Posterior Teeth Identification Flashcards
1
Q
What is a fossa?
A
A shallow depression
2
Q
Three types of fossas found on some posterior teeth
A
Circular fossa
Triangular fossa
Irregular fossa
3
Q
What is a circular fossa?
A
A rounded depression
4
Q
What is a triangular fossa?
A
A v-shaped depression
5
Q
What is an irregular fossa?
A
A depression without a definite shape
6
Q
What is a ridge on a tooth?
A
A linear elevation, named by its location or direction
7
Q
What type of ridge may you find on a posterior tooth?
A
Marginal ridge
Oblique ridge
Transverse ridge
Triangular ridge
8
Q
What is a marginal ridge in posterior teeth?
A
a ridge around the perimeter of the occlusal surface
9
Q
What is an oblique ridge?
A
a ridge that diagonally crosses the occlusal surface
10
Q
What is a transverse ridge?
A
a ridge that crosses the occlusal surface from buccal to lingual
11
Q
What is a triangular ridge?
A
a ridge that slants from the cusp tip toward a groove and forms a triangular slope
12
Q
What is a groove?
A
A linear depression
13
Q
Each posterior tooth has a _____unique to that tooth
A
primary groove pattern
14
Q
What is a pit?
A
A pinpoint depression
15
Q
What is a furcation?
A
the area on a root where it separates (forks or splits)
16
Q
What is a bifurcation?
A
where a root divides into 2
17
Q
What is a trifurcation?
A
where a root divides into 3
18
Q
What are pulp horns?
A
portion of the pulp chamber that is elevated toward a cusp
19
Q
What are pulp canals?
A
portion of the pulp located in the roots) of the tooth
20
Q
Crown of each of these tooth has an occlusal surface
A
Posterior teeth
21
Q
Occlusal surface of posterior teeth are bordered by
A
raised marginal ridges located on both mesial and distal surfaces
22
Q
Occlusal surface of posterior teeth have how many cusps?
A
2 or more cusps
23
Q
Posterior teeth have____ on the occlusal surface that mark the junction among developmental lobes
A
developmental grooves
24
Q
branch from the developmental grooves
These grooves are not always present in the same pattern on the occlusal of each different tooth type
A
Supplemental grooves
25
What is the buccal height of contour for posterior permanent teeth?
Cervical third
26
What is the lingual height of contour for posterior teeth?
Middle third
27
the area where crowns of adjacent teeth in the same arch physically touch each other
The area of resistance when flossing between two teeth
Contact area
28
Posterior teeth have a____ contact area than anterior teeth
wider
29
Posterior teeth have a____ contact area than anterior teeth
wider
30
Contact area of posterior teeth is located to the
buccal of center
31
From a proximal (side) view, the curvature of the CEJ of posterior teeth is less or more pronounced than that of anterior teeth?
Less pronounced
32
There are how many posterior teeth in a primary dentition?
20
33
How many premolars are in a permanent dentition?
8
34
How many first premolars are in a permanent dentition?
4
35
How many second premolars are in a permanent dentition?
4
36
What are the two types of premolars?
1st and 2nd
37
How many molars are in a permanent dentition?
12
38
What are the three types of molars?
First second and third
39
How many first molars are in a permanent dentition?
4
40
How many second molars are in a permanent dentition?
4
41
How many third molars are in a permanent dentition?
4
42
The 8 most anteriorly placed posterior teeth in the permanent dentition
Premolars
43
How many first premolar and second premolars are present in each quadrant?
One of each
44
Permanent premolars are succedaneous; because they
replace the primary molars
45
These teeth assist the canines in tearing food, as well as assisting the molars with grinding food
Premolars
46
These teeth assist the canines in tearing food, as well as assisting the molars with grinding food
Premolars
47
These teeth in addition to the anterior teeth also help maintain the vertical dimension of the face, support the facial muscles (especially the muscles in the corners of the mouth)
Premolars
48
Premolars may all have what types of structures?
• cusps
• marginal ridges
• triangular ridges
• developmental grooves
• occlusal pits
49
Premolars have a shorter or longer crown than anterior teeth?
Shorter
50
Premolar buccal surface is ______ and has a prominent, centrally located _____.
Rounded; buccal ridge
51
Most premolars have how many roots?
Most of them have one except for the maxillary first premolars which have two
52
All premolars have:
Proximal root concavities
53
How many maxillary premolars are there?
4 maxillary premolars
54
What are the two types of maxillary premolars?
1st and 2nd premolars
55
How many premolars are in each quadrant?
2; one first premolar and one second premolar
56
Do the maxillary first premolars resemble each other?
Yes
57
A maxillary first premolar is larger or smaller than a maxillary second premolar?
Larger
58
Which erupt earlier? The mandibular premolars or the maxillary premolars?
Maxillary premolars
59
The crown of a maxillary premolar is _______from cervical to occlusal than the maxillary canine, but are ____ than the maxillary molars.
Shorter; longer
60
The maxillary premolars crown is ______over the root.
Centered
61
Do the crowns of the maxillary premolars show lingual inclination?
No
62
Both maxillary premolars have two cusps of almost ______size.
Equal
63
Roots of maxillary premolars have slight ___________inclination
Lingual and distal inclination
64
What are the universal teeth numbers for the maxillary first premolars?
5 and 12
65
What is the eruption date for the maxillary first premolars?
10-11 years old
66
When is the first evidence of calcification for maxillary first premolars?
1.5 years old
67
When is crown completion for maxillary first premolars?
5-6 years old
68
When is root completion for maxillary first premolars?
12-13 years old
69
Maxillary first premolars develop from how many developmental lobes?
4
70
Roots of maxillary first premolar are____, dividing into two roots (buccal and lingual) that are only seen from the proximal view
bifurcated
71
How many cusps do maxillary 1st premolars have? Where are the cusps?
Two cusps - one buccal, one lingual
72
How many roots do maxillary first premolars have?
Two roots - one buccal, one lingual
73
How many pulp canals do the roots of the maxillary premolars have?
Two pulp canals. One in each root
74
The maxillary premolars resemble canines but length wise they are ____
Shorter
75
From the proximal view, near the occlusal mesial marginal ridge, the maxillary first premolars will have a groove called ___
Mesial marginal groove
76
From the CEJ to the furcation, the maxillary first premolars will have a
Mesial root depression
77
Do maxillary first premolars have distal marginal ridges or a depression at the cervical portion of the crown?
No. Only the mesial proximal side has a marginal groove and a depression from the CEJ to the furcation
78
The two cusps of the maxillary first premolars are ___ defined
sharply
79
The buccal cusp of a maxillary first premolar is usually about how much higher than the lingual cusp?
1 mm
80
What shape are the maxillary first premolar crowns?
