208 -217 Flashcards
1
Q
pulp origin
A
ectomesenchymal cells of dental pappila
2
Q
coronal pulp
A
found in pulp horn
3
Q
radicular pulp
A
found n pulp cavity
4
Q
has mesenchymal cells that form dentins
A
formative function of pulp
5
Q
nourishes the avasc. dentin
A
nutritive function of pulp
6
Q
free nerve endings provide pain sensation
A
sensory function of pulp
7
Q
produce reparative dentin as needed
A
protective function of pulp
8
Q
single layer of odontoblast lining pulp chamber
A
odontoblstic zone
9
Q
cell free zone of Weil
A
devoid of cells (exccept during dentinogenesis)
10
Q
has parietal plexus of nerves and plexus of BV
A
pulp
11
Q
cell rich zone
A
fibroblast and undiff mesenchymal cells
12
Q
fibroblast , macrophage, leukocye, blood and lymph vessels
my. symp. nerve fiebrs
collagen 1 and 3
ground substance
no elastic fibers
A
pulp core
13
Q
A
14
Q
denticles
A
concentric layers of mineralized tissues
15
Q
true denticles
A
surround dentinal tubules or odontoblastic processes
16
Q
surround dead cells or collagen fibers
A
false denticles
17
Q
free denticles
A
located freelyin pulp chamber
18
Q
attached denticles
A
attached to ant chmber wall
19
Q
interstitial denticle
A
embedded in pulp chamber wall
20
Q
dystrophic calcification
A
calcification of collagen bundles or collagen fibers surrounding BV and nerves
21
Q
inc collagen fibers and calcifications
A
aging of pulp
22
Q
dec. pulp chamber vol.
apical 4amen size
cells
vasc
sensitivity
A
effect of aging on pulp
23
Q
avasc tissue about 10 micor meters thick covering radicular dentin
A
cementum
24
Q
compositon close to bone
A
cementum
25
origin of cementum
diff. ectomesenchymal cells of dnetal follicle
26
provide attachment for teeth
prevent root resorption during tooth movement
cementum
27
formation functon of cementum
continual apical cementum deposition accounts for continual tooth eruption and movement
28
during root formation ------- cells of dental follicle migrate through gaps in------ ----- and orient themselves along ------ dentin.
Here they diff. to ----- and sec. -------
during root formation ectomes. cells of dental follicle migrate through gaps in Hertwigs root sheath and orient themselves along radicular dentin.
Here they diff. to cementoblast and sec. cementoid
29
As cementoblast ----- away from dentin . matrix is ------ and new layer of cementum matrix secreted/ these form ---- lines, seen -----
s cementoblast retreat away from dentin . matrix is calcified and new layer of cementum matrix secreted/ these form resting lines, seen microscopically
30
cementoblast can be trapped in own matrix--\> known as
cementocytes, residing in lacunae.
31
ementocytes
recieve nutrients via caniliculi that extend to PDL
32
constantly produced at apical portion of root
cementum
(accout for continual eruption of teeth)
33
hypercementosis
deposition of excessive cementum
34
primary cementum
first formed cementum
covers coronal cementum
acellular and consists of ext. collagen fibers
35
secondary cementum
overlies primary cementum
covers apical cmemetum
can be acellular or cellular
mde of mixed collagen fibers
36
has cementocytes
cementoblsts
cementoclsts
founf in areas of cementum
celular cementum
37
devoid of cells
coronal areas of cementum
acellular cementum
38
int. coll fibers
made by cementoblasts
parralel to tooth surface
39
Ext. coll. fibers
made by PDL
arranged perpendicular to tooth surface
when trapped in cementun, know as sharpies fibers
40
mixed coll. fibers
combo of intrinsic and extrinsic fibers
41
aging effects on cementum
inc. cementum depositon
42
cementum enables tooth movement b/c is more important to resorption than alv. bone
Cementum
43
alv. bone
bone in maxila and mandlible
44
interalveolar setpum
bony projection separating 2 alveoli
45
interradicular septum
alv bone b/n roots of multirooted tooth
46
origin of alv bone
diff. ectomes. cells of dental follicle
47
alv bone proper
thin layer of cortical bone
surronds teeth and into which PDL fibers are embedded
48
bundle bone
lamina dura
crib. plate
supporting alv. bone
alv bone proper
49
part of alveolus that surrounds alv bone proper
supporting alv bone
50
coritcal bone
buccal and lingual outer surfaces of maxilla and mandible
51
thicker in mandible and post regions
cortical bones(plate)
52
cancellous bone
fills area b/n cortical plate
makes up majority of alv bones
53
adiographic appearance of lamina dura determined by
x ray beam angulation and integrity
54
radiograhic presense of crestal lamina dura
no correlation with periodontal attachment loss
55
soft Ct b/n
tooth and alv bne
56
.2 mm wide
but varies with tooth function and age
PDL
57
diff. ectomes. cells of dental follicle
origin of PDL
58
attachment of tooth to alv bone
functions of PDL
59
cells responcible for formaton of peridontium
formative function fo PDL
60
nutritive funnction of PDl
vasc network providing nutrient to cells
61
sensory function of PDL
aff. nerve fibers responcible for pain pressure and propioception
62
ell responcible for remodeling of peridontium
remodeling function of PDL
63
most common cell of PDL
fibroblst
64
cementoblasts or clasts
osteoblast and osteoclast
macrophage, mast cells, eosinophil
PDL
65
undiff. mes. cell
PDL
66
ground substance of PDL
PG
GAG
GP
H2O
67
remnants of HERS
ep. rests of Malassez
closer to cementum than alv bone
68
calcified mass either attached or unattached to root surfaces
cementicles
69
mostly collagen type 1
but also type 3
principle collagen fibers
70
transeptal fibers
interproximally over alv crest from cementum of one tooth to adjacent tooth.
