missed terms. anatomy 1 Flashcards
1
Q
where do gums come from
A
vestibular lamina
2
Q
OEE cells are
A
cuboidal
3
Q
sr cells are
A
star shaped
4
Q
stratum intermedium cells are
A
flat layers
5
Q
iEE cells are
A
short columnar
6
Q
what determines tooth type
A
late bell stage, IEE folds according to tooth type
- Dental papilla
7
Q
what else do ameloblasts secrete
A
basemennt membrane
8
Q
when is KLK4 protein released
A
maturation of enamel
9
Q
when is MMP20 released
A
secretory stage of enamel
10
Q
enamel tufts
A
made of tuftelin
- form when enamel extends innto DEJ
11
Q
enamel spindles
A
- formed when odontoblast processes are embedded in enamel
12
Q
age changes of enamel
A
- decreased pore size, extrinsic staining, water forced out
13
Q
what starts odontogenesis
A
epithelium
14
Q
how does dental lamina form
A
ecctomesenchye signals oral epi to form ridge
15
Q
where does enamel organ come from + what does it do
A
oral epi from dental lamina
- determines shape of crown
- forms DGJ
16
Q
where is ectomesenchyme from
A
neural crest
17
Q
what does the mesenchyme form
A
papilla, sac, and pulp
18
Q
apposition stage
A
IEE to preamelo to dental pulp to preodonto to odonto to predentin to ameloblast to enamel matrix
- DEJ forms
- Odontoblast processes
- prismless enamel: secretory ameloblasts
- enamel prisims: formed by toms process (mineralized)
19
Q
ename is secreted
A
down@
20
Q
what is pulp
A
specialized loose connective tissue
21
Q
cell free zone of pulp
A
has blood vessels
22
Q
cell rich zone of pulp
A
fibroblasts
23
Q
what cells can differentiate in the pulp
A
odnotoblast and mesenchymal cells (make more odonto)
24
Q
immune cells in the pulp
A
macrophage (eat old cells), lymphocyte (antibody), dendridic cells ( antigen presenting shit)
25
what is in pulp matrix
pulp soup
- collagen, type I and III
- grounn substance of glycans that picck up water
26
where does nnerve in pulp come from
5th nerve
| - C fibers (sympathetic) that sense pressure in pulp tissue and blood flow
27
true pulp stone
- odontoblast and tubules
| - ectopic
28
false pulp stone
- concentric ring of lamellae
29
age change inn pulp
- fibrosis, decreased volume
30
whats in tooth germ
- enamel organ, papilla and saca
31
where to find primary dentinn
- major portion of crown and root dentin
32
where to find secondary dentinn
alonng pulp dentin border
33
what is ree made of
ameloblast and papillary lager
| - all 4 layers of organ condense
34
dentinogenesis
- ree grows apiccal. forms HERS (OEE and IEE). induces DP outer cells to become root odontoblasts. Secrete circumpulpal predentin. HERS detaches
35
what determines root humber
- the growth rate of epi diaphragm determinens the number of roots
- also the number of ingrowths in the cervical loop
36
why does hers die
to allow sac cells in to make cementum
37
where to find cemetoccytes
- in apical 1.2 to 2/3 of root!
38
WHERE DO cementoblasts come from
- dental sacc, but also HERS cells!
39
how is PDL ligament made
- sac turns into fibroblasts and they become anchored in cementum as it is made
40
exposed root dentin
Because HERS did not break up, no cementum formation could be initiated by dentin and sac. Leads to deposed dentin in root.
41
enamel pearls
When HERS do not break up and epithelial root sheath remain adherent to predentin, they may differentiate into fully functional ameloblasts and deposit enamel, forming enamel pearls
42
accessory root cNAL
While HERS is forming root surface, blood cells are differentiated and neurovascular bundles start to confine the blood cells.
HERS has to make a detour to accommodate the neurovascular bundles.
Odontoblasts are not formed in these areas and no dentin is deposited. Results in accessory canals
43
how long till deciduous teeh roots are done
1-1.5 years
44
how long till permanent teeh roots are done
2-3 years
45
bone during eruption
bone is resorbed so roots and grow. bony fundus. during eruption, bone trabeculae fill in the fundus to form bone ladder.
