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

From the App Flashcards

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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
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

Boards - Dental Anatomy Facts from videos (7 decks)

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