The crown has an angular shape with sharp outlines
81
_______is widest mesiodistally of all the premolars
Crown of maxillary first premolar
82
Maxillary first premolar crown is wide at______, becoming narrower at the______ (similar to the maxillary canine)
the level of the contact areas; CEJ
83
On the buccal surface of maxillary first premolars, there is a ________that is centrally located.
Prominent buccal ridge
84
The buccal cusp for maxillary first premolars is sharp and ___
Pointed
85
What is the shape of the maxillary first premolar mesially?
Concave from cervix to contact area ( middle third)
86
What is the mesial contact area for a maxillary first premolar?
Middle third
87
What does the mesial cusp slope look like for a maxillary first premolar?
Straighter and longer than the distal
88
The only tooth in the permanent dentition that has a buccal cusp with the mesial cusp slope longer than the distal cusp slope, which helps to distinguish the right from the left
Maxillary first premolar
89
From the buccal view, only the ____root is visible in a maxillary first premolar.
Buccal
90
Do maxillary first premolars have imbrication lines and perikymata?
Yes
91
Where are the imbrication lines and perikymata on a maxillary first premolar?
Imbrication lines and perikymata present at the cervical third
92
From a lingual view of maxillary first premolar, are both cusp visible?
Yes
93
The lingual cusp of a maxillary first premolar is ______ than buccal cusp, and not as sharp
Shorter, smoother and more narrow
94
From a proximal view, are both cusps of a maxillary first premolar visible?
Yes
95
From the proximal view, are both roots of maxillary first premolar visible?
Yes
96
For the maxillary first premolars, the cusps are in line with the
Roots
97
From a buccal view of maxillary first premolar, are both cusp visible?
No. Only buccal cusp is visible
98
For a maxillary first premolar, if viewed from the proximal surface, the bifurcated roots are ____, then from there _____.
Straight until the apical third; towards each other
99
If viewed from proximal surface, The maxillary first premolars roots bifurcate for ___
one-half of its length with a deep mesial interradicular groove
100
If view from proximal surface, the CEJ of the maxillary first premolars have a deeper curve on the
mesial
101
If viewed from the occlusal surface, the maxillary first premolars shape of the crown is
Hexagonal
102
From the occlusal surface, are the buccal and lingual cusps and surfaces of the maxillary first premolar visible?
Yes
103
Why can we see the buccal and lingual surfaces on the occlusal view of a maxillary first premolar?
The cusps curve inwards
104
From an occlusal view, we can see that the buccal cusp of maxillary first premolars are centered between ____
Mesial and distal side
105
When viewed from the occlusal surface, is the lingual cusp ridge of buccal cusp (buccal triangular ridge) present on a maxillary first premolar?
Yes
106
When the maxillary first premolar is viewed from the occlusal surface, we can see that the lingual cusp is offset to the ____
mesial
107
When the maxillary first premolar is viewed from the occlusal surface, we can see that the____shaped fossae are present mesially and distally
Triangular
108
When viewed from the occlusal surface, do the maxillary first premolars have supplemental grooves?
Yes. They have several.
109
When the maxillary first premolar is viewed from the occlusal surface, it is common to find a ___ where two grooves converge
Pit
110
When the maxillary first premolar is viewed from the occlusal surface, it is common to find a ___ where two grooves converge
Pits
111
When the maxillary first premolar is viewed from the occlusal surface, it is common for it to have ______pits.
Mesial and distal
112
What are the teeth numbers for the maxillary second premolars in the Universal Numbering System?
4 and 13
113
What is the Eruption date for Maxillary second premolars?
10-12 years old
114
When is the First evidence of calcification in maxillary second premolars?
2 years old
115
When is Crown completion in maxillary second premolars?
6-7 years old
116
When is root completion in maxillary second premolars?
12-14 years old
117
Maxillary first premolars are the succedaneous replacements for the
primary 1st molars
118
Maxillary second premolars are succedaneous replacements for
Primary 2nd molars
119
Maxillary second premolars develop from how many developmental lobes?
4
120
Maxillary second premolars have how many cusps?
2
121
Each maxillary second premolar has 2 cusps. What type of cusps are they?
Buccal and lingual cusps
122
How many roots does a maxillary second premolar have?
One with either one or two pulp canals
123
In maxillary second premolars, the mesial slope is ___than the distal slope.
Shorter
124
What is the length of the cusps of maxillary second premolars to each other?
Both cusps are about the same length (lingual is slightly shorter, but not as significantly as the lingual cusp of the max. first premolar)
125
Do maxillary second premolar crowns have mesial marginal grooves and depressions on CEJ when viewed from proximal?
No. No mesial marginal grooves and no concavity in crown at CEJ. However sometimes from occlusal view, there might be a mesial marginal groove BUT it rarely extends onto the mesial surface
126
In maxillary second premolars, when viewed from proximal, a shallow ____ is evident on the mesial surface.
Depression
127
When viewed from the buccal view, the maxillary second premolars, Buccal cusp is_______ as that of a maxillary first premolar
neither as long nor as sharp
128
When viewed from the buccal view, the maxillary second premolars, Buccal cusp is_______ as that of a maxillary first premolar
neither as long nor as sharp
129
When viewed from the buccal view, the maxillary second premolars, locater centerally is a
Prominent buccal ridge
130
When viewed from the buccal view, the maxillary second premolars’ mesial side shape is
concave from cervix to contact area
131
When viewed from the buccal view, the maxillary second premolars contact area is
Middle third
132
When viewed from the buccal view, the maxillary second premolars cusp slopes mesially and distally are
Distal cusp slope is longer than the mesial cusp slope
133
When viewed from a lingual view, are the maxillary second premolars cusps both visible?
Yes but more difficult to see the buccal cusp due to lingual cusp not being as short as that of a maxillary first premolar
134
When viewing the lingual cusp from the lingual surface of a maxillary second premolar, we would see that the cusp is
Smooth and almost the same height as the buccal cusp.
135
In maxillary first and second premolars on the lingual surface, are both distal and mesial surfaces visible?
Yes
136
Like the maxillary first premolar, the maxillary second premolar when viewed from the lingual and occlusal surfaces’ the lingual cusp is _____ displaced
Slightly Mesially
137
From the proximal view, are the two cusps on the maxillary second premolars visible?
Yes
138
For maxillary second premolars, does the distal view show grooves and depressions on distal crown
No
139
When viewed proximally, the maxillary second premolar CEJ has a slightly deeper curve on the
mesial
140
When viewed from the occlusal view, the shape of a maxillary second premolar crown is slightly more ______ than that of a maxillary first premolar.
Rounded
141
When viewed from the occlusal view, the shape of a maxillary second premolar crown is slightly more rounded than that of a maxillary first premolar. Its is also slightly ____ which is more difficult to see than on a maxillary 1st premolar.
Hexagonal
142
When viewed from the occlusal view, the buccal cusp of a maxillary second premolar crown is ______ and the lingual cusp is_____.
