Morph Exam 1 midterm lectures 1-7 Flashcards
1
Q
On which surface of the permanent maxillary central incisor does the cervical line exhibit the greatest amount of curvature?
A
mesial
2
Q
Which of the following is the most frequently missing anterior tooth?
A
maxillary lateral incisor
3
Q
How many pulp horns do the maxillary lateral incisors have?
A
2
4
Q
How many pulp horns do the maxillary central incisors have?
A
3
5
Q
Compared to the maxillary central incisor, the lingual fossa of the maxillary lateral incisor is:
A
deeper
6
Q
How does the mesioincisal line angle of the maxillary later incisor compare to the maxillary central incisor?
A
More rounded
7
Q
Which anterior tooth varies in form more than any other tooth?
A
Maxillary lateral incisor
8
Q
When is the eruption of the maxillary lateral incisors?
A
8-9 years
9
Q
What are some features of the maxillary lateral incisor compared to the m. central incisors?
A
- Smaller in all dimensions (except length of root) - More rounded - More pronounced mesial and distal marginal ridges (lingual fossa is deeper) - More often exhibit lingual pits - May have lingual developmental groove
10
Q
What is the geometric form of the m. lateral incisor from the facial view?
A
trapezoidal
11
Q
Where is the mesial height of contour in the maxillary lateral incisor?
A
junction of the middle and incisal 1/3’s
12
Q
Where is the distal height of contour in the maxillary lateral incisor?
A
Middle 1/3 (more rounded distally so it will be higher)
13
Q
Is the labial surface more convex in the maxillary central or maxillary lateral incisor?
A
Maxillary lateral incisor
14
Q
All of the following incisal angles are rounded EXCEPT the:
A
Mesioincisal angle of the Maxillary central incisor
15
Q
According to the universal notation system, tooth #26 is the:
A
Mandibular right lateral incisor
16
Q
Which tooth is 2x as long mesio gingivaly as it is mesio distally?
A
mandibular central incisor
17
Q
What is the only symmetrical tooth in the mouth?
A
mandibular central incisor
18
Q
What are the MI and DI angles of the mandibular central incisor?
A
90 degrees
19
Q
True or false, both contacts of the mandibular central incisor occur at the same level?
A
True Level is incisal 1/3
20
Q
Regarding the mesioincisal and distoincisal angles of the mandibular central incisors:
A
both are right angles
21
Q
The smallest permanent tooth in the mouth is the:
A
mandibular central incisor
22
Q
Which of the following is a characteristic of ALL mandibular incisors?
A
they have marginal ridges on their lingual surface
23
Q
Which of the following permanent incisors has the deepest lingual fossa?
A
Maxillary lateral incisor
24
Q
When does the maxillary central incisor erupt?
A
7-8 years
25
What is the name of the highlighted embrasure? (embrasure superior to maxillary incisors)
Gingival embrasure
26
What is the name of the highlighted embrasure? (embrasure pointing facially/bucally)
facial embrasure
27
When is the first sign of tooth development?
6-7 weeks in utero
28
What is the longest tooth in the maxillary arch?
Maxillary canine
29
How many lobes does the maxillary canine develop from?
4
30
What is the first permanent tooth to erupt?
Mandibular first molar
31
Which anterior tooth is most likely to have a bifurcated root?
mandibular canine
32
In comparison to a mandibular canine, a maxillary canine:
Has a cusp tip that is 1/3 of crown surface
33
Which of the following teeth is broader faciolingually than mesiodistally?
mandibular central incisor
34
Using universal notation, what is the tooth number of the permanent maxillary left 1st molar?
14
35
What tooth number is the maxillary right 1st premolar?
5
36
What tooth number is the maxillary right 2nd premolar?
4
37
What tooth number is the maxillary right canine?
6
38
What tooth number is the maxillary left canine?
11
39
What tooth number is the maxillary left 1st premolar?
12
40
What tooth number is the maxillary left 2nd premolar?
13
41
What tooth number is the maxillary left 1st molar?
14
42
What tooth number is the maxillary right 1st molar?
3
43
What tooth number is the mandibular right 3rd molar?
32
44
What tooth number is maxillary right 2nd molar?
2
45
Which cusp of the pre molar is functional?
Lingual
46
how many lobes do the maxillary pre molars develop from?
4
47
Central development groove
demarcation between buccal and lingual lobes
48
When does the maxillary 1st premolar typically erupt?
