Dental Anatomy VI - Final Flashcards
(105 cards)
1
Q
Cusp or cuspal ridges descend from the tips of cusps in lateral directions, either _____ or _____ from the midline of the arch.
A
Toward
Away
2
Q
Every posterior tooth cusp has ___ ridges that emanate from the tip, but only ___ is ______
A
4
One
Triangular
3
Q
How many cuspal ridges emanate off each cusp in posterior teeth?
A
2
there are 4 total, 1 triangular
4
Q
The Apical root sections are divided into the following 3 sections:
A
Cervical 1/3
Middle 1/3
Apical 1/3
5
Q
What is the last primary tooth to begin calcification?
When does this occur?
A
Maxillary 2nd Molar
19 Weeks in Utero
(A and J)
6
Q
What are the first primary teeth to begin calcification in utero?
When does this occur?
A
Maxillary/Mandibular central incisors
14 weeks
7
Q
First evidence of calcification has occurred by ___ weeks in utero
A
20
8
Q
At 9 Months of age, what teeth are visible?
A
Mandibular Central Incisor only tooth visible
9
Q
What is the order of eruption for Maxillary Permanent Teeth?
A
1st Molar CI LI 1st Premolar 2nd Premolar Canine 2nd Molar 3rd Molar
10
Q
What Primary teeth remain at 8 years of age?
A
Canine
1st Molar
2nd Molar
11
Q
T/F
3rd Molars have begun calcification at 8 y.o.
A
False
12
Q
T/F
Permanent 2nd Molars have erupted at 8 y.o.
A
False
13
Q
T/F
2nd Molars have erupted at 8 y.o.
A
False
14
Q
What 4 teeth have not erupted at 11 y.o.
list in order of eruption
A
Mandibular 2nd Premolar
Maxillary Canine
2nd, 3rd Molars
15
Q
Paleontological Terms for the following: Mesiofacial cusp *Distofacial cusp Mesiolingual cusp Distolingual cusp
A
Paraconus
*Metaconus
Protoconus
Hypoconus
16
Q
Proximal Contact areas of the Maxillary Anterior Teeth:
A
IJJMJM
17
Q
What periodontal fibers resist forceful impaction?
A
Oblique
18
Q
What are the 5 clinical issues associated with ill-formed embrasures (line angles over/underdeveloped)?
*what wouldn’t we see?
A
Malposition/misalignment Oversized Proximal contacts Lack Proximal contact Fracture Caries
*anything anatomically correct
19
Q
T/F
Lingual surface of the Primary Mandibular Canine is LESS developed than Primary Maxillary Canines.
A
True
20
Q
Describe the cusp tip of the Primary Mandibular Canine
A
Mesial to center
21
Q
Is there a root surface depression in the Primary Mandibular Canine?
A
Negative
22
Q
3 lingual features of the Primary Mb Canines
A
Lingual ridge
Mesiolingual fossa
Distolingual fossa
23
Q
In what direction does the Primary Maxillary 1st Molar taper?
A
Distally
24
Q
T/F
Mesial half of Primary Max 1st Molar and the mesial marginal ridge is larger/more prominent
A
True
25
Where is the triangular ridge of the Primary Max 1st Molar?
Mesial half
26
Along with a triangular ridge in the Mesial half of the Primary Max 1st Molar, what other ridge is prominent?
Oblique
27
What is the crown outline form of the Primary Mandibular 1st Molar?
Rhomboidal
28
Cusp sizes of Primary Mb 1st Molar from largest to smallest:
Mesiofacial
Mesiolingual
Distofacial
Distolingual
29
Name the Major fossae on the Primary Mb 1st Molar.
Central
Mesial Triangular
Distal Triangular
30
Crow convergence of the Primary Mb 1st Molar:
Lingual
31
What tooth doesn't resemble any other in the Primary or Permanent dentition?
Primary Mb 1st Molar
32
Primary Mb 2nd Molar:
| Proximal contact areas located?
Middle 1/3
33
Primary Mb 2nd Molar:
How many cusps?
All be seen from what angle?
5
| Facial
34
Primary Mb 2nd Molar:
| Describe cervical line
Apical Dip in area of Bifurcation
35
Primary Mb 2nd Molar
Describe the roots
(how many? which longer?)
```
2 roots (mesial and distal)
Mesial Longer
```
36
What is the tooth anomaly in which fusion of the permanent dentition is uniform?
Gammate
37
Permanent Max C.I.
Which is the greater width?
