10 - Pulp Anatomy Flashcards
(86 cards)
1
Q
what is important to know in general dental anatomy to determine pulp anatomy (“textbook knowledge”
A
- number of roots
- number of canals
- longitudinal and cross sectional shapes
- curves
2
Q
what is a two dimensional view of a three dimensional object
A
radiographic evidenec
3
Q
are canal aberrations visible in radiographs
A
NO
4
Q
are radiographs from different angles recommended?
A
YES
5
Q
if you dont have a CBCT, what should you do for radiographic evidence
A
do radiographs from different angles
6
Q
what do you explore in root canal anatomy? how?
A
explore: access prep and search for canals
thru magnification and illumination
7
Q
the shape of the pulp system reflects what
A
surface outline of crown and root
8
Q
what can different cross section of root and canal anatomy look like
A
- round
- oval
- figure 8 or ribbon shaped
- c shaped
9
Q
T/F: different shapes may appear at different levels in the same root
A
TRUE
10
Q
T/F: assume you have the MINIMUM of canals until proved otherwise
A
FALSE! assume MAXIMUM
11
Q
what cause alterations in internal anatomy
A
- age
- irritants
- calcifications
- resorption
12
Q
what shape canal
A
figure 8
13
Q
how does age alter internal anatomy
A
In molars the roof and floor of chamber show more dentin formation with age,
resulting in a disc-like shape of the chamber
14
Q
how do irritants alter internal anatomy
A
Irregular dentin formation tend to occur directly under the involved tubules
15
Q
what are the components of the pulp system
A
- Pulp Horns
- Pulp Chamber
- Root Canals
- Accessory Canals
- Apical Foramen
16
Q
A
A
lateral canal
17
Q
B
A
apical foramen
18
Q
A
A
pulp chamber
19
Q
B
A
pulp horn
20
Q
C
A
root canal
21
Q
A
A
canal orifices
22
Q
B
A
developmental grooves
23
Q
is this tooth vital or necrotic
A
necrotic! super dry
24
Q
what is funnel shape from canal orifice to apical foramen
A
root canals
25
T/F: most canals are STRAIGHT
FALSE! curved
26
where do most curves of root canal occur
in faciolingual direction (important in xrays)
27
T/F: shape and size of root canals are variable
TRUE
28
where is the chamber occupy
center of crown
29
what do the canals occupy
center of root
30
T/F: there are curves you cannot see in conventional radiographs
TRUE
31
If a root appears wide in radiograph, there is a good chance of what?
that there are two canals
32
what are canal aberrations
- isthmuses
- cul-de-sacs
-fins
33
where are accessory canals frequent
apical third
34
accessory canals can lead to what
lateral lesions
35
where can microbes gain entry into the pulp
thru lateral canals
36
what connect the floor of pulp chamber with furcation in posterior teeth
furcal canals
37
what can lead to furcation destruction (furcation lesion)
furcal canals
38
furcal canals are lesions of what origin?
endo origin
39
do furcal canals heal after endo therapy
YES
40
how may Weine's canal classifications are there
Type I->IV
41
what weine's canal classification
I
42
what weine's canal classification
II
43
what weine's canal classification
III
44
what weine's canal classification
IV
45
individual tooth anatomy can very according to what?
according to different studies and among different race groups
46
describe maxillary central incisor
of canals, curvature, percent of 2 canals
one canal
usually straight
two canals less than 0.5%
47
describe maxillary lateral incisor
of canals, curvature, percent of 2 canals
one canal
curvature in apical third
two canals less than 0.5%
48
describe maxillary cuspid
One canal
Wide in bucco-lingual dimension
Apical curve
Two canals never been reported
49
what type is the hardest one to treat
Type IV
50
over 90% of maxillary 1st bicuspid have how many canals?
2 canals
51
what percent of maxillary first bicuspid have three canals
3-6%
52
maxillary second bicuspid has 53% ___ canal. the other half has hoe many canals
53% = 1 canal
46% = 2 canals
1% = 3 canals
53
how many roots does maxillary 1st molar usually have? how many canals?
almost always has three roots, four canals
54
what are the names of the canal of maxillary first molar
MB canal, MB2 canal, DB canal P canal
MB2 always present but sometimes cannot find it
55
what is the 4th canal called in max 1st molar? where?
Fourth canal is called mesio-lingual canal or MB2 and is located in the mesio-buccal root, lingual
56
lingual of maxillary first molar is what type canal
type II
57
what is most likely amount of roots in max second molar
3 roots = 60%
4 canals = 30% (when present it is located in M-B root)
2 roots = 25%
1 root = 10%
58
when present in max second molar, where is the 4th canal present
mesio-buccal root
59
describe canals of mand central
70% one canal
30% two canals
60
describe canals of mand laterals
55% one canal
45% two canals
61
are second canals common in mandibular incisors?
YES!
62
how many canals in mandibular canine and percents
70% - one canal
30% - two canals
63
when only one canal present in mandibular canine, it is very wide where
bucco-lingually
64
how many canals and percent in mandibular first bicuspid
70% one canal
29% two canal
65
T/F: any mandibular tooth is capable of having more than one canal
TRUE
66
how many canal and percent of mandibular second bicuspid
85% - one canal
12% - two canals
3% - two foramina
67
how many canals/foramina in mandibular first molar MESIAL root
Two canals/two foramina 60%
Two canals/one foramina 40%
68
how many canals/foramina in mandibualr first molar DISTAL root
One canal 70%
Two canals one foramen 20%
Two canals two foramina 10%
69
how many canals/foramina in mandibular second molar MESIAL root
Two canals / two foramina 40%
Two canals / one foramina 35%
One canal 25%
70
how many canals/foramina in mandibular second molar DISTAL root
One canal 92%
Two canals / one foramina 5%
two canals / two foramina 3%
71
mandibular second molars have what shaped canals
C shaped
72
T/F: Weine's classification is per tooth not by root?
FALSE! it is per ROOT not by tooth
73
T/F: When two canals are present you need to add up the different types
that have two canals to come up with a total number
TRUE
74
how do you determine the total number of canals in a tooth
count all canals in each root and then add them all up
75
what CBCT view
coronal view
76
what CBCT view
sagital view
77
what CBCT view
axial view
78
A 4th canal is usually present on maxillary molars. Which of the following roots of
maxillary molars contain 2 canals?
mesiobuccal root
79
T/F: accessory canals are more frequent on the middle third of the root
FALSE! apical third!
80
approximately what pecentage of maxillary 1st premolars have two canals
over 90%
81
T/F: the shape of the canal is uniform al throughout the length of the canal
FALSE
82
T/F: it is impossible to instrument the entire root canal system
TRUE
83
T/F: canals are straight in most teeht
FALSE
84
T/F: one of the limitations of radiographs is that it is two dimensional view of a three dimensional object
TRUE
85
T/F: furcation lesions can occur due to the presence of furcal canals
TRUE
86
T/F: as the patient ages the pulp chamber tends to get smaller
TRUE