Centered between mesial and distal side
Offset to the mesial
143
When viewed from the occlusal view, the buccal cusp of a maxillary second premolar crown is ______ and the lingual cusp is_____.
Centered between mesial and distal side
Offset to the mesial
144
The maxillary second premolars have more or less supplemental grooves than maxillary first premolars.
More supplemental grooves
145
On maxillary second premolars, when viewed from occlusal, it is common to find ___where two or more grooves converge
Mesial and distal pits
146
On maxillary second premolars, when viewed from occlusal, it is common to find ___where two or more grooves converge
Mesial and distal pits
147
How many mandibular premolars are there?
4 mandibular premolars
148
What are the two types of mandibular premolars?
1st and 2nd premolars
149
How many mandibular premolars are in each quad?
2. 1 of each type.
150
Mandibular premolars have how many cusps?
Two. But mandibular second premolars can have three 55% of the time
151
What are the two types of cusps that two cusped mandibular second premolars have?
Buccal and lingual
152
Mandibular premolars typically have how many roots?
One
153
Do mandibular premolars resemble each other?
No
154
Mandibular first premolar is typically smaller or larger than mandibular second premolar?
Smaller
155
Mandibular first premolar is typically smaller or larger than mandibular second premolar?
Smaller
156
The buccal outline of the crown on all mandibular premolars shows a strong _____when viewed from the proximal
lingual inclination
157
Mesial and distal contact areas of mandibular premolars are
on nearly the same level. Both have a contact area at middle third
158
For mandibular premolars, similar CEJ curvatures are found on
Both premolars
159
Mandibular premolars have a much larger or small buccal cusp than lingual cusp?
Larger
160
The roots of mandibular premolars have _____inclination
Slightly distal
161
Why are the roots of mandibular canines only have distal inclination and not lingual and distal inclination like the maxillary canines?
For the purpose of occlusion, the maxillary arch must cover or hang over mandibular arch
162
What are the teeth numbers for the mandibular first premolars?
21 and 28
163
What is the eruption date for the mandibular first premolars?
10-12 years old
164
When is the First evidence of calcification for mandibular first premolars?
1.25-2 years old
165
When is crown completion for mandibular first premolars?
5-6 years old
166
When is Root completion for mandibular first premolars?
12-13 years old
167
Permanent mandibular first premolars replace the
Primary first molars
168
Permanent mandibular second premolars replace
Primary 2nd molars
169
Mandibular first premolars develop from how many developmental lobes?
4 developmental lobes
170
Mandibular first premolars resemble a mandibular canine in some ways but its size for one is ___ overall than a canine
Smaller
171
Mandibular first premolars have how many roots?
Usually one but sometimes tends to bifurcate at the apex
172
Mandibular first premolars have how many cusps?
Two
173
What type of cusps do mandibular first premolars have?
Buccal and lingual cusps
174
The buccal cusp of mandibular first premolars is
Long and sharp
175
How many cusps of the mandibular first premolar are functional?
One
176
Which cusps of the mandibular first premolars are functional in occlusion?
The buccal cusp is the only functional cusp in occlusion for this tooth
177
The lingual cusp of mandibular first premolars are
usually small and nonfunctioning
178
Mandibular first premolar roots are _____ than mandibular second premolar roots
Smaller and shorter
179
The buccal aspect of root of mandibular first premolars is more
Rounded/conical
180
The lingual aspect of root of mandibular first premolar is more wide or tapered?
Tapered
181
On the lingual non functioning cusp on the mandibular first premolar towards the mesial marginal ridge, you will find
A mesiolingual groove
182
On mandibular first premolars, you may find this on the distal root surface.
A deep groove
183
At the buccal view, mandibular first premolars have this centrally located structure
A prominent buccal ridge
184
The buccal cusp shape of mandibular first premolars from a buccal view is
Pointed
185
The buccal cusp shape of mandibular first premolars from a buccal view is
Pointed
186
The cervix of a mandibular first premolar is
Narrow
187
From the buccal view, we can see that a mandibular first premolar sometimes curves
Distally
188
From the buccal view, we can see that a mandibular first premolar sometimes curves
Distally
189
From the buccal view, what is the shape of the mesial side of a mandibular first premolar?
Concave from cervix to the contact area
190
From the buccal view, what is the shape of the mesial side of a mandibular first premolar?
Concave from cervix to the contact area
191
From a buccal view, Where is the contact area for mandibular first premolars?
Middle third
192
From a buccal view, what is the shape of the distal side of a mandibular first premolar?
Concave from the cervix to contact area
193
From a buccal view, what is the shape of the distal side of a mandibular first premolar?
Concave from the cervix to contact area
194
The mandibular first premolar mesial cusp slope is ____ than the distal cusp slope
shorter
195
Where is the contact area on the distal side of mandibular first premolars?
Middle third
196
Where is the contact area on the distal side of mandibular first premolars?
Middle third
197
On the buccal view of mandibular first premolars, the distal cusp slope is____ than the mesial cusp slope
longer
198
From a lingual view, the lingual surface of mandibular first premolar is much___ than the buccal, with crown tapering to the____
narrower; lingual
199
From a lingual view of a mandibular first premolar, can the mesial and distal surfaces can be seen from this view?
Yes
200
From a lingual view of a mandibular first premolar, can the mesial and distal surfaces can be seen from this view?
Yes
201
The mandibular first premolar has a short lingual cusp that is ___the height of the crown.
2/3
202
From a lingual view on the mandibular first premolar, the _____delineates the lingual cusp
Mesiolingual groove
203
From a lingual view on the mandibular first premolar, the _____delineates the lingual cusp
Mesiolingual groove
204
From a proximal view of the mandibular first premolars, are both cusps visible?
Yes
205
From a proximal view, the buccal cusp of a mandibular first premolar is centered over
The root
206
From a proximal view, the buccal cusp of a mandibular first premolar is centered over
The root
207
From the proximal view of a mandibular first premolar, is the occlusal surface visible?
Yes
208
From the proximal view of a mandibular first premolar, is the occlusal surface visible?
Yes
209
From the proximal view of a mandibular first premolar, is the occlusal surface visible?
Yes
210
From a proximal view of mandibular first premolars, the mesiolingual groove interrupts
The mesiomarginal ridge with deep developmental groove (mesial view)
211
From a proximal view of mandibular first premolar, there is a _____in cervical line from mesial aspect
slight curve
212
From a proximal view, mandibular first premolars have___ root with a ____ at the apical third
broad; deep developmental groove
213
From a proximal view, the cervical line on the distal of mandibular first premolars is
Straight
214
From a proximal view, the mandibular first premolars have a concavity near the _____from the distal aspect
Cervical line of the crown
215
From the occlusal view: is a mandibular first premolar’s buccal surface visible?
Yes
216
From the occlusal view: is a mandibular first premolar’s buccal surface visible?