Interproximal contact ____ faciolingually
Mesiodistal (8.5mm)
Faciolingual (7.0 mm)
Centered
38
Permanent Max C.I.
| The incisal edge is _____ and ____ to the mesiodistal bisecting plane
Straight
| 90 degrees
39
Permanent Max C.I.
| Incisal edge is _____ to Faciolingual bisecting plane
Parallel
40
Which line angle is more developed in the Permanent Max C.I.?
Mesiofacial
| as opposed to Distofacial
41
Max L.I.
| What shape is the crown?
Trapezoidal
42
Max L.I.
| Which line angle more rounded?
Distal
| but both described as rounded
43
Max L.I.
| Describe the root apex
Distal curvature
44
Mb C.I.
| Describe proximal contact area
Faciolingual Midpoint
45
Mb C.I.
| Measurement of the crown facially is ____ greater than lingually
0.5 mm
46
T/F
| The crests of the cervical ridges of the Mb C.I. are at the same level Facially and Lingually.
False
| higher lingually
47
Mb C.I.
| The wide and long root surface depressions are deeper on what side?
Distal root surface
48
The Apex of the root in the Mb C.I. will be ____ with the faciolingual long axis bisector
Even
49
Mb L.I.
| Icisal Ridge is _____
Lingual
50
Mb L.I.
| The crest of the facial cervical ridge relates how to the lingual cervical ridge?
Higher Incisally
51
Mb L.I.
| Describe the Cervical Line from the mesial perspective
Curves Incisally at middle of tooth faciolingually
52
Mb L.I.
| What is a distinctive characteristic of the mesial view?
Incisal ridge curvature at the distal end is more inclined lingually, making it visible
53
What do you need to know about the root of the Mb L.I.?
Broad depression for most of length
54
Max Canine
| Cusp tip ____ with root tip and height of curvature of cervical line (distal view)
Aligned
55
Max Canine
| Where is the Pronounced Concavity?
Cervical to Distal contact area
*not really on/minimially on mesial surface
56
Mb Canine
| Which outline is straight and continuous?
Mesial
57
Mb Canine
Cusp tip location:
Cervical line decription:
Mesial
Semicircular, dips apically
58
Max 1st Premolar
Lingual cusp less/more pointed than facial?
*How much shorter?
Less pointed
*1.0 mm shorter
59
Describe the Lingual cusp of the Max 1st Premolar
How relate to cuspal ridge length
Slightly mesial
*so Mesial cuspal Ridge Shorter
60
Max 1st Premolar
What meets at the Mesial Marginal Ridge?
What direction do they travel?
Facial and Lingual cuspal ridges
Cervically
61
Max 1st Premolar
| The crest of the Mesial Marginal Ridge is ______ to the faciolingual long axis bisector
Perpendicular
62
Max 1st Premolar
Facial cusp tip is ____ to the mesiodistal bisector and ____ the distance from the _____ outline of the faciolingual bisector of the crown
Distal
One third
Facial
63
Max 1st Premolar
| Describe the lingual cusp tip
Mesial
Nearer lingual outline than Facial cusp to facial outline
64
Max 2nd Premolar
Which tip is more pointed?
Location of more pointed tip?
Facial cusp
Halfway btwn faciolingual long axis bisector and greatest facial curvature
65
Max 2nd Premolar
Which cusp more rounded?
Location of cusp?
Lingual
Closer to lingual side
(closer to vertical line marking the greatest lingual curvature than it is to the faciolingual long axis bisector)
66
What tooth has an Oval crown outline in a rectangular occlusal table and a "balanced" or symmetrical look from the occlusal aspect?
Max 2nd Premolar
67
Mb 1st Premolar
| Describe lingual cusp tip (2 things)
Pointed
| Centered
68
Mb 1st Premolar
Distinct and consistent ______ groove is present on all specimens
Where are the consistent horizontal depressions located?
Mesiolingual
Mesiolingual/Distolingual
69
Mb 1st Molar
Describe the triangular ridge of the facial cusp
Describe the triangular ridge of the lingual cusp
Very long
Very short
70
T/F
| The triangular ridges of the Mb 1st Molar form one Transverse Ridge
True
71
Describe the occlusal aspect of the Mb 2nd Premolar
Nearly square
| Little Lingual convergence
72
Large to small, name the cusps of the Mb 2nd Premolar:
Facial
Mesiolingual
Distolingual
73
From the Mesial view, how does the Mb 1st Premolar compare to the Mb 2nd Premolar?