resist mesial distal forces
71
72
extend obliquely from cementum just apical to JE to alv. crest
resist vertical force
alv. crest
73
horizontal colagen fibers
extend at right angle fro cementum to alv. bone
resist lat. and rotational forces
74
oblique fibers
extend obliquely from cementum to alv bone.
most abundant principle fibers
75
mainr esistance to masticory forces
oblique forces
76
apical fibers
extend from cemetum to alv bone at rot apices
resst vert. forces
77
interradicular fibrs
extend from radicular cementum to interradicular alv bone. only on multirooted tooth.
resist vert forces
78
oxytalin fibers
elastic like fibers
runnign parralel to tooth surface and bend to attach to cementum.
largely ass. with BV
79
Vasc of PDL comes from
max artery
80
periosteal veseels
to PDL from periosteum
| (primary source of vasc)
81
apical vessels
br. of dnetal vesels that supply apical regions of PDL
82
trans alv. vessels
br. of transeptal vessels that perforate alv. bone proper
83
anstomose vessels of
gingiva go to PDL
84
nerve fibers of PDL
from trigem nerve
85
free nerve ending
transmit pain and is most abundant
86
ruffini corpsucle of nerve fiber in PDL
mechanoreceptor
87
nerve fibers of PDL
have coiled and psindle endings
88
lymphatics of PDL
drain to submand. LN
except mand. incisors which drain to submental nodes
89
low PDL width
low cellularity and fiber content
aging on PDL
90
teeth in hypofunction have
dec. PDL width with fibers arranged parralel to root
91
teeth in hyperfunction
inc. PDL width.
92
initation of odontogenesis
at week 6 inutero
underlying ectomes. cells induce overyling ectoderm to prolif. ,
form localized thickening at site of each tooth called dental lamina
93
defects in inititation
anodontia or supernumeray teeth
94
week 8 in utero
bud stage
95
Bud stage; ectodermal and ectomes. cells prolif
to make round shape of tooth bud
96
cap stage
week 9 in utero
enamel organ begins to form
1 layer cells at convex region (OEE) and concave region (IEE)
97
B/n the 2 ep layers
loosely arranged Stellate retic.
(some cells of stellate retic. become densely packed near IEE and known as enamel knot
98
dental pappila
condense ectomes. cells (w/in concavity of enamel organ)
99
dentla follicle
capsule like encasing mesenchyme surround enamel organ
100
succadaneus dental lamina
form adjaent to primary enamel organ
101
dens in date
gemination
fusion
tubrcle
defected in cap stage
102
bell stage
at week 11 in utero
103
beel stage
morphogenesis and histodiff occur
104
enamel organ
well defined;
OEE
IEE
Stratum Int.
StellateReticulum
105
lateral to IEE
Stratum Int
106
becomes more sparesly arranged due to INC PG synthesis
stellate retic.
107
enamel knot disspappear
bell stage
108
tall columnar
cells of IEE
| (preameloblastS)
109
cells of dental pap.
become tall and columnar
after preameloblast forms
(called preodontoblast)
110
dental lamina disintegrates
and remnans known as
ep. rests of Serres
111
DI
AI
macrodontia, microdontia
Bell stage defect
112
start at week 14 in utero
Appos. stage
113
REE forms when the SR. collapses merging OEE and IEE
APPOS stage
114
secrete detin matrix first
odontoblast
115
secrete enamel matrix after dentin is first formed
ameloblasts
116
root formation begins
appos. space
117
dental pappilar forms pulp tissue
APPOS stage
118
dental follicle forms
alv bone
cementum
PDL
119
enamel dysplasia
concrescence
enamel pearls
APPOS Stage
120
starts at 4-6 months in utero
APPOS stage
121
tarts at DEJ
and takes 2 years to finish
mineralization phase
122
