary lateral incisor

242
Q

____ makes a C shape from crown tip to root apex when viewed proximally

A

Mandibular canine

243
Q

The cross sectional outline at the cervical is roughly triangular for the permanent ____

A

maxillary 2nd molars

244
Q

The highest and sharpest cusp on a primary mandibular first molar is the ____

A

mesiolingual

246
Q

The ____ muscles are primarily responsible for protrusive movement

A

lateral pterygoid

248
Q

At mid root cross section of first molars the largest is the ____

A

mesial of the mandibular

249
Q

When compared to a maxillary canine the mandibular canine has proximal contact areas located more ____

A

incisally

250
Q

The primary _____ generally exhibits cusp of Carabelli

A

Maxillary Second Molar

251
Q

The hardest dental tissue is ____

A

enamel

252
Q

Mandibular 1st molar usually has ____ roots and ____ canals

A

2 roots, 3 canals

253
Q

The mesiolingual developmental groove on tooth # 21 extends onto the ____

A

proximal surface

255
Q

____ is a developmental abnormality characterized by the presence of fewer teeth than usual

A

Oligodontia

257
Q

Interradicular fibers are not ____ fibers

A

gingival

258
Q

The cervical cross section of the ____ exhibits a kidney shaped root outline

A

maxillary 1st premolar

259
Q

The ____ has the greatest m-d diameter of all molars

A

Mandibular 1st molar

261
Q

The TMJ is protected by ____, ____, ____, and ____

A

sinovial fluid, fibrocartilage, ligament suspension and masticatory muscles

262
Q

A transverse ridge results from the union of the ____ and ____ triangular ridges

A

facial, lingual

263
Q

____ has straightest mesial alignment of crown to root

A

Mandibular canine

264
Q

The shortest interdental papilla is between the ____

A

mandibular 2nd premolar and 1st molar

265
Q

The cervical cross section of the ____ exhibits a kidney shaped pulp chamber floor

A

Mandibular 1st premolar

266
Q

____ has longest CROWN dimension of any other tooth

A

Mandibular canine

267
Q

A primary molar lacks an identifiable ____

A

root trunk

268
Q

The ____ lobe of the maxillary canine includes the cusp tip

A

middle facial

269
Q

The dentin that is most highly mineralized is ____

A

intratubular (peritubular) dentin

270
Q

When a 4th pulp canal is present in a maxillary first molar it is located in the ____ root

A

Mesiofacial

271
Q

Approximately ____ of permanent root formation is completed at the time the tooth erupts

A

50%

272
Q

____ has GREATEST distal root inclination of any other tooth

A

Mandibular 3rd molar

273
Q

Teeth are in contact in intercuspal position during ____

A

Non-masticatory swallowing

274
Q

The oblique ridge connects the ____ and ____ cusps

A

mesiolingual, distofacial

275
Q

____ have the greatest morphological variation. ____ have the second most morphological variation

A

3rd Molars, Maxillary lateral incisors

276
Q

Viewed from the occlusal the basic coronal outline of a mandibular second premolar is ____

A

pentagonal

277
Q

____ LARGEST M-D crown dimension of ANY other tooth

A

Mandibular 1st molar

278
Q

The obtuse corners coincide with the direction of the ____ ridge

A

oblique

280
Q

Ligaments associated with the TMJ serve to ____

A

protect surrounding and supporting tissues from damage

281
Q

The most caries prone surfaces of molars are the ____ and the ____

A

lingual of maxillary, facial of mandibular

282
Q

The facial surfaces of mandibular molars are located ____ the border of the ascending ramus

A

medial to

283
Q

The ____ most often is in abnormal relation and contact with adjacent teeth

A

maxillary lateral incisor

284
Q

The ____ of the periodontal ligament provide the major support for a tooth during function

A

oblique fibers

285
Q

The non-molar that is least likely to have a bifurcated root is the ____

A

maxillary central incisor

286
Q

____ most variation of all posterior teeth in facial versus lingual cusp height

A

Mandibular 1st premolar

287
Q

The ____ has a continuous convex facial surface from incisal to apical end

A

mandibular canine

288
Q

The ____ has a wider m-d width toward the lingual than toward the facial

A

Maxillary 1st molar

289
Q

In cervical cross section the root of the mandibular canine is flattened in a ____ direction

A

mesiodistal

290
Q

Contraction of the ____ produces forward movement of the condyle from the articular fossa

A

lateral pterygoid

291
Q

The maxillary first primary molar has a root that resembles a typical permanent ____

A

molar

292
Q

The last primary teeth to erupt are the ____

A

maxillary 2nd molars

293
Q

____ has MOST crown shape variations

A

Maxillary lateral incisor

294
Q

____ have the most distinct and deepest lingual fossa’s of all anterior teeth

A

maxillary lateral incisors

295
Q

The ____ generally have the most prominent marginal ridges of all anterior teeth

A

maxillary lateral incisors

296
Q

The roots of the maxillary second molar tend to be less ____ and have greater ____ inclinations than the first molar

A

divergent, distal

297
Q

The ____ is the prime mover in effecting a left working movement

A

right lateral pterygoid

298
Q

____ closest in size FL vs MD of any MAXILLARY POSTERIOR tooth

A

Maxillary 1st molar

NBDE Part 1: Dental Anatomy (2 decks)

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