Yes
217
On the occlusal surface, mandibular first premolars have two irregular ___
Fossae
218
What two irregular fossae are present on the occlusal surface of mandibular first premolars?
Mesial and distal fossae
219
What two irregular fossae are present on the occlusal surface of mandibular first premolars?
Mesial and distal fossae
220
On the occlusal surface of mandibular first premolars, there is a ____ that runs from the labial to the lingual surface on the occlusal surface
Prominent Transverse ridge
221
From the occlusal, the crown outline of the mandibular first premolars is
Diamond shaped with a notch on the mesial outline at the mesiolingual groove
222
What are the teeth numbers for the mandibular second premolars in the universal numbering system?
20 and 29
223
What is the eruption date for mandibular 2nd pre-molars ?
11-12 years old
224
When is first evidence of calcification for mandibular second premolars?
2.5 years old
225
When is crown completion for mandibular 2nd pre-molars?
6-7 years old
226
When is root completion for mandibular 2nd pre-molars?
13-14 years old
227
The mandibular 2nd pre-molars replace the
primary second molars
228
The mandibular second premolar is composed of how many developmental lobes?
4
229
How many roots does a mandibular 2nd pre-molar have ?
One
230
How many pulp canals does a mandibular 2nd pre-molar have?
One pulp canal
231
A mandibular second premolar root is ______than the root of a mandibular first pre-molar.
larger and longer
232
What are the two forms of mandibular 2nd pre-molars?
3 cusps mandibular second premolars and 2 cusps mandibular second premolar
233
A three cusped mandibular 2nd pre-molar occurs____ of the time.
55%
234
A two cusps mandibular second premolar occurs ____of the time
45%
235
What are the names of the three cusps for a three cusped mandibular second premolar?
Buccal cusp
Mesiolingual cusp
Distolingual cusp
236
What are the names of the two cusps for a two cusped mandibular second premolar?
Buccal and lingual cusps
237
The buccal cusp of a mandibular second premolar is _____ but shorter than mandibular first premolar.
Long and sharp
238
The two types of mandibular second premolars differ mainly in their______ but other surface features are similar to each other.
occlusal features
239
Do mandibular 2nd pre-molars have pronounced proximal root concavities?
Yes
240
From the buckle view, a mandibular second premolar resembles mandibular first premolar, but instead is
slightly shorter and broader.
241
Mandibular second pre-molars have a____ buccal cusp then a mandibular first premolar.
shorter
242
The slopes of the buccal cusp of the mandibular 2nd pre-molar are more
rounded
243
From the buccal view, a mandibular second premolar contact areas are in the ____of the tooth
Middle third
244
The contact areas of the mandibular second premolars are slightly more____ than the mandibular first pre-molar
occlusal
245
Mandibular second premolar from the buccal view the roots tends to curve
distally
246
From the lingual view mandibular 2nd pre-molars lingual cusps are_____ than the mandibular first premolar
longer
247
From the lingual view of a three cusped mandibular second premolar, the mesial lingual cusp is _______than the distal lingual cusp
longer and wider
248
From the lingual view of the mandibular second premolars, there is a developmental groove that separates the mesial lingual and distal lingual cusp. This groove is _____to the midline of the tooth.
distal
249
From the lingual view of a mandibular second premolar with two cusps, the single lingual cusp has how many developmental grooves?
None
250
From the proximal view, are the mandibular 2nd pre-molars cusps both visible?
Yes
251
From the proximal view of a mandibular 2nd pre-molar the buccal cusp is______ than a mandibular first pre-molar.
shorter and more buccal (not as lingual)
252
From the proximal view of a mandibular 2nd pre-molar there is a deep distal root depression in the
middle third of the root.
253
From the proximal view of a mandibular 2nd pre-molar there is a deep distal root depression in the ___of the root.
middle third
254
From proximal view of a mandibular 2nd pre-molar is there a mesial depression in the root?
No
255
From proximal view of the mandibular 2nd pre-molars there is a slight curve in the_____ from mesial aspect
cervical line
256
From a proximal view of the mandibular 2nd pre-molars the cervical line on the distal aspect is
straight
257
From the proximal view of the mandibular second premolars, you can typically see more of the occlusal surface from the
distal proximal view.
258
From an occlusal view of a mandibular second premolar in both two cusp and three cusped types, the buccal cusp is____ to each other
similar
259
From the occlusal view of a mandibular second premolar three cusped type these cusps are separated by two
developmental grooves
260
What are the two types of developmental grooves in three cusp type mandibular second premolars when looking at the occlusal view?
V-shaped central groove and linear lingual groove
261
The V-shaped, central groove and linear lingual groove of a three cusp type mandibular second premolar together form a distinctive____ shaped groove pattern
Y
262
A____ is located at the junction of the central groove and lingual groove in three cusp type mandibular 2nd pre-molars when viewed from the occlusal view
distal to center pit
263
When comparing the two cusp and three cusp type mandibular second pre-molars on both types the buccal cusp is____.
similar
264
On the occlusal view of a mandibular 2nd pre-molar with two cusps, there is a____ groove.
central
265
The central grooves on a two cusp type mandibular second premolar can have what two patterns?
U shaped and H shaped
266
From the occlusal view of mandibular second premolars, there could be___ at the ends of the central groove
Mesial and distal pits
267
Mandibular second premolars are commonly involved in what type of congenital condition?
Partial anodontia
268
Permanent molars are the most____ placed teeth in the permanent dentition
posteriorly
269
Permanent molars are distal or mesial to the premolars
Distal
270
Permanent molars are the Largest or smallest teeth in the dentition.
Largest
271
How many molars in each quad?
3 molars in each quadrant
272
How many types of molars?
3 types of molars
273
What are the three types of molars?
* First molars ("6 year molars")
* Second molars ("12 year molars")
* Third molars ("wisdom teeth")
274
What is the principal function of the molars?
grinding
275
Permanent molars are succedaneous or nonsuccedaneous?
nonsuccedaneous
276
Permanent molars are succedaneous or nonsuccedaneous?
nonsuccedaneous
277
Why are molars non succedaneous?
They do not replace any primary teeth
278
Molars have___ occlusal surfaces with___ cusps.
wide; prominent
279
Molars support ____and assist canines and premolars with maintaining
The soft tissue of the cheek, especially the facial muscles; vertical dimension of the face
280
__are the largest molars overall
First molars
281
Second and third molars are progressively smaller or larger?
Smaller
282
Each molar's buccal surface has a prominent cervical ridge in the ___ running mesiodistally.
cervical third of the tooth
283
Molars have an occlusal surface with usually how many cusps?
3 or more cusps
284
2 of molar cusps on buccal side are
buccal cusps
285
Occlusal surface of molars are bordered by
cusp ridges and marginal ridges
286
Grooves and pits on molars are located on
the occlusal surfaces, Lingual surfaces of some maxillary molars, Buccal surfaces of some mandibular molars
287
Molars are multirooted or single rooted?
