Lower teeth Flashcards
1
Q
Smallest crown of all the teeth
A
Lower central primary incisor
2
Q
First tooth to erupt
A
Lower central primary incisor
3
Q
Symmetry in Lower central primary incisor?
A
“It has great symmetry”
4
Q
Lower central primary incisor Labial surface:
Developmental grooves?
A
None. flat face
5
Q
Lower central primary incisor Labial surface:
Crown compared to permanent?
A
Wider than its length
6
Q
Lower central primary incisor Labial surface:
incisal border?
A
no relevant details:
straight border and equal angles
7
Q
Lower central primary incisor how many roots?
A
One long root
8
Q
Lower central primary incisor root canals and pulp horns? (3)
A
- One root canal
- Two pulp horns
- Mesial pulp horn is more pronounced
9
Q
Lower lateral primary incisor compared to central incisor?
A
-bigger EXCEPT buccolingually
10
Q
Lower lateral primary incisor Crown Labial Surface:
incisal edge
A
slopes cervically in the distal surface
11
Q
Lower lateral primary incisor Crown Labial Surface:
mesial angle
A
Slightly more acute than distal angle
12
Q
Lower lateral primary incisor Crown Labial Surface: convexity/concavity compared to central incisor?
A
Slightly more convex than central incisor
13
Q
Lower lateral primary incisor Crown Lingual Surface (2)
A
- Cingulum slightly more defined.
* Concave
14
Q
Lower lateral primary incisor Crown Mesial and distal surfaces?
A
Convex
15
Q
Lower lateral primary incisor Crown incisal aspect? (2)
A
- Very similar to the central incisor.
* The incisal border is slightly oblique towards distal
16
Q
Lower lateral primary incisor root?
A
One conic root
17
Q
Lower lateral primary incisor pulp chamber? (2)
A
o It follows the external morphology.
o One root canal and two pulp horns, being bigger the mesial one.
18
Q
Lower primary canine compared to upper primary canine?
A
- very similar but slightly smaller
- Sharper (upper is more bulky)
19
Q
Erupts at 17-23rd month?
A
Lower primary canine
20
Q
Lower primary canine crown labial surface:
developmental lobes?
A
3
21
Q
Lower primary canine crown labial surface:
Slope compared to upper?
A
Opposite to the maxillary canine: The distal slope is longer than the mesial one.
22
Q
Lower primary canine crown lingual surface? (3)
A
- Less accentuated cingulum.
- No central ridge.
- More convex.
23
Q
Lower primary canine crown mesial and distal surfaces?
A
Similar to upper canine.
24
Q
Lower primary canine crown incisal aspect?
A
Similar to upper canine.
25
Lower primary canine root? (2)
o Conic
| o 2 mm shorter than the upper canine.
26
Lower primary canine pulp chamber? (2)
o It follows the external morphology.
| o It has one conduct and three pulp horns, being the central one the most accentuated.
27
14-18th month eruption?
Lower first primary molar
28
Lower first primary molar compared to maxillary second molar?
smaller
29
Lower first primary molar crown BUCCAL surface: Mesial outline of crown ? (2)
straight
| crown constricts at the cervix
30
Erupts at 6-10 months
Lower central primary incisor
31
Lower central primary incisor Lingual surface:
| marginal ridges/cingulum?
has both
32
Lower central primary incisor Lingual surface:
| middle and incisal thirds?
flattened surface or slight concavity
33
Lower central primary incisor Lingual surface:
| compared to labial surface?
narrower
34
Lower central primary incisor Lingual surface:
mesial and distal borders?
have a marked constriction at the cervix
35
Lower central primary incisor mesial surface:
| convexity?
at the cervical third is pronounced
36
Lower central primary incisor mesial surface:
| labiolingual measurement?
only a mm less than the primary maxillary central incisor
37
Lower central primary incisor distal surface:
| compared to mesial?
cervical line of the crown is less curved towards
| the incisal ridge than on the mesial surface
38
Lower central primary incisor incisal surface:
| cingulum?
Definite taper towards the cingulum
39
Lower central primary incisor incisal surface:
| Labial surface?
flat and slightly convex
40
Lower central primary incisor incisal surface:
| Lingual surface?
Flat and slightly concave
41
Lower central primary incisor root:
What surface is narrower?
lingual surface
42
Lower central primary incisor root:
| distal surface?
can find a developmental depression
43
On which tooth can we find a developmental depression on the distal surface of the tooth?
Lower central primary incisor
44
Which tooth's root measures three times the crowns length?
Lower central primary incisor
45
Lower central primary incisor root length?
3x the crowns length
46
Lower central primary incisor pulp chamber? (3)
Follows external morphology.
- 1 root canal 2 pulp horns
- mesial more pronounced
47
Erupts at 10-16th month?
Lower lateral primary incisor
48
Lower lateral primary incisor root inclination?
towards distal and labial
49
Lower canine root inclination?
towards distal and labial
50
Lower first primary molar crown BUCCAL surface:
| distal portion?
shorter
51
Lower first primary molar crown BUCCAL surface:
| cusps?
