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Semester 2 Biological Sciences 2 > Tooth Eruption > Flashcards

Tooth Eruption Flashcards

(102 cards)

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1
Q

Eruption is part of __________________

A

tooth development

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2
Q

thickening of the epithelium through cell division determines the position where a row of teeth will form

A

primary epithelial band

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3
Q

further epithelial thickening and bifurcation into dental and vestibular lamina

A

dental and vestibular laminae

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4
Q

Invagination of DL determines the locations where individual teeth will
develop. Invagination of DL is stimulated by ectomesenchymal cells
expressing Pax9. Tooth type is also determined at this stage, according to
other transcription factors expressed in the ectomesenchyme

A

bud stage

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5
Q

Beginning of tooth morphogenesis and histodifferentiation processes. The
DL forms the enamel organ (EO). Cells of the EO will differentiate into inner
and outer enamel epithelia, stellate reticulum and stratum intermedium.
EMC will differentiate into dental follicle and dental papilla

A

cap stage

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6
Q

Extension of cervical loop. Enamel knot(s) determine formation of cusps.

A

bell stage

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7
Q

appositional deposition of dentin and enamel

A

late bell stage

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8
Q

Cervical loop transforms into Hertwig epithelial root sheet (HERS), which
becomes an organizing center of root formation. Dentin is deposited
alongside HERS. The HERS fragments and cells of dental follicle deposit
cementum and form PDL. Once the length of a root is complete, HERS
changes its direction inward leading to narrowing of the apical foramen

A

root formation

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9
Q

primary oral cavity is lined with what

A

ectoderm derived epithelium

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10
Q

beneath epithelium, there is what

A

ectomesenchyme

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11
Q

areas of the oral epithelium where dentition will form thicken to form the ________________

A

primary epithelial band

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12
Q

the primary epithelial band splits into what

A

dental lamina and vestibular lamina

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13
Q

dental lamina will develop into buds where what will form

A

individual teeth

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14
Q

where a tooth will form there is invagination of the dental lamina into a ________ and condensation of _____________ around it

A

bud
ectomesenchyme

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15
Q

what stage is the type of tooth and position determined

A

bud stage

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16
Q

the ________ forms from the dental lamina and starts to develop different cell layers

A

enamel

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17
Q

what stage does enamel form in

A

cap stage

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18
Q

what cell layers develop from the enamel/dental lamina

A

outer enamel epithelium
stratum reticulum
inner enamel epithelium
stratum intermedium

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19
Q

cells in the ectomesenchyme form the _____________ and the ______________

A

dental follicle and the dental papilla

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20
Q

when do the dental follicle and dental papilla form

A

cap stage

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21
Q

cells continue to differentiate and the stratum intermedium is evident in this stage

A

bell stage

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22
Q

where the outer enamel epithelium joins the inner enamel epithelium and extends apically

