Midterm Flashcards
(261 cards)
1
Q
Dental anatomy
A
Defines as but not limited to: the study of development, morphology, function, and identity of each of the teeth in the human dentition. The way in which the teeth relate in shape, form, structure, color, and function to the other teeth in the same dental arch and opposing arch
2
Q
Dentition
A
Refers to all the teeth in the maxilla and mandible. Can be primary, mixed, or permanent. Or artificial with dentures or implants
3
Q
Primary teeth
A
Deciduous teeth, also called milk teeth, begin formation at 14 weeks in utero.
4
Q
First eruption of primary teeth and completion
A
At about 6 months adn complete at about 28 months (3 years) and remain intact until the child is around 6.
5
Q
Permanent teeth, first eruption and completion
A
Adult dentition, first eruption about 6 years and complete at about 14 or 15. These teeth will remain in tact until disease, trauma, or death.
6
Q
Mixed dentition
A
State where deciduous and permanent teeth exist. Around ages 6-12. “Ugly duckling stage”
Not a true dentition
7
Q
Succedaneous teeth
A
Permanent teeth that replace the deciduous teeth.
Primary canine is replace by the permanent canine.
8
Q
Are all permanent teeth succedaneous
A
No. But all succedaneous teeth are permanent.
9
Q
Arches
A
Maxillary and madibular
10
Q
Anterior and posterior
A
Ant-incisors and canine
Post- premolars and molars
11
Q
Quadrants
A
From midline distal half of each arch. Maxillary right, maxillary left, mandibular right, mandibular left.
12
Q
Sextants
A
Divide mouth into six parts. Max right posterior, max anterior, max left post. Mand Right posterior, mand anterior, mand left posterior.
13
Q
Tooth types
A
Incisor, canine, premolar, molar
14
Q
Dental formulae primary dentition
A
I (1/2) C(1/1) M(2/2)=10
For one arch so multiplied by 2 would be 20
15
Q
Dental formulae permanent dentition
A
I(2/2) C(1/1) P(2/2) M(3/3)=16
One arch (multiply by 2 for 32 total teeth)
16
Q
Dental formulae
A
Used to differentiate the human dentition from other mammals. Primarily used by veterinarians and anthropologists.
17
Q
In what order are the names of teeth given
A
Dentition, arch, side, tooth. D.A.S.T.
EX: permanent maxillary right premolar
18
Q
Palmer notation
A
Mostly used by orthodontist. Bracket marks for quadrant, number or letter for tooth from midline out. 1-8 in four quadrants
19
Q
International numbering system
A
Federation denataire internationale (FDI)
20
Q
Federation dentaire international
A
Utilizes two single digit numbers that should be separated by a coma. 1st number indicates both arch and dentition. 1-4 for permanent dentition, 5-8 for primary. 1=UR, 2=UL, 3=LL, 4=LR. 5=UR, 6=UL, 7=LL, 8=LR. 2nd number indicates tooth from midline 1-8 for permanent and 1-5 for primary.
21
Q
Universal numbering system
A
Most common, utilizes numbers for permanent teeth and letters for primary teeth. 1-16, 17-32; A-J and K-T
22
Q
What is the root covered by
A
Cementum
23
Q
What is the crown covered in
A
Enamel
24
Q
Where do the crown and root join
A
Cementoenamel junction
25
Hard tissues of a tooth
Enamel, cementum, dentin
26
Soft tissue of tooth
Pulp
27
Enamel
Covers crown, enamel is the hardest substance in the human body, mostly inorganic, calcified and 95% hydroxyapatite.
28
What germ layer does enamel develop from
Ectoderm
29
Dentin
Makes up the major bulk of the tooth. Mostly inorganic and about 70% hydroxyapatite. Hard yellowish tissue underlying the enamel and cementum.
30
What does dentin form from? Structure and germ layer
From dental papilla from mesoderm.
31
Cementum
Covers the root surface, about 65% hydroxyapatite. Dull yellow external surface of the root. Covers the dentin on the root surface.
32
What germ layer and structure does cementum develop from
Develops from the dental sac that is from mesoderm
33
Pulp tissue
Soft, non calcified tissue in the pulp chamber. Furnishes nerve and blood supply to the tooth.
34
What structure and germ layer is pulp tissue derived from
Dental papilla from mesoderm.
35
Compartmentalizations of pulp tissue
Chambers, horns, orifice, canals, apical foramen, and lateral canals.
36
Pulp chamber
The chamber is the portion of the pulp tissue located within the crown of the tooth.
37
Pulp canal
The canal is the portion of the pulp tissue located in the root of the tooth. It ends as it exits the apex of the tooth through the apical foramen or a lateral canal.
38
Alveolar process
Portion of the jaw serving as support for the tooth
39
Alveolus
The bone of the tooth socket
40
Gingiva
The gingival tissue or “gums” covering the bone
41
Periodontal ligament
Fibers that attach the tooth to bone, or the tooth adjacent to it.
42
Periodontal ligament fibers
1-alveolar crest
2-horizontal
3-oblique
4-apical
5-interradicular
6-transseptal
1-5 attach bone to tooth and #6 attaches tooth to proximal tooth
43
Bifurcation of roots
The root portion of the tooth may be single with one apex or multiple, with a bifurcation or trifurcation deviding the root into two or three roots each having an apex.
44
Pulp horns
Portion of the pulp chamber that reaches occlusally usually following the form of cusps. Special consideration when restoring teeth is needed to avoid accidental exposure
45
Cusps
Cusps are the pointed feature that forms the chewing surface of the tooth. Molars have multiple, premolars usually have two, and canines one.