- 2 distinct buccal cusps
| - mesial cusp is bigger
52
Lower first primary molar crown BUCCAL surface:
| developmental groove?
none
53
Lower first primary molar crown convergence?
lingually
54
Lower first primary molar crown lingual surface:
| distolingual cusp shape?
rounded
55
Lower first primary molar crown lingual surface:
| mesiolingual cusp shape? (2)
long and sharp
56
Lower first primary molar crown lingual surface:
| mesial marginal ridge?
well developed
57
Lower first primary molar crown lingual surface:
| cervical line?
straight
58
Lower first primary molar crown lingual surface:
| lingual groove?
exists
59
Lower first primary molar crown mesial surface:
| curvature? (2)
extreme curvature at the cervical third of the
| buccal surface: Zuckerkandl tubercle.
60
Lower first primary molar crown mesial surface:
| cusps?
Both mesial cusps are seen, as well as a well-defined marginal ridge
61
Lower first primary molar crown mesial surface:
| Marginal line?
curves towards occlusal
62
Lower first primary molar crown distal surface:
| cervical line?
does not curve
63
Lower first primary molar crown distal surface:
| lingual & buccal lengths?
more equal
64
Lower first primary molar crown distal surface:
| cusps compared to mesial?
distal cusps are not as sharp as the mesial cusps
65
Lower first primary molar crown distal surface:
| distal marginal ridge?
not well defined
66
Lower first primary molar crown occlusal aspect? (9)
- Central developmental groove
- Lingual developmental groove
- Distal marginal ridge
- Mesial marginal ridge
- Distal triangular fossa
- Mesial triangular fossa
- Central fossa (closer to distal)
- Buccal developmental groove
- Transverse ridge (connects Mb with ML
67
The transverse ridge of the lower first primary molar connects...?
MB with ML
68
Lower first primary molar cusps?
4: mesiobuccal, distobuccal,
| mesiolingual and distolingual.
69
Lower first primary molar root buccal and lingual aspect? (2)
long and slender
| -spread greately at apical third beyond crown's outline
70
Lower first primary molar root mesial and distal aspect:
| root end shape?
flat and square
71
Lower first primary molar root mesial and distal aspect:
| depressions?
may see a developmental depression
72
Lower first primary molar root mesial and distal aspect:
| buccal and lingual outlines?
go straight to the crown
73
Lower first primary molar root mesial and distal aspect:
| distal root shape?
rounded and shorter
74
Lower first primary molar root pulp chamber? (3)
o It follows the external morphology.
o It has three root canals (two in the mesial
root).
o And four pulp horns, being the most pronounced the mesiobuccal.
75
Lower secondary primary molar compared to first permanent molar?
Very similar to the first permanent molar
76
Erupts at 23-31st month?
Lower second primary molar
77
Lower secondary primary molar isomorphism?
yes
78
Lower secondary primary molar crown buccal surface:
| cervical diametre?
narrower than the central diameter
79
Lower secondary primary molar crown buccal surface: developmental grooves?
mesiobuccal and a distobuccal developmental
| grooves which divide the surface in three cusps
80
Lower secondary primary molar crown buccal surface: mesial groove?
mesial groove ends in a little fossa
81
Lower secondary primary molar crown lingual surface:
| Cusps? (2)
- Two lingual cusps of almost equal dimension are seen
| - short lingual groove between them is present.
82
Lower secondary primary molar crown lingual surface:
| cervical line?
straight
83
Lower secondary primary molar crown lingual surface:
| Mesial portion?
slightly higher
84
Lower secondary primary molar crown lingual surface:
| buccal cusps?
a portion of each can be seen
85
Lower secondary primary molar crown mesial surface:
| marginal ridge?
high
86
Lower secondary primary molar crown mesial surface:
| buccal contours?
More prominent
87
Lower secondary primary molar crown mesial surface:
| cusps?
lingual cusp is longer and higher
88
Lower secondary primary molar crown mesial surface:
| convergence?
buccal and lingual faces converge towards
| lingual
89
Lower secondary primary molar crown distal surface:
| crown?
Not as wide as mesially
90
Lower secondary primary molar crown distal surface:
| cusps?
distolingual cusp is well developed
91
Lower secondary primary molar crown distal surface:
| cervical line?
regular
92
Lower secondary primary molar crown occlusal surface? (6)
- Central groove in W shape
- Buccal grooves
- Lingual grooves
- Mesial ridge
- Distal ridge
- Mesial and distal grooves.
93
Lower secondary primary molar crown occlusal surface shape?
W
94
Lower secondary primary molar crown occlusal surface:
cusps? (3)
5
- 3 buccal
- 2 lingual
95
Lower secondary primary molar cusp sizes? (2)
- Three buccal cusps: central> MB>DB
| - Two lingual cusps : similar in size
96
Lower secondary primary molar root buccal and lingual aspect?
(2)
* They are long and slender.
| * The point of bifurcation is right under the cementoenamel junction
97
Lower secondary primary molar root mesial and distal aspect? (2)
• The mesial root is broad and flat with a blunt
apex
• The distal root is very similar but tapers more
toward apical
98
Lower secondary primary molar root pulp chamber? (3)
o It follows the external morphology.
o The mesial pulp horns are more accentuated
o It has three root canals: two in the mesial root