Mesial Marginal Ridge inclined
Mesiolingual groove present
Mesiolingual cervical depression (on crown)
Surface Depression (on root)
*same # Roots
74
Max 1M
| Mesiolingual cusp takes up _____ total mesiodistal measurement and the distolingual cusp takes up ____.
60%
| 40%
75
Max 1M
Why is the distal half narrower?
What surface can be seen because of this?
Facial cervical ridge flattens distally
Facial
76
Max 1M
| Cusp sizes larges to smallest
```
Mesiolingual
Mesiofacial
Distolingual
Distofacial
5th
```
77
Max 2M
Obtuse line angles
Acute line angles
Mesiolingual and Distofacial (obtuse)
Distolingual and Mesiofacial (acute)
78
Max 2M
| What is the most facially and mesially placed cusp?
Mesiofacial
79
Max 2M
| What is the most lingually and distally placed cusp?
Distolingual
80
Max 2M
Triangular Ridge of the Distofacial cusp and the Distal Cuspal Ridge of the mesiolingual cusp meet _____ to the _____ than on the Max1M
Closer
Central Pit
81
Max 3M
| Cusps largest to smallest
Mesiofacial
Mesiolingual
Distofacial
Distolingual
82
```
Mb 1M
There are 2 Facial Grooves, which one is shorter?
Where does the shorter one terminate?
What is at the terminus?
Containing?
```
Mesiofacial
Halfway to cervical line
Slight depression (lateral)
Facial (buccal) Pit
83
Mb 1M
Distofacial groove extends onto _____ area on the ____ of the surface _____ to the cervical ridge. It ____ ends in a pit but may be fissured.
Flattened
Middle one third
Distal
Rarely
84
Mb 1M
| The angulation of the triangular ridge of the ____ cusp is ____ to the marginal ridge
Mesiofacial
Almost Parallel
85
Mb 1M
| Triangualr ridge of the mesiolingual cusp is _____ degrees in relation to the mesial marginal ridge
30 degrees
86
Mb 1M
What exclusively makes up the distal contact area?
Relation to the faciolingual vertical bisector of the crown.
Distal Cusp
Slightly facial to
87
Mb 1M
The distofacial cusp is _____ to the distal cusp tip
(distal aspect)
Facial
88
Mb 1M - Occlusal aspect
How many developmental grooves?
What are they?
4
Central
Mesiofacial
Distofacial
Lingual
89
Mb 1M - Occlusal
| Describe how the Central Groove runs across the tooth
Mesiodistally
| Irregular
90
Mb 1M - Occlusal
| Distofacial groove extends _____ at the ____ part of the sulcus
Distofacially
Deepest
91
Mb 1M - Occlusal
| The lingual groove starts at the central pit and travels ______ over to the lingual surface
Minimally
92
Mb 2M - Occlusal
Shape of crown outline:
Converging:
Shape of occlusal table:
truncated Rectangle
Distally
Rectangle
93
Mb 2M - Occlusal
How many major grooves?
What do they form?
3 major grooves
+
94
Mb 2M - Occlusal
| Where is the central pit located?
Lingual half of crown
95
Mb 3M - Occlusal (4 cusp variety)
How many pits?
What are they?
4
Central pit
Facial Pit
Mesial Triangular Pit
Distal Triangular Pit
*No lingual Pit
96
Max 1 PM - Mesial
What is present on all tooth forms?
Describe.
Relatively deep root depression
Increases width occlusally from bifurcation to cervical line
97
Max 1M - Mesial
| Mesial root surface has what 2 concavities?
Trifurcation area
Wide and Shallow on Mesiofacial Root
98
T/F
Max 1M
The mesiofacial root surface depression extends occlusally across the cervical line onto the cervical one-third of the crown
False
99
Mb 1M
| Root trunk measurement on the Facial Aspect
3.0 mm
100
```
Max 1PM
How often are there 2 Canals?
3 Canals?
1 Root?
2 Roots?
3 Roots?
```
83%
2%
23%
75%
2%
101
Max 1M
| Mesiofacial Root, % of 2 or more canals?
59.2%
102
Max 1M
| Distofacial Root, % of 2 or more canals?
1.7%
103
Max 1M
| Lingual Root, % of 1 canal?
99%
104
Max 1M
How often does it have 3 roots?
How often do roots fuse?
95. 9%
| 5. 2%
105
Mb 1M
| Mesial Root, % time 2 or more canals?
95.7%
