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Flashcards in From the App Deck (69):
1

Type I root structure of Max first premolar

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

2

Type II root structure of Max first premolar

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

3

Type III root structure of Max first premolar

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

4

Which max first premolar root type is most common

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

5

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

Mesial surface of the max first premolar

6

Secondary Dentin

formed after root formation and throughout life

7

Primary dentin

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

8

Tertiary dentin

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

9

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

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

10

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

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

11

How many teeth exhibit 2 transverse ridges

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

12

Mottled Enamel

Dental fluorosis - too much fluoride

13

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

Maxillary lateral incisors

14

The free gingiva extends from

the attached gingiva to the gingival crest

15

Attached gingiva extends from

mucogingival junction to the free gingival groove

16

Cervical lines on adjacent proximal surfaces of adjacent teeth

have approximately the same depth of curvature

17

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

It can be heart shaped, but it varies too much
Almost always wider buccolingually than mesiodistally

18

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

Anterior - Triangular
Max post - trapezoidal
Mand post - rhomboidal

19

Amelogenesis and dentinogenesis imperfecta - genetic?

yes

20

Flexion

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

21

Muscle responsible for protrusive movements of mandible

Lateral pterygoids

22

Only tooth with a pulp wider mesiodistally than faciolingually

Maxillary Central incisor

23

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

Max Central Incisor

24

Enamel Tuft

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

25

Enamel spindles

represent trapped odontoblastic processes
not related to caries susceptibility
hypomineralization

26

Enamel lamellae

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

27

Which cusp is biggest/smallest on max first molar

Biggest - ML cusp is largest
Smallest - DL

28

Tubercle on teeth

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

Curvature of canine root

apical end deflected to the distal

30

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

Maxillary canine

31

Where is the PDL the thinnest

middle 1/3 of the root

PDL will atrophy and change fiber orientation with decreased us

32

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

Primary dentin - laid down until tooth development is complete

Intertubular dentin - dentin that fills the space between dentinal tubules

33

Interglobular dentin

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

34

Flatness of primary teeth

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

Hutchinson's incisors

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

How many triangular ridges are on Max First Molar

5 - ML cusp has 2

37

2 basic types of Mandibular 3rd molars

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

Concrescence

union of cementum only

39

Segmented root due to

break in Herwig's sheath

40

Imbrication lines

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

41

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

about 75% of Europeans

42

Which teeth are mamelons found on

only incisors, 3 mamelons

43

Alveolar process

the entire bony entity which surrounds and supports all the teeth

44

True or false, cementum is avascular

True

45

Bennett shift and Bennett angle

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

Cross striations

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

Hunter-Schreger bands

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

When moving posteriorly in the mouth, proximal contacts become more

Cervically and buccally located

all anterior tooth contacts are centered faciolingually when viewed from incisal

49

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

the incisal 1/3

50

Bundle Bone

RadiOPAQUE
part of the alveolar bone adjacent to to PDL

51

Terminal Postition

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

52

Tetracylcine staining

Disoloration of the DENTIN

53

Largest incisal embrasure

between maxillary lateral and canine

54

Largest oclusal embrasure

between max canine and first premolar

55

Largest Overall incisal/occlusal embrasure

between the maxillary lateral incisor and the canine

56

Lamina stage

Initiation

57

Bud stage

Proliferation

58

Cap stage

Proliferation - enamel organ covers dental papilla

59

Early bell stage

Histodifferentiation

60

Advanced Bell stage

Morphodifferentiation

61

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

True

62

2nd and 3rd tallest crowns

Max central incisor
Max canine

63

Most common type of Mand 2nd molar

Y type
H type is least common

64

Exception to all lingual embrasures being larger than facial

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

65

Peg lateral

False microdontia in the the max lateral incisor

66

Where does fusion typically occur

anterior teeth

67

Where is Ludwig's Angina

Sublingual, Submandibular, ... space

68

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

The buccal surface only

69

True macrodontia vs false macrodontia

True is when all teeth are enlarged
False is when only one or a few are enlarged