Multirooted
288
Maxillary molars usually have how many roots?
three roots (trifurcated)
289
Mandibular molars usually have how many roots?
two roots (bifurcated)
290
___are overall the largest and strongest teeth of the maxillary arch
Permanent Maxillary molars
291
___are overall the largest and strongest teeth of the maxillary arch
Permanent Maxillary molars
292
___are overall the largest and strongest teeth of the maxillary arch
Permanent Maxillary molars
293
Maxillary molars are____ buccolingually than mesiodistally
wider
294
Maxillary molars are___ in shape from an occlusal view, and____ in shape from a proximal view
rhomboidal; trapezoidal
295
Crowns of maxillary molars are centered over the ____, with___inclination
root; no lingual
296
Crowns of maxillary molars are centered over the ____, with___inclination
root; no lingual
297
Maxillary molars usually have___ major cusps.
4
298
What ridge is a feature unique to maxillary molars (except for maxillary third molars) ?
An oblique ridge
299
What ridge is a feature unique to maxillary molars (except for maxillary third molars) ?
An oblique ridge
300
Maxillary molars usually have___ roots.
3; trifurcated
301
Maxillary molars roots converge as you move
posteriorly
302
What are the tooth numbers for the maxillary first molars in the Universal Numbering System?
3 and 14
303
When is the Eruption Date for maxillary first molars?
6-7 years old
304
When is the Eruption Date for maxillary first molars?
6-7 years old
305
When is the First evidence of calcification of maxillary first molars?
Birth
306
When is crown completion for maxillary first molars?
2.5-3 years old
307
When is crown completion for maxillary first molars?
2.5-3 years old
308
When is Root completion for maxillary first molars?
9-10 years old
309
Maxillary first molars can sometimes erupt___ the mandibular central incisors
before
310
Maxillary first molars erupt___ to the maxillary second premolars
distal
311
How are maxillary first molars nonsuccedaneous?
They do not replace any primary teeth
312
Maxillary first molars are composed of___developmental lobes.
5
313
What is the largest tooth in the maxillary arch?
Maxillary first molars
314
Which tooth has the largest crown in the permanent dentition?
Maxillary first molars
315
Which tooth has the largest crown in the permanent dentition?
Maxillary first molars
316
Least variable crown form for all maxillary molars
Maxillary first molars
317
From an occlusal view, maxillary first molars are ___in shape
rhomboidal
318
How many functional cusps do maxillary first molars have?
4 functional cusps
319
What are the 4 functional cusps of the maxillary first molars?
* Mesiobuccal
* Distobuccal
* Distolingual
* Mesiolingual
320
What are the 4 functional cusps of the maxillary first molars?
* Mesiobuccal
* Distobuccal
* Distolingual
* Mesiolingual
321
Some Maxillary first molars have 1 supplemental cusp on the mesial lingual surface called a
Cusp of Carabelli.
322
Some Maxillary first molars have 1 supplemental cusp on the mesial lingual surface called a
Cusp of Carabelli.
323
A maxillary first molar has how many roots?
3 roots
324
What are the names of the three roots of the maxillary first molars?
* Mesiobuccal
* Distobuccal
* Palatal
325
Maxillary first molars typically have 3 roots with how many canals?
4 root canals
326
Which of the maxillary first molar roots have 2 pulp canals?
MB root has 2 canals
327
Sometimes maxillary first molars will have 4 roots. This will be seen__ of the time. (What percentage)
0.05%
328
Do the roots of maxillary first molars diverge or merge?
Diverge
329
Is the palatal root of maxillary first molars long or short?
Long
330
MB roots of maxillary first molars typically curves in a____ direction.
distal
331
From the buccal view, maxillary first molars are___ in shape.
Trapezoidal
332
From the buccal view, maxillary first molars mesiobuccal cusp is typically____ than distobuccal cusp.
wider
333
From the buccal view, maxillary first molars Distobuccal cusp tip is usually_____ than mesiobuccal cusp tip
sharper
334
From the buccal view, maxillary first molars Buccal surface is divided by a________.
buccal groove
335
From the buccal view, maxillary first molars buccal groove extends about____and terminates in ____
halfway down the crown of the tooth from the occlusal; shallow depression (may or may not have a buccal pit where it ends)
336
From the buccal view, maxillary first molars mesial contact area is at the
junction of the occlusal and middle third
337
From the buccal view, maxillary first molars distal contact area is in the
middle third of the tooth
338
From the lingual view, maxillary first molars are_____ in shape.
trapezoidal
339
From the lingual view, maxillary first molars lingual aspect is more___ than the buccal aspect.
rounded
340
From the lingual view, maxillary first molars Mesiolingual cusp is the_____ cup of this tooth
largest
341
From the lingual view, maxillary first molars Distolingual cusp is______ than mesiolingual cusp.
sharper
342
From the lingual view, maxillary first molars ______divides the ML and DL cusps (commonly ends in a lingual pit).
Lingual groove
343
From the lingual view, maxillary first molars is the palatal root is visible?
Yes
344
From the lingual view, maxillary first molars have a _____ present running vertically down the palatal root.
Depression
345
From the lingual view, maxillary first molars 5th nonfunctional cusp arises on the_____ .
lingual surface of the ML cusp
346
From the lingual view, maxillary first molars have a 5th nonfunctional cusp on the lingual surface of the ML cusp called the
Cusp of Carabelli
347
A Supplemental, nonfunctioning cusp on the lingual surface of the ML cusp of many maxillary first molars
Cusp of carabelli
348
This nonfunctional cusp makes the maxillary first molar extremely identifiable
Cusp of carabelli
349
This nonfunctional supplemental cusp makes the maxillary first molar extremely identifiable
Cusp of carabelli
350
This cusp is present in 87.5% of maxillary first molars
Cusp of carabelli
351
This cusp of maxillary first molars differentiates and distinguishes populations and variable in presentation
Cusp of carabelli
352
From the proximal mesial view of the maxillary first molars, are the MB and ML cusps visible from this view?
Yes
353
From the proximal view of the maxillary first molars, mesial marginal groove is visible separating the ___cusps
MB AND ML
354
From the proximal distal view of the maxillary first molars, are the DB and DL cusps visible from this view?
Yes
355
From the occlusal view, the maxillary first molars are___ in shape.
Rhomboidal
356
From the occlusal view, the maxillary first molars mesial marginal ridge is___ and ____than the distal marginal ridge
longer; more prominent
357
From the occlusal view, the maxillary first molars, both marginal ridges are crossed by a ___
mesial marginal groove and distal marginal groove, respectively
358
From the occlusal view, the maxillary first molars there is a prominent___ ridge that crosses the occlusal surface diagonally.
oblique
359
From the occlusal view, the maxillary first molars, there is an oblique ridge formed by a
ridge extending from the distobuccal cusp and mesiolingual cusp
360
From the occlusal view, the maxillary first molars have the_____ distolingual lobe of the maxillary molars.