A

cervical loop

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23
Q

when does the cervical loop form

A

bell stage

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24
Q

the enamel knots formed in the bell stage stimulate growth of ________

A

cusps

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25
the outer cells of the dental papilla become ___________ that secrete dentin
odontoblasts
26
when is dentin secreted
apposition stage
27
cells in the inner enamel epithelium become __________ that secrete enamel
ameloblasts
28
when is enamel secreted from ameloblasts
apposition stage
29
once crown formation is complete, the developing tooth does what
begins to erupt
30
while the tooth erupts, what is still forming
roots
31
what forms the hertwig's epithelial root sheath
cervical loop
32
what does HERS guide
root formation
33
when do primary teeth start developing
6th week of prenatal development
34
when do primary teeth start erupting
6 months old
35
when do permanent teeth start developing
14th week of prenatal development
36
when do permanent teeth begin erupting
6 years old
37
what teeth are nonsuccedaneous
first, second, and third molars
38
develop from successional dental lamina lingual to developing primary teeth
succedaneous teeth
39
develop from posterior extension of dental lamina called the accessional dental lamina
nonsuccedaneous teeth
40
in late cap/early bell stage of the primary tooth, the lingual portion of the dental lamina becomes the what
successional lamina
41
arises by posterior growth of the general dental lamina
accessional lamina
42
what does accessional lamina give rise to
molar teeth
43
permanent premolars, incisors, and canines arise from
successional lamina
44
what are the three phases of tooth eruption
pre-eruptive pre-functional functional
45
movement of the developing teeth within the jawbone
pre-eruptive phase
46
when does the pre-eruptive phase take place
during crown formation, before eruption
47
what does pre-eruptive phase require
bone remodeling
48
succedaneous teeth develop ___________ to primary teeth
lingual
49
after crown formation is complete, ameloblasts secrete a _____________ over the tooth
dental cuticle
50
the enamel organ compresses in the pre-eruptive phase to form the
reduced enamel epithelium
51
eruptive movement of teeth into functional positions within the jaw
pre-funcitonal phase
52
when does the pre-functional phase occur
after crown is complete
53
when does the pre-functional phase end
when the tooth is fully erupted and makes contact with opposing tooth
54
in the pre-functional phase the reduced enamel epithelium fuses with the ___________ lining the oral cavity
oral epithelium
55
the reduced epithelium releases enzymes to disintegrate the __________ part of the fused tissue
central
56
as the tooth erupts, the ________ part of the fused epithelium peels back
coronal
57
the fused tissue that remains at the neck of the erupting tooth will form an initial ______________ around the tooth
junctional epithelium
58
as the cusp of the tooth pierces through the fused epithelial layer, the _____________ still covers the surface of the crown
dental cuticle
59
starts once the teeth are in occlusion
functional phase
60
when does the completion of the root take place
functional phase
61
when does primary dentition erupt
6 months to 2 years
62
when does primary dentition shed
6 to 12 years
63
when does the permanent dentition erupt
6 years to about 17-21 years
64
what primary teeth erupt first
mandibular central incisors
65
when do primary mandibular central incisors erupt
6 months
66
what are the last teeth to erupt in the primary dentition
maxillary second molars
67
when do primary maxillary second molars erupt
25 months
68
generally speaking, when is primary eruption complete
30 months or 2.5 years
69
what is the eruption order of the primary dentition
central incisors lateral incisors 1st molars canines 2nd molars
70
when do primary mandibular central incisors erupt
6-10 months
71
when do primary maxillary central incisors erupt
8-12 months
72
when do primary maxillary lateral incisors erupt
9-13 months
73
when do primary mandibular lateral incisors erupt
10-16 months
74
when do primary maxillary 1st molars erupt
13-19 months
75
when do primary mandibular 1st molars erupt
14-18 months
76
when do primary maxillary canines erupt
16-22 months
77
when do primary mandibular canines erupt
17-23 months
78
when do primary mandibular 2nd molars erupt
23-31 months
79
when do primary maxillary 2nd molars erupt
25-33 months
80
what are the first primary teeth to shed
central incisors
81
what does tooth shedding require
osteoclasts and odontoclasts
82
resorb alveolar bone between the primary and secondary teeth
osteoclasts
83
resorb the dentin, cementum and a portion of the enamel crown from the primary tooth
odontoblasts
84
what permanent tooth erupts first
first molars
85
when do permanent first molars erupt
6 years old
86
what are the last permanent teeth to erupt
third molars
87
when do permanent third molars erupt
17-21 years
88
what is the eruption order for the permanent dentition
1st molars central incisors lateral incisors mandibular canine 1st premolars 2nd premolars maxillary canines 2nd molars 3rd molars
89
when do permanent mandibular and maxillary 1st molars erupt
6-7 years
90
when do permanent mandibular central incisors erupt
6-7 years
91
when do permanent maxillary central incisors erupt
7-8 years
92
when do permanent mandibular lateral incisors erupt
7-8 years
93
when do permanent maxillary lateral incisors erupt
8-9 years
94
when do permanent mandibular canines erupt
9-10 years
95
when do permanent maxillary 1st premolars erupt
10-11 years
96
when do permanent mandibular 1st premolars erupt
10-12 years
97
when do permanent maxillary 2nd premolar erupt
10-12 years
98
when do permanent mandibular 2nd premolars erupt
11-12 years
99
when do permanent maxillary canines erupt
11-12 years
100
when do permanent mandibular 2nd molars erupt
11-13 years
101
when do permanent maxillary 2nd molars erupt
12-13 years
102
when do permanent maxillary and mandibular 3rd molars erupt
17-21 years

Semester 2 Biological Sciences 2 (16 decks)

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