46
where does DGJ come from
REE
47
primary dentitionn numbring
start from upper right as A then end at lower right at T
48
palmer numbering
A-E but with angle. REMEMBER LEFT AND RIGHT
49
federation numbering
5,6,7,8 in quadrants. upper right is 5, then upper left is 6, lower left is 7. then 55,54 from out to the MIDDLE
50
when does development of bb teeth start
6-10 week
51
when does bb teeth calcification start
14-20 wk
52
how much of crown is formed at birth
1/2 to 5/6
53
when does enamel formation complete
- 12 mos of age
54
when do teeth reupt
6 mos- 2.5 years
55
when does full primary dentition form
2.5-6 yrs
56
when does permament dentition start
12 years
57
teeth start exfoliating at
6-12 years
58
first teeth to erupt
o+P mandibular incisor central
59
sequence of primary tooth reuption
7+ 4 rule. at 7 mos, there should be 2 teeth. 11 should be 4
- usually erupt in pairs, starting with mandible
- front to back but the 1st primary molar erupts b4 canin
60
maxillary primate space
- between lateral and canine
61
mandublar primate spacce
between canine and molar
62
mesial step terminal plane
right chair
- the distal surface of the lower second primary molar is more mesial to distal surface of upper second primary molar
- normal
63
distal step terminal place
- distal surface of the lower second primary molar is more distal to the distal surface of the upper second primary molar
- left chair
64
class 3
excessive mesial step
- huge right chair
- the cusp of the max primary canine is distal to the distal surface of the mand primary canine
65
overjet
horizontal distance
- good is 0-4 mm
- too much means bonne malocclusionn
66
overbite
vertical distance
- good is 10-40%
- too much is due to bad habit like suck thumb
67
primary teeth vs permaneny (9)
- fatter so more MD width
- more white (smaller ratio of enamel to dentin)
- more x shaped.
- contact area because teeth touch each other more
- less pits
- thinner enamel
- enamel rods slope horizonntal (occlusally)
- roots are narrow and wide
- large pulp chamber with higher pulpal horns
68
molar relationship
the mesiodistal relationship between the distal surfaces of the upper and lower second primary molars (terminal plane)
69
stem cells properties
self renew, undifferentiated
70
embryonic stem cell origin
blastocyst
- can give rise to 3 cell layers??meso,ecct
- pluripotent
- tumor forming
71
adult stem cell
- multipotent
- form many things in body
- no tumor forms
72
mesenchymal stem cell
MSC
- have specific marks and niche
- form colonies of cells that do diff stuff
- can do tissue engineering, immunomodulation and cause disease
73
dental pulp stem cell
DPSC
- good prolif ability
- can form mineralized structure like bone and enamel
- even dentin and pulp, neurons
74
stem cell recruitment
can recruit other cells (even if not human) to make ccells!
75
colony cluster
can isolate a cell from there with a specific fxn but still won't know what it will do
76
baby teeth stem cell
SHED
- super proliferation
- pulp, dentin, neurons
- can do autology
77
pdl stem cell
PDLSC
- cementoblast, cementum, collagen, fibroblast,
- used in periodontitis (treat perio disease)
- autology common use
78
autology
- take stem cells out of patient, generate, and put them back in
79
Apical pailla stem cell
SCAP
- root tip forms (bio root)
- dentin??
- PDL ligamennt forms around it
80
gingiva stem cells
- GMSC
- leave no scar, wound healing compared to skin
- immune fxn
- higly prolif
- ex colitis. helps protect tissue from damage
- used in allograft skin setting and wound healing since it stops tissue rejection by blocling some immune thing
81
dental stem cells can regenerate
- pulp. pdl. and periodontal tissue in human
82
dental stem cells are more prolif than
bone marrow cells
83
DPSC and SHED in mice can regenerate
dentin
84
cap stage
- enamel organ forms
- papilla forms
- sac forms
85
types of enamel demineralization
1,2,3
86
are cells present in dentin
only one, tomes fiber, which are odontoblast processes
87
reactive and reparative dentin
- reactive is formed by old odonto and are continuous with tubules
- reparative is new odonto, not cts
88
mantle dentin is
type III collagen
89
circumpulpal dentin is
type I collagen
90
where to find sclerotic dentin
- apical 1/3 of root and crown midway btw DEJ and pulp
91
where to find dead track dentin
- coronal dentin
92
when is tooth calcification done
3-4 years of age
93
when does crowding mess with teeth
less than 3-6 mm is 20% crowding, then 3 mm is 50, then 0 is 66 then 100 crowding
94
class I
slight mesial step, but considered flush
95
class II
distal step
96
class III
excessive mesial step
97
colony forming unit - fibroblast
formed by DPSC, also PDLSC