Largest
361
From the occlusal view, the maxillary first molars_______ separates the large distolingual cusp/lobe
distolingual groove
362
From the occlusal view, the maxillary first molars mesial cusp tips are visible from this view, as distal cusps tend to be___
shorter
363
The 3 roots of maxillary first molars are located ____
under the most prominent cusps
364
The 3 roots of maxillary first molars are located under which prominent cusps?
MB, ML, DB
365
When you connect the cusps of MB, ML and DB of the maxillary first premolars, they form a
triangle
366
Primary cusp triangle is a characteristic triangle found on
all maxillary molars
367
Maxillary first molars have the _____ distolingual lobe of the maxillary molars
Largest
368
From the occlusal view, the Distolingual groove of the maxillary first molars separates
the large distolingual cusp/lobe
369
From occlusal view of a maxillary first molar are the mesial cusp tips visible?
Yes
370
What are the tooth numbers for maxillary second molars in the Universal Numbering System?
2 & 15
371
What is the Eruption Date for maxillary second molars?
12-13 years old
372
When is the First evidence of calcification in maxillary second molars?
2.5-3 years old
373
When is Crown completion in maxillary second molars?
7-8 years old
374
When is Root completion in maxillary second molars?
14-16 years old
375
Maxillary second molars are the___ upper tooth from the back.
2nd
376
Maxillary second molars erupt mesial or distal to the maxillary first molars?
Distal
377
Are maxillary second molars succedaneous or nonsuccedaneous?
Nonsuccedaneous, they do not replace any primary teeth.
378
Maxillary second molars are compsed of how many developmental lobes?
4
379
There is much variation observed for Maxillary second molars , especially in the size of
the DL cusp
380
How many cusps do maxillary second molars have?
4 cusps
381
What are the four cusps of maxillary second molars?
* Mesiobuccal
* Distobuccal
* Distolingual
* Mesiolingual
382
Is it true that maxillary second molars can sometimes only have 3 cusps?
Yes
383
How many roots and canals do maxillary second molars have?
3 roots, 3 canals
384
What are the name of the roots of maxillary second molars?
* Mesiobuccal
* Distobuccal
* Palatal
385
Are the roots of maxillary second molars more or less divergent than a maxillary first molar?
Less divergent
386
Is it true that fusion of roots is more common in maxillary second molars than maxillary first molars?
Yes
387
Is it true that fusion of roots is more common in maxillary second molars than maxillary first molars?
Yes
388
From the buccal view, maxillary second molars are ____in shape.
Trapezoidal
389
The crown of a maxillary second molars is shorter or longer, wider or narrower mesiodistally than maxillary first molar?
Shorter and narrower
390
The Buccal groove of maxillary second molars are located more___ in comparison to maxillary first molar.
distal
391
Mesial and distal contact areas for maxillary second molars are in the
middle third of the tooth
392
From the Lingual View, Maxillary Second Molars, are___ in shape.
Trapezoidal
393
From the Lingual View, Maxillary Second Molars distolingual cusp is____ and____ than the DL cusp of a maxillary first molar
smaller; shorter
394
Sometimes in the maxillary second molar the distolingual cusp is not present. Is this true?
Yes
395
From the Lingual View, Maxillary Second Molars Mesiolingual cusp is the____ cusp of this tooth.
largest
396
From the Lingual View, Maxillary Second Molars, the Lingual groove is usually present and divides the___ cusps.
ML and DL
397
From the Lingual View of Maxillary Second Molars, is the Palatal root visible?
Yes
398
From the proximal mesial view of maxillary second molars,____ cusps visible from this view.
MB and ML
399
From the proximal Distal View of the maxillary second molars, are the DB and DL cusps visible from this view?
Yes
400
From the proximal Distal View of the maxillary second molars, the DB and DL cusps are ____ making more of the occlusal surface visible from a distal view.
Smaller
401
The Maxillary Second Molars from an Occlusal View is ___ in shape.
Rhomboidal or heart-shaped
402
The Maxillary Second Molars from an Occlusal View is ___ in shape.
Rhomboidal or heart-shaped
403
The Maxillary Second Molars from an Occlusal View, the more common shape of maxillary second molars is the ______
rhomboidal type; is similar to that of the first molar but with an even more accentuated outline
404
The Maxillary Second Molars from an Occlusal View, the less common shape of maxillary second molars is the
heart-shaped type; is more similar to the shape of a maxillary third molar
405
The Maxillary Second Molars from an Occlusal View the general outline of the crown is___ mesiodistally than a maxillary first molar.
narrower
406
In occlusal view Rhomboidal type maxillary second molars the DL cusp is___ than heart-shaped type
larger
407
In occlusal view Heart-shaped type maxillary second molars are DL cusp is quite small or large?
Small
408
The maxillary second molars has a prominent ___ ridge that crosses the occlusal surface obliquely (diagonally).
oblique
409
The oblique ridge of a maxillary second molars is more or less prominent than max. first molar?
Less
410
What are the teeth numbers for the maxillary third molars in the Universal Numbering System?
1 & 16
411
What are the Eruption Date for the maxillary third molars?
17-21 years old
412
When is the First evidence of calcification for maxillary third molars?
7-9 years old
413
When is Crown completion for maxillary third molars?
12-16 years old
414
When is Root completion for maxillary third molars?
18-25 years old
415
The maxillary third molars are the____ upper tooth from the back.
1st
416
Maxillary third molars erupt____ to the maxillary second molars
distal
417
Maxillary third molars are____ (they do not replace any primary teeth)
nonsuccedaneous
418
Maxillary third molars are composed of____ developmental lobes.
4
419
There is little or much variation observed for maxillary third molars?
Much
420
Is it true that there is no standard description for maxillary third molars?
Yes
421
When maxillary third molars well-formed, are they smaller or larger than the other maxillary molars?
Smaller
422
Maxillary third molars have similar or different anatomy to the other maxillary molars?
Similar
423
On maxillary third molars are there more or less supplemental grooves present?
More
424
The supplemental grooves of maxillary third molars are ____
small and indistinct
425
How many roots do maxillary third molars have?
3 roots
426
The roots of maxillary third molars usually are not diverged but oftentimes is
fused
427
The Roots of maxillary third molars are more or less divergent than a maxillary first or second molar?
Less
428
Fusion of roots is more common in______ than maxillary first molars
maxillary second molars and maxillary third molars
429
Maxillary third molars are _____in shape
Rhomboidal or heart-shaped
430
The more common heart-shaped type of maxillary third molars is more similar to the shape of a _______.
maxillary second molar
431
Maxillary third molars have more supplemental grooves on the ____surface.
occlusal
432
Maxillary third molars typically have how many cusps?