10-11 years
49
Traits of first pre molar buccal cusp
- mesial cusp arm is longer and straighter - distal cusp arm is shorter and more curved (opposite of what we saw in canine)
50
Where is the buccal height of contour in the maxillary 1st premolar?
cervical 1/3
51
Where is the mesial contact in the maxillary 1st premolar?
middle 1/3 (offset buccally)
52
Distal contact of the maxillary 1st premolar
-middle 1/3 - broader and more cervically located (compared to mesial)
53
Middle buccal lobe of max. 1st premolar
gives rise to buccal ridge gives rise to buccal cusp
54
When viewed from the buccal, what is the geometric form of the maxillary 1st premolar?
Trapezoid
55
Is the 1st max premolar broader (M-D) lingually or buccally?
-buccally - (crown tapers on lingual side)
56
Lingual cusp trends of max first pre molar
- mesiolingual cusp arm is shorter than distolingual cusp arm (opposite of the buccal cusp)
57
Where is the lingual height of contour in the maxillary first premolar?
middle 1/3
58
how much of the maxillary 1st premolar root is encompassed by the root trunk?
1/2 - 2/3 of root
59
How many pulp horns are found in the permanent maxillary canine?
1
60
Maxillary 2nd premolar buccal cusp trends
-mesial buccal cusp ridge is shorter than the disto buccal cusp ridge (opposite of 1st max premolars) - buccal cusp is not as long
61
Lingual cusp trends of max 2nd premolar
Lingual cusp is longer than lingual cusp of 1st max pre molar
62
Maxillary 2nd premolar Mesial view
-Mesial contact in middle 1/3 (slightly offset buccally) -No mesial marginal ridge developmental ridge - No mesial developmental depression - single tapered root - buccal and lingual cusp are approximately equal in size and shorter than 1st max pre molar
63
heights of contour in maxillary 2nd pre molar?
-lingual is in middle 1/3 - buccal is in cervical 1/3
64
Distal contact of maxillary 2nd pre molar?
-middle 1/3 (offset bucally)
65
True or False? In the maxillary 1st premolar, the mesial cusp arm of the buccal cusp is shorter than the distal cusp arm?
false
66
Which of the following teeth has a root trunk that is 1/2 to 2/3's the length of the root?
Maxillary 1st pre molar
67
Which of the following teeth have crowns that are narrower buccolingually than mesiodistally? Maxillary central incisors Maxillary canines Maxillary 1st premolars Maxillary 2nd premolars
Maxillary central incisors
68
The mesial marginal ridge groove is found in which of the following teeth? Maxillary canines Mandibular canines Maxillary 1st premolars Maxillary 2nd premolars Both maxillary 1st and 2nd premolars
Maxillary 1st premolars
69
69
Identify this tooth
Maxillary first pre molar
70
What tooth number is the madibular left premolar?
21
71
What tooth number is the mandibular left 2nd premolar?
20
72
What tooth number is mandibular right 1st premolar?
28
73
Are the mandibular premolars succedaneous teeth?
Yes, they replace the primary molars
74
How many lobes do the madinular 2nd molars develop from?
4 or 5
75
Is the mesial line of the buccal cusp, longer or shorter than the distal in the mandibular first premolar?
It is shorter (this is opposite of the maxillary first premolar)
76
Where are the heights of contour in the madibular first premolar? (buccal view)
middle 1/3
77
Is the mandiublar premolar wider M-D at the contact point or at the cervix?
At the contac points (crown narrows towards the cervix)
78
The outline of the crowns of all posterior teeth from the facial and lingual views is best described as:
Oval
Rhomboidal
Trapezoidal
Triangular
trapezoidal
79
mesio lingual developmental groove (found in mandibular 1st premolar)
- demarcates the lingual lobe from the mesiobuccal lobe
- seperates mesial marginal ridge from lingual cusp
80
What shape is the 1st mandibular premolar from the mesial view?
rhomboidal
81
Buccal cusp tip of mandibular 1st premolar
-centered over midline of the root
82
What is the buccal height of contour of the mandibular 1st premolar?
At the juncion of the middle and cervicle 1/3
83
Lingual height of contour in mandibular premolar
- lingual to outline of root
- in the middle 1/3
84
True or False in mandibluar 1st premolars: The distance from the CEJ to the lingual cusp tip is 2/3 the distance of the CEJ to the Buccal cusp tip
True
85
The embrasures of posterior teeth are called:
occlusal, gingival, lingual, buccal
86
In the mandibular 1st premolar, which is higher above the cej? The distal marginal ridge or the mesial marginal ridge
The distal marginal ridge
-(only tooth in which the mesial marginal ridge is at a lower level than the distal marginal ridge)
87
Which contact area in the mandibular first pre molar is broader?
