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Boards - Dental Anatomy Facts from videos > From the App > Flashcards

From the App Flashcards

1
Q

Type I root structure of Max first premolar

A

Type I - Single Root, wider buccolingually, prominent concavity on mesial surface, kidney shaped in cross section

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2
Q

Type II root structure of Max first premolar

A

Type II - Bifurcated Root
Root divides into a buccal and lingual root branch
Most common root form of maxillary 1st premolars

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3
Q

Type III root structure of Max first premolar

A

Type III - Laminated root
Resembles type II, except buccal and lingual branches are joined in part by lamination
Lamination - a thin connection between the main portions of the root structure

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4
Q

Which max first premolar root type is most common

A

Type II - Bifurcated Root
Root divides into a buccal and lingual root branch
Most common root form of maxillary 1st premolars

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5
Q

A crown concavity that is confluent with a longitudinal groove of the root is most commonly associated with which of the following teeth

A

Mesial surface of the max first premolar

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6
Q

Secondary Dentin

A

formed after root formation and throughout life

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7
Q

Primary dentin

A

laid down during tooth formation and ends when root development is complete

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8
Q

Tertiary dentin

A

laid in response to trauma or injury (caries) and is highly irregular

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9
Q

The dimension in which the Max and Mand Canine differ the most

A

the permanent Mand Canine is much narrower faciolingually than the permanent Max Canine

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10
Q

Which primary tooth closely resembles the permanent Mandibular First Molar - what two distinct characteristics

A

Primary Mandibular 2nd Molar - 5 cusps and a DB groove

The Primary mandibular 1st molar has four cusps and only max molars demonstrate oblique ridges

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11
Q

How many teeth exhibit 2 transverse ridges

A

none, when 2 happen, the second is called an oblique ridge

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12
Q

Mottled Enamel

A

Dental fluorosis - too much fluoride

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13
Q

What permanent anterior tooth normally exhibits a round pulpal outline in both cervical and mid root horizontal cross sections

A

Maxillary lateral incisors

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14
Q

The free gingiva extends from

A

the attached gingiva to the gingival crest

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15
Q

Attached gingiva extends from

A

mucogingival junction to the free gingival groove

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16
Q

Cervical lines on adjacent proximal surfaces of adjacent teeth

A

have approximately the same depth of curvature

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17
Q

Maxillary 3rd molars are almost always heart-shaped - True of False

A

It can be heart shaped, but it varies too much

Almost always wider buccolingually than mesiodistally

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18
Q

What are the outline shapes from the proximal view of these crowns
Anterior teeth
Maxillary posterior teeth
Mandibular posterior teeth

A

Anterior - Triangular
Max post - trapezoidal
Mand post - rhomboidal

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19
Q

Amelogenesis and dentinogenesis imperfecta - genetic?

A

yes

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20
Q

Flexion

A

involves root portion only, a bend in the apical most third of the root - can be caused by trauma

Dilaceration is a distortion of the normal relationship between the crown and root, a sharp bend that begins immediately apical to CEJ - can be caused by trauma

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21
Q

Muscle responsible for protrusive movements of mandible

A

Lateral pterygoids

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22
Q

Only tooth with a pulp wider mesiodistally than faciolingually

A

Maxillary Central incisor

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23
Q

Only tooth that appears triangular when viewed in cross section at the CEJ

A

Max Central Incisor

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24
Q

Enamel Tuft

A

areas of hypomineralization that extend from the DEJ up to 1/3 the thickness of the enamel layer
Not related to caries susceptibility

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25
Q

Enamel spindles

A

represent trapped odontoblastic processes
not related to caries susceptibility
hypomineralization

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26
Q

Enamel lamellae

A

cracks that run the length of the enamel layer - from the DEJ to the tooth surface
not related to caries susceptibility
hypomineralization

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27
Q

Which cusp is biggest/smallest on max first molar

A

Biggest - ML cusp is largest

Smallest - DL

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28
Q

Tubercle on teeth

A

Most commonly on the lingual surface

on rare occasions, the lingual surface has a tubercle located near the most incisal level of the cingulum