3 cusps
433
What are the three cusps of maxillary third molars?
MB, ML, and DB
434
The less common rhomboidal type of maxillary third molars have how many cusps?
4 cusps
435
What are the 4 cusps of maxillary third molars?
MB, ML, DB and DL
436
The DL cusp of maxillary third molars is
small and nonfunctional
437
Is the oblique ridge present on the occlusal surface of maxillary third molars?
Oblique ridge often not present
438
The roots of maxillary third molars generally are poorly or well developed?
Poorly
439
The roots of maxillary third molars are shorter than
first and second molar roots
440
The Roots of maxillary third molars curve
distally
441
What are two clinical conditions common in maxillary third molars?
Impaction and Microdontia
442
Mandibular molars typically erupt between ___ before the corresponding maxillary molars.
6 months to 1 year
443
Mandibular molars are wider____
mesiodistally
444
Mandibular molars are ______ in shape from an occlusal view
Rectangular or pentagonal
445
Crowns of mandibular molars have a strong____ inclination
lingual
446
Crowns of mandibular molars have a______ shape from a proximal view
rhomboidal
447
Mandibular molars usually have how many major cusps?
4 or 5 major cusps
448
Mandibular molars have many roots? And how many canals?
2 roots (bifurcated), 2 or more pulp canals
449
What are the teeth numbers mandibular first molars in the Universal Numbering System?
19 & 30
450
When is the Eruption Date for mandibular first molars?
6-7 years old
451
When is the First evidence of calcification for mandibular first molars?
birth
452
When is the Crown completion for mandibular first molars?
2.5-3 years old
453
When is Root completion for mandibular first molars?
9-10 years old
454
Mandibular first molars are the___ lower tooth from the back.
3rd
455
Mandibular first molars erupt___ to the mandibular second premolars
distal
456
Mandibular first molars are_____ (they do not replace any primary teeth)
nonsuccedaneous
457
Mandibular first molars can be the first permanent teeth to erupt in the oral cavity. Is this true?
Yes
458
Mandibular first molars are composed of ______developmental lobes
Five
459
Widest tooth mesiodistally in the permanent dentition
Mandibular first molars
460
How many functional cusps do mandibular first molars have?
5 functional cusps
461
What are the names of the 5 functional cusps of mandibular first molars?
* Mesiobuccal
* Distobuccal
* Distolingual
* Mesiolingual
* Distal (occasionally missing)
462
How many roots do mandibular first molars have?
2 roots
463
The roots of mandibular first molars are____ separated.
Widely
464
What are the names of the mandibular first molar roots?
* Mesial
* Distal
465
The mesial root of mandibular first molar roots is____
wider and stronger
466
How many pulp canals are in the 2 roots of mandibular first molars?
2 or 3 pulp canals (mesial root may have 2 canals)
467
The roots of mandibular first molars are usually the same length but if one is longer, it's typically the
mesial root
468
From this buccslview, which cusps of mandibular first molars are visible?
at least some part of all 5 cusps is visible
469
Which is the widest cusp for mandibular first molars?
Mesiobuccal cusp is largest and widest, with the highest cusp on the buccal side
470
The distobucal cusp of mandibular first molars is slightly___,___ and ____ than the MB cusp
smaller, shorter, and sharper
471
The mandibular first molar has a Distal cusp (despite its name), but is also considered a____ cusp due to its position on that side
buccal
472
Which is the lowest and sharpest cusp of these three for mandibular first molars? Distal cusp, DB cusp or MB cusp?
Distal cusp
473
The mesialbuccal and distobuccal Cusps of mandibular first molars are divided by
buccal grooves
474
The MB groove of mandibular first molars usually ends in a
buccal pit
475
From the lingual view, the Lingual aspect of mandibular first molars is similar to the
buccal aspect
476
How many cusps are on the lingual aspect of mandibular first molars?
Two lingual cusps
* ML
* DL
477
The ML and DL cusps of mandibular first molars are
pointed
478
From the lingual aspect, the mandibular first molar has a distal cusp that is divided by a
lingual groove
479
____divides the ML and DL cusps of mandibular first molars.
Lingual groove
480
Lingual grooves of mandibular first molars commonly ends in a
lingual pit
481
From the lingual view, there is a ______at root bifurcation for mandibular first molars.
deep developmental depression
482
From the proximal view, mandibular first molars are inclined toward the
lingual
483
From the proximal Mesial View, mandibular first molars’_____ cusps visible from this view
MB and ML
484
From the proximal mesial view of mandibular first molars, the_____ is usually about 1mm below cusp tips
Mesial marginal ridge
485
From the proximal mesial view of the root of mandibular first molars, there is a
Concave area at cervical third of crown that continues onto root (similar to the deep concavity of a maxillary first premolar)
486
From the proximal mesial view of mandibular first molars, the root is ____but, tapers in the ____
Broad and straight ; apical third
487
From the proximal mesial view of mandibular first molars, there is a_____ on root
Broad concavity or depression
488
From the proximal Distal View of mandibular first molars, the____ cusps visible from this view.
DB and DL
489
When comparing the crowns of the proximal mesial view and proximal distal view of mandibular first molars, which crown is shorter?
The distal proximal view
490
From the proximal distal view of mandibular first molars ___cusps are seen
some of all
491
The mandibular first molar converges toward the___ when seen from a proximal distal view, making some of the____ aspect visible
distal; buccal
492
From the occlusal view, mandibular first molars are____ in shape.
Pentagonal
493
From the occlusal view of the mandibular first molars, the lingual outline is divided into two parts by the
lingual groove
494
From the occlusal view, mandibular first molars mesial outline is divided into two parts by the
mesial marginal groove
495
From the occlusal view, mandibular first molars Distal outline is the shortest or longest of the sides?
Shortest
496
From the occlusal view, mandibular first molars Distal outline is divided into two parts by the
distal marginal groove
497
From the occlusal view, mandibular first molars typically have___ functional cusps
Five
498
What are the cusps of mandibular first molars from largest to smallest?
* MB
* ML
* DL
* DB
* Distal
499
The distal cusp of mandibular first molars is sharp or round?
Sharp
500
How many marginal ridges do mandibular first molars have?
Two marginal ridges are present
501
What are the two marginal ridges of mandibular first molars?
* Mesial marginal ridge
* Distal marginal ridge
502
What are the Teeth numbers for mandibular second molars in the Universal Numbering System?
18 & 31
503
When is the Eruption Date for mandibular second molars?
11-13 years old
504
When is the First evidence of calcification for mandibular second molars?
2.5-3 years old
505
When is Crown completion for mandibular second molars?
7-8 years old
506
When is Root completion for mandibular second molars?
14-15 years old
507
Mandibular second molars are the___ lower tooth from the back
2nd
508
Mandibular second molars erupt____ to the mandibular first molars
distal
509
Mandibular second molars are___ (they do not replace any primary teeth).
non succedaneous
510
Mandibular second molars are Composed of 4 developmental lobes.