- distal or mesial
distal
| (located in the middle 1/3)
88
Occulsal view of the mandiublar first pre molar
- diamond outline
- buccal cusp and buccal ridge are pronounced
- lingual cusp is small
**-mesiobuccal cusp ridge is shorter than the distobuccal cusp ridge**
89
Mandibular first molar width
-Wider (M-D) in the buccal than it is the lingual
90
Transverse ridge
present in mandibular 1st premolar
- formed from the buccal triangular ridge and lingual triangular ridge
- seperates occlusal fossa
91
is the mesial or distal triangular fossa larger in mandiublar 1st premolar?
distal
92
In the mandibular first premolar, which groove separates the mesial marginal ridge from the lingual cusp?
mesiolingual groove
93
There are two types of mandibular 2nd pre molars
- 3 cusp type (5 lobes)
- 2 cusp type (4 lobes)
94
Buccal cusp of 2nd mandibular pre molar
-shorter and less pointed than first
95
Are the Lingual lobes better developed in the 1st or 2nd mandibular pre molars?
2nd
96
What seperates the two lingual cusps on a 3 cusped mandibular 2nd premolar?
the lingual groove
97
How does the mandibular 2nd molar differ from the mandibular 1st molar?
- Crown and root are wider buccolingualy
- Buccal cusp tip is not as lingually placed
- Buccal cusp tip is shorter
- Lingual and Buccal cusps are more equal in size
- Mesial marginal ridge is at right angle to the long axis of the tooth
- No mesialingual developmental groove
- Root is longer and the apex is more blunt
98
When viewed from the mesial aspect, the position of the buccal cusp tip of the mandibular 1st premolar is:
centered over the midline of the tooth
99
Occlusal view of 3 cusp mandibular 2nd molar
- square in shape
- two lingual cusps
- one buccal cusp
Buccal\> mesolingual \> distolingual
100
Three cusp type
- developmental grooves seperate the cusps forming a Y shape on occlusal surface (mesial, distal, and lingual developmental grooves)
- Central pit
- Mesial triangular fossa and distal triangular fossa
101
Two cusp type (mandibular 2nd molar)
| (occlusal view)
- H or U developmental grooves
- Outline is rounded
- lingual convergence of the mesial and distal marginal ridges
- H shape more common
- Lingual cusp well developed
- mesial and distal fossa
- Central develop mental groove
\_ may or may not have grooves
102
Overview of Mandibular 2nd premolars
103
The premolar with the occlusal groove pattern that may simulate the letter "Y" is the:
mandibular 2nd premolar
104
Which of the following premolars often has two roots?
Maxillary 1st premolar
105
What are the tooth numbers of the central incisors?
Maxillary (8,9)
Mandiublar (24,25)
106
What are the tooth numbers of the lateral incisors?
Maxillary (7,10)
Mandibular (23,26)
107
What are the tooth numbers of the canines?
Maxillary (6, 11)
Mandibular (22, 27)
108
What are the tooth numbers of the premolars?
Maxillary (4,5, 12,13)
Mandibular (20,21, 28,29)
109
What tooth number are the molars?
Maxillary (1,2,3, 14,15,16)
Mandibular (17,18,19, 30,31,32)
110
When is the first sign of tooth development?
6-7 weeks in utero
111
When do deciduous teeth begin to calcify?
13-20 weeks in utero
112
When do decidous teeth complete calcification?
18-20 weeks in utero
113
When do decidous teeth starts to erupt?
6-30 months
114
Eruption
emergence into the. oral cavity
115
Exfoliation
loss of a deciduos tooth
116
How many pre molars are in decidous teeth?
0
117
Deciduous dentition
Only when deciduous teeth are in the mouth (up to 6 years of age)
118
Mixed dentition
Mixture of permanent and decidous teeth
119
Non-succedaneous teeth
Do not replace primary dentition
120
Is the apex of the root in the maxillary central incisor slightly distal or mesial to the long axis of the tooth?
distal
121
The root of #8/9 is longer than the crown? T/F
true
122
What has the greatest amount of curviture of any tooth in the mouth?
The mesial cervical line of the maxillary central incisors
123
The shape of the maxillary central incisor when viewed from the mesial is best described as:
triangular
124
Embrasure trends
125
Mandibular central incisor cej
- extends one mm longer apically on lingual than labial
- curves 1 mm less on distal than mesial
126
In which premolar is the mesial marginal ridge at a lower level than the distal marginal ridge?
- mandibular 1st pre molar
127
Which pre molar may have a lingual developmental groove?
- mandibular 2nd pre molar (3 cusp y shaped type)
128
Which of the following premolars most frequently has only one pulp horn?
- mandibular 1st pre molar
129
1 of 1
close
In which of the following premolars is the mesial cusp ridge of the buccal cusp longer than the distal cusp ridge of the buccal?
- maxillary 1st premolar
130
how many cusps are in the mandibular 1st molar?
- 5
131
how many cusps are in the mandibular second molar?
- 4
132
