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Tooth Morphology > Final exam > Flashcards

Final exam Flashcards

1
Q

Wider and longer crowns with straight incisal edges

A

Maxillary centrals

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2
Q

Smaller and more rounded edges with straight incisal edges

A

Maxillary laterals

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3
Q

Rounded facial surfaces with a single pointed cusp

A

Maxillary canines

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4
Q

-Most commonly extracted
-May have divided root
-Long central groove that extends over mesial marginal ridges
-Possible bifurcation
-Mesial crown concavity
-Mesial root depression

A

Maxillary 1st premolars

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5
Q

-Short central groove only 1/3 of occlusal surface
-1 root
-No bifurcation

A

Maxillary 2nd premolars

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6
Q

-3 roots
-Oblique ridge
-Cusp of carabelli
-4 cusps

A

Maxillary 1st molars

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7
Q

-3 roots
-Oblique ridge
-Can be tricusped

A

Maxillary 2nd molars

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8
Q

-Most narrow
-Symmetrical

A

Mandibular centrals

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9
Q

-Edges more rounded
-Incisal edge slopes distally
-Wider than centrals

A

Mandibular laterals

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10
Q

-One single cusp tip
-Rare bifurcated root

A

Mandibular canines

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11
Q

-Most commonly extracted
-Short lingual non-functional cusp

A

Mandibular 1st premolars

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12
Q

-Functional lingual cusp
-Often has two lingual cusps
-Can be tricusped

A

Mandibular 2nd premolars

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13
Q

-5 cusps
-2 roots
-Zig-zag central groove
-2 buccal pits & grooves
-Mesial root may have two canals

A

Mandibular 1st molars

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14
Q

-4 cusps
-2 roots
-Cross central groove
-1 buccal pit

A

Mandibular 2nd molars

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15
Q

What makes up the occlusal table?

A

Margin ridge + cusp ridges/slopes

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16
Q

When does primary tooth development begin?

A

6 weeks in utero

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17
Q

What are the stages of tooth development?

A

Initiation
Bud
Cap
Bell
Apposition
Maturation

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18
Q

When is the initiation stage?

A

6-7 weeks

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19
Q

When is the bud stage?

A

8th week

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20
Q

When is the cap stage?

A

9-10 weeks

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21
Q

When is the bell stage?

A

11-12 weeks

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22
Q

What is the primitive mouth?

A

Stomodeum

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23
Q

What is the stomodeum lined by?

A

Ectoderm

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24
Q

What does the stomodeum give rise to?