4
511
Mandibular second molars are Smaller or larger than the mandibular first molar?
Smaller
512
Mandibular second molars have___ cusps. (How many?)
4
513
What are the names of the cusps of Mandibular second molars?
* Mesiobuccal
* Distobuccal
* Distolingual
* Mesiolingual
514
How many roots do mandibular second molars have?
2 roots
515
How many canals do mandibular second molars have?
2 or 3 canals
516
How many canals can the mesial root of mandibular second molars have?
mesial root can have 2 canals
517
What are the names of the two roots for mandibular second molars?
* Mesial
* Distal
518
Do mandibular second molars have root depressions?
Yes
519
The root depressions of mandibular second molars are deeper or shallower than the root depressions on a mandibular first molar?
Shallower
520
Fusion of roots is more common in which? mandibular second molars or mandibular first molars
Mandibular second molars
521
From the buccal view, mandibular second molars buccal groove divides
the mesiobuccal cusp and distobuccal cusp
522
From the buccal view, of the mandibular second molars’ mesiobuccal cusp and distobuccal cusp, which is bigger?
They are the same size
523
From the buccal view, the mandibular second molars’ Contact areas for are at the
junction of the middle and occlusal third
524
From the buccal view, the mandibular second molars’ Cusps are divided by
buccal grooves
525
Like mandibular first molars, mandibular second molars Lingual aspect___ to the buccal aspect.
similar
526
From the lingual aspect of mandibular second molars, are the Buccal cusps visible?
No
527
How many cusps does the lingual aspect of mandibular second molars have?
2 lingual cusps
528
What are the 2 lingual cusps of mandibular second molars?
* ML
* DL
529
Are the cusps of ML and DL of mandibular second molars pointed or dull?
pointed
530
Which of the lingual cusps of mandibular second molars are bigger?
They are the same-size
531
From the proximal view of mandibular second molars, the Buccal height of contour is at the
cervical third
532
From the proximal view of mandibular second molar The Lingual height of contour is
Middle third
533
From the proximal view of mandibular second molar, the root is but tapers in the
Broad and straight;apical third
534
When viewed from proximal mesial and distal views, are there marginal grooves on mandibular second molars?
No
535
From a proximal view of mandibular second molars, the ____cusps are visible from this view.
DB and DL
536
In the proximal view of mandibular second molars, the crown shorter on___, so some of all cusps are seen.
distal
537
When viewed from proximal of mandibular second molars, Since the crown is shorter on the distal, ____can be seen.
Some of all cusps
538
From the occlusal surface, mandibular second molars are___ in shape.
Rectangular
539
The Lingual outline of mandibular second molars is divided into two parts by the
lingual groove
540
The Mesial outline of mandibular second molars is divided into two parts by the
mesial marginal groove
541
The Distal outline (shortest of the sides) of mandibular second molars is divided into two parts by the
distal marginal groove
542
Which outline of the mandibular second molars is shortest?
Distal outline
543
From an occlusal view of mandibular second molars , they have how many cusps?
4 cusps
544
What are the 4 cusps of mandibular second molars?
* МВ
* DB
* ML
* DL
545
Other than marginal ridges what other types of ridge are present on mandibular second molars?
Transverse ridges
546
How many transverse ridges are present on mandibular second molars?
Two
547
Cross-shaped groove pattern on the occlusal surface of mandibular second molars formed by a
well-defined central groove crossing the well-defined buccal and lingual grooves
548
What are the Teeth numbers for mandibular third molars in the Universal Numbering System?
17 & 32
549
When is Eruption Date for mandibular third molars ?
17-21 years old
550
When is First evidence of calcification for mandibular third molars?
8-10 years old
551
When is Crown completion for mandibular third molars ?
12-16 years old
552
When is Root completion for mandibular third molars?
18-25 years old
553
mandibular third molars are the___ lower tooth from the back
2nd
554
mandibular third molars erupt___ to the mandibular second molars
Distal
555
mandibular third molars are_____ (they do not replace any primary teeth)
nonsuccedaneous
556
mandibular third molars are Composed of___ developmental lobes
4
557
Much or less variation observed for mandibular third molars ?
Much
558
Is there a standard description for mandibular third molars?
No
559
mandibular third molars Crown often is atypical or typical?
Atypical
560
When well-formed mandibular third molars Smaller or larger than the other mandibular molars?
Smaller
561
mandibular third molars has____ anatomy to the other mandibular molars
Similar
562
mandibular third molars can either be ____or shaped?
Heart or oval
563
mandibular third molars have More or less supplemental grooves present?
More
564
The supplemental grooves on mandibular third molars are
small, indistinct
565
mandibular third molars have how many roots?
2 roots
566
Often times the roots of mandibular third molars are
fused
567
Fusion of roots is very or not very common in mandibular third molars
Very common
568
mandibular third molars are wider____
buccolingually on the mesial than on the distal
569
mandibular third molars mesial cusps larger or smaller than distal cusps?
Larger
570
Occlusal surface of mandibular third molars appears
wrinkled
571
Occlusal surface of mandibular third molars appears
wrinkled
572
Mandibular third molars have an____ groove pattern.
irregular
573
The occlusal of mandibular third molars has____ supplemental grooves and occlusal pits.
numerous
574
If an excess of grooves and pits is present in , mandibular third molars it is described as
Crenulated
575
Partial eruption of these teeth is common.
mandibular third molars
576
mandibular third molars that partially erupt often leave surrounding gingival tissue covering the occlusal surface. This tissue covering is called an
operculum
577
___is an infection around the crown of a partially erupted tooth.
Pericoronitis
578
Pericoronitis is usually due to
poor homecare
579
_____is a very serious and rare condition that can develop from a Pericoronitis infection.
Ludwig angina
580
Ludwig angina can cause
Cellulitis and Impaired breathing
581
What is a Dentigerous cyst?
A developmental cyst that can form within the dental tissue of an impacted crown
582
Congenital syphylis can cause development of
mulberry molars
583
What are mulberry molars?
The molars will present with a crown with an abnormal shaped occlusal surface
584
mulberry molars are Characterized by
berry-like nodules or tubercles of enamel instead of cusps
585
What is an Enamel Pearl?
Its a Developmental disturbance of "Cervical enamel projections" associated with molars that is mainly found on buccal surfaces of second molars (but can be found anywhere)
586
What is the Common cause of furcation involvement?
Enamel Pearl
587
What is Furcation Involvement?
Furcation of a tooth (that is normally covered by alveolus) loses bony support
588
Furcation involvement occurs with loss of
periodontal support
589
A tooth that loses bony support in the area of the furcation is said to have
furcation involvement
590
Furcation involvement can be measured and classified with a
Nabor's Probe