29
Q

Curvature of canine root

A

apical end deflected to the distal

30
Q

Which tooth has the highest rate of impaction outside of 3rd molars

A

Maxillary canine

31
Q

Where is the PDL the thinnest

A

middle 1/3 of the root

PDL will atrophy and change fiber orientation with decreased us

32
Q

Which type of dentin makes up most of the dentin in tooth

A

Primary dentin - laid down until tooth development is complete

Intertubular dentin - dentin that fills the space between dentinal tubules

33
Q

Interglobular dentin

A

hypomineralized dentin formed where specks of mineral picked up by collogen fibers have calcified, but failed to fuse

34
Q

Flatness of primary teeth

A

Primary teeth have a flatter facial and lingual surface than permanent teeth above crest of contour - gives the appearance of a narrower occlusal table

35
Q

Hutchinson’s incisors

A

caused by congenital syphilis - bacteria
4-6 months in utero before calcification begins
screwdriver appearance of incisors

Mulberry molars - 1st molars affected by congenital syphilis

Primary teeth typically not affected

36
Q

How many triangular ridges are on Max First Molar

A

5 - ML cusp has 2

37
Q

2 basic types of Mandibular 3rd molars

A

Type I - resembles the 2nd molar with 4 cusps
Type II - resembles the 1st molar with 5 cusps

roots are extremely variable and 1 root and 2 roots are both common

38
Q

Concrescence

A

union of cementum only

39
Q

Segmented root due to

A

break in Herwig’s sheath

40
Q

Imbrication lines

A

faint, curved lines that roughly parallel the CEJ in the cervical third of the tooth surface on facial side

41
Q

How common is the cusp of Carabelli on primary 2nd molar

A

about 75% of Europeans

42
Q

Which teeth are mamelons found on

A

only incisors, 3 mamelons

43
Q

Alveolar process

A

the entire bony entity which surrounds and supports all the teeth

44
Q

True or false, cementum is avascular

A

True

45
Q

Bennett shift and Bennett angle

A

Bennett shift - lateral movement of the mandible towards the working side during LATERAL EXCURSIONS (not protrusive)

Bennett angle - the angle obtained after the non-working side condyle has moved anteriorly and medially, relative to the sagittal plane

46
Q

Cross striations

A

mark the incremental lengthening of enamel rods (4 microns/day). They are ring-like, regular, and run a right angles to the enamel rods

47
Q

Hunter-Schreger bands

A

alternating dark and light bands visible in the inner 4/5 of longitudinal tooth sections. they are believed to be no more than an optical phenomenon

48
Q

When moving posteriorly in the mouth, proximal contacts become more

A

Cervically and buccally located

all anterior tooth contacts are centered faciolingually when viewed from incisal

49
Q

Crest of curvature for both the mesial and distal sides of the Maxillary Central incisor is in which 1/3 of the tooth

A

the incisal 1/3

50
Q

Bundle Bone

A

RadiOPAQUE

part of the alveolar bone adjacent to to PDL

51
Q

Terminal Postition

A

Determined by how posterior the condyle can go in the glennoid fossa

52
Q

Tetracylcine staining

A

Disoloration of the DENTIN

53
Q

Largest incisal embrasure

A

between maxillary lateral and canine

54
Q

Largest oclusal embrasure

A

between max canine and first premolar

55
Q

Largest Overall incisal/occlusal embrasure

A

between the maxillary lateral incisor and the canine

56
Q

Lamina stage

A

Initiation

57
Q

Bud stage

A

Proliferation

58
Q

Cap stage

A

Proliferation - enamel organ covers dental papilla

59
Q

Early bell stage

A

Histodifferentiation

60
Q

Advanced Bell stage

A

Morphodifferentiation

61
Q

True or False - It is more common to have a 4th canal in the Max first molar

A

True

62
Q

2nd and 3rd tallest crowns

A

Max central incisor

Max canine

63
Q

Most common type of Mand 2nd molar

A

Y type

H type is least common

64
Q

Exception to all lingual embrasures being larger than facial

A

Max 1st molar and Mand central incisors have equal facial and lingual embrasure sizes

65
Q

Peg lateral

A

False microdontia in the the max lateral incisor

66
Q

Where does fusion typically occur

A

anterior teeth

67
Q

Where is Ludwig’s Angina

A

Sublingual, Submandibular, … space

68
Q

The crowns of primary molars normally exhibit a prominent cervical ridge on which surfaces

A

The buccal surface only

69
Q

True macrodontia vs false macrodontia

A

True is when all teeth are enlarged

False is when only one or a few are enlarged

Boards - Dental Anatomy Facts from videos (7 decks)

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