A

Oral epithelium

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25
What migrates to areas to influence ectomesenchyme tissue?
Neural crest cells
26
What is oral epithelium and ectomesenchyme separated by?
Basement membrane
27
Extensive growth of the dental lamina into tooth germ penetrating into ectomesenchyme
Bud stage
28
Oral epithelium consists of two horseshoe- shaped bands of tissue which will become the two arches/jaw
Initiation stage
29
Abnormally large teeth
Macrodontia
30
Abnormally small teeth
Microdontia
31
- Proliferation of growth of cells continues - Tooth bud of the dental lamina does not grow into a large sphere surrounded by ectomesenchyme instead there is unequal growth in different parts of the tooth bud
Cap stage
32
What three structures are now considered to be tooth germ at the end of the cap stage?
Enamel organ Dental papilla Dental sac
33
What future dental tissue is produced from the enamel organ?
Enamel
34
What future dental tissue is produced by dental papills?
Dentin and pulp
35
What future dental tissue is produced by the dental sac?
PDL Alveolar bone Cementum
36
Enamel organ forms into dental papilla - Tooth within a tooth
Dens in dente
37
Tooth germ tries to divide, tooth count is normal
Germination
37
Union of two adjacent tooth germs, one less tooth count
Fusion
38
- Continuation of proliferation, differentiation and morphogenesis - Differentiation on all levels occur resulting in four types of cells within the enamel organ and two types in the dental papilla
Bell stage
39
What are the four developing tissues of the enamel organ?
Outer enamel epithelium Stellate reticulum Stratum intermedium Inner enamel epithelium
40
- More outer star-shaped cells in many layers forming a network - Supports production of enamel matrix
Stellate reticulum
41
- Compressed layer of flat to cubodial cells - Supports production of enamel matrix
Stratum intermedium
42
- Innermost layer - Tall columnar cells - Will differentiate into enamel secreting cells
Inner enamel epithelium
43
Enamel secreting cells
Ameloblasts
44
What gives rise to enamel, dentin, cementum, and pulp?
Tooth germ
45
What makes up the bulk of a tooth?
Dentin
46
What tooth relationship can be changed?
Clinical crown & root
47
What makes up a transverse ridge?
2 triangular ridges
48
What is the tooth eruption pattern?
Centrals Laterals Premolars Canines Molars
49
What teeth do we look at for occlusion?
Maxillary first molars Canines
50
What do primary maxillary 2nd molars resemble?
Permanent maxillary 1st molars
51
What primary teeth don't resemble any permanent teeth?
Primary mandibular 1st molars
52
What do primary mandibular 2nd molars resemble?
Permanent mandibular 1st molars
53
Imperfect enamel formation
Amelogenesis imperfecta
54
Imperfect formation of dentin
Dentinogenesis imperfecta
55
Absence of teeth
Anodontia
56
What are the most commonly missing teeth in order?
Maxillary 3rd molars Maxillary laterals Mand. 2nd premolars Canines
57
Extra teeth
Supernumerary teeth
58
Small supernumerary tooth forms between central incisors
Mesiodens
59
Incisors screwdriver shaped, broader cervically, notched incisal edge
Hutchinson's incisors
60
-Bull or prism teeth -Long pulp chambers -American indians and artic populations
Taurodontia
61
Severe bend or angular distortion of a tooth root
Dilaceration - flexion
62
Disturbance in ameloblasts during early enamel formation
Enamel dysplasia
63
Incomplete development of enamel localized discolored spot
Focal hypoplasia
64
Space between teeth -Typically centrals
Diastema
65
Small round nodules of enamel with a tiny core of dentin
Enamel pearls
66
An extra cusp or protuberance on surface
Dens evaginatus
67
- loss of the PDL space so the tooth root is fused to the. alveolar bone - fail to continue to erupt so they appear shorter
Ankylosis
68
Loss of tooth structure by chemical means
Erosion
69
Wearing away of enamel due to movement
Attrition
70
Cervical loss of tooth structure thought to occur from tooth bending under heavy occlusal forces
Abfraction
71
Wearing away of tooth structure by mechanical force
Abrasion
72
Dental condition that causes the outside of teeth to be lost
External resorption
73
Condition that occurs when the body's own cells break down the dentin and pulpal walls of a tooth
Internal resportion
74
Mesial buccal cusp on the maxillary first molar is aligned with the mesiobuccal groove of the mandibular first molar
class I occlusion
75
Mesiobuccal groove of mandibular molar is distal to the mesialbuccal cusp of max molar by at least the width of a premolar
Class II occlusion
76
mandible is retruded and ALL maxillary incisors are protruded
Class II division I occlusion
77
mandible is retruded and ONE OR MORE maxillary incisors are retruded
Class II division II occlusion
78
Mesiobuccal groove of mandibular molar is mesial to the mesialbuccal cusp of max molar by at least the width of a premolar
Class III occlusion
79
Anterior tooth out of alignment to the labial
Labioversion
80
Posterior tooth out of alignment to the labial
Buccoversion
81
Tooth out of alignment to lingual
Linguoversion
82
Twisted tooth
Torsiversion
83
maxillary and mandibular cusp tips line up directly over each other
End-to-end
84
Incisal edges of maxillary and mandibular incisors meet
Edge-to-edge bite
85
Posterior teeth occlude but space between anterior incisal edges
Open bite
86
Overerupted tooth that is abnormally long relative to the remaining occlusal surfaces
Supraeruption - extrusion
87
Tooth is abnormally short relative to the occlusal plane
Infraocclusion - infraversion

Tooth Morphology (6 decks)

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