46
Tooth surfaces
Mesial, distal, facial (labial for anterior), lingual, Incisal , buccal
47
Line angles
Formed by the junction of 2 surfaces, derives its name from the two surfaces. I.e, mesiofacial line angle or distofacial line angle.
48
Point angles
Formed by the junction of three surfaces and named by these surfaces. I.e., mesiofacioincisal
49
Proximal contact area functions
Prevents food impaction, stabilize the dental arch, prevents drifting of teeth.
50
Embrasures
The negative space areas that surround teeth
51
Four embrasures
Incisal/occlusal
Lingual
Gingival
Facial/buccal
52
Cusp
Elevation or mound on the coronal portion of tooth making up a divisional part of occlusal surface.
53
Bolk tubercle
Excessive formation of enamel
54
Tubercle
Small elevation on the crown produced extra enamel growth
55
Cingulum
The lingual lobe of the anterior teeth. Makes up the bulk of the cervical third
56
Marginal ridges
Rounded boarders of enamel that form the mesial and distal margins of the occlusal surface of posterior teeth and the lingual surface of anterior teeth
57
Triangular ridges
Descend from tips of cusps to central part of occlusal surface in premolars and molars
58
Transverse ridge
Formed by joining of buccal and lingual triangular ridges
59
Oblique ridge
Formed by joining of buccal and lingual triangular ridges crossing obliquely over the occlusal surfaces of maxillary molars from distal buccal to mesial lingual
60
Central fossa
On occlusal surface of molars. Formed by converging ridges ending at a central point in the bottom of the depression where there is a junction of grooves
61
Triangular fossa
On occlusal surface just inside marginal ridges on molars and premolars. Sometimes found on lingual surface.
62
Developmental groove
Shallow groove or line between primary parts of the crown or root
63
Supplemental groove
Branch off of developmental grooves-do not mark a junction of primary parts.
64
Lobes
Primary sections of formation in the development of a crown
65
Mamelon
Visual appearance of the three lobes found on the Incisal edge of newly erupted incisors.
66
Pit
Small pinpoint depressions located at junctions or terminals of developmental grooves
67
Fissure
Like pits, but they extend longitudinally along developmental or supplemental grooves
68
Root trunk
Common root of a multi rooted tooth
69
Furcation
Where roots divide into separate roots form the root trunk in a multi rooted tooth. Can have a bifurcation or trifurcation
70
Functions of incisors
Cutting food, allow articulate speech, help support lip and maintain appearance, guide mandible during jaw movement
71
Incisal ridge
Makes up all of the Incisal portion of the crown.
72
Perikymata
Fine horizontal lines on the crown surface and are usually lost with age due to abrasion
73
Two anomalies of maxillary central incisors
Longer crown, shorter root
74
T/F-the mesial contacts of 8/9 adn 24/25 are the only teeth in permanent dentition that have mesial surfaces in contact with each other
True
75
First calcification of maxillary central incisors
3-4 months
76
Enamel completion of maxillary central incisors
4-5 years
77
Eruption of maxillary central incisors
7-8 years
78
Root completion of maxillary central incisors
9-10 years
79
Height of contour of maxillary central incisors facial and lingual
Cervical third
80
Straighter side of maxillary central incisor
Mesial side
81
More curved side of maxillary central incisor
Distal
82
Root shape from facial aspect of maxillary central incisor and location to a bisecting line
Cone shape, blunt apex, and slightly distal to bisecting line
83
Mesial and distal height of contour of maxillary central incisor
Mesial-Incisal third
Distal- junction of Incisal and middle third
84
What does exaggeration of the mesial and distal marginal ridges give rise to on incisors
Shovel shape incisors
85
1st calcification of maxillary central incisors
3-4 months
86
First calcification of maxillary lateral incisors
10-12 months
87
First calcification of mandibular central incisors
3-4 months
88
First calcification of mandibular lateral incisors
3-4 months
89
First calcification of maxillary canines
4-5 months
90
First calcification of mandibular canines
4-5 months
91
First calcification of maxillary first premolar
1.5-1.75 years
92
First calcification of maxillary 2nd premolars
2-2.25 years
93
Enamel completion of maxillary central incisors
4-5 years
94
Enamel completion of maxillary lateral incisors
4-5 years
95
Enamel completion of mandibular central incisors
4-5 years
96
Enamel completion of mandibular lateral incisors
4-5 years
97
Enamel completion of maxillary canines
6-7 years
98
Enamel completion of mandibular canines
6-7 years
99
Enamel completion of maxillary 1st premolar
5-6 years
100
Enamel completion of maxillary 2nd premolars
6-7 years
101
Eruption of maxillary central incisors
7-8 years
102
Eruption of maxillary lateral incisors
8-9 years
103
Eruption of mandibular central incisors
6-7 years
104
Eruption of mandibular lateral incisors
7-8 years
105
Eruption of maxillary canines
11-12 years
106
Eruption of mandibular canines
9-10 years
107
Eruption of maxillary 1st premolar
10-11 years
108
Eruption of maxillary 2nd premolar
10-12 years
109
Root completion of maxillary central incisors
9-10 years
110
Root completion of maxillary lateral incisors
11 years
111
Root completion of mandibular central incisors
8-9 years
112
Root completion of mandibular lateral incisors
10-11 years
113
Root completion of maxillary canines
13-15 years
114
Root completion of mandibular canines
12-14 years
115
Root completion of maxillary 1st premolar
12-13 years
116
Root completion of maxillary 2nd premolar
12-14 years
117
The Incisal edge of a mandibular central incisor is _______ to a bisecting line
Lingual
118
The ________ edge is more square on all incisors and the _______ edge is more round
Mesial, distal
119
What does the depth of the fossa correspond to
Intensity of marginal ridges
120
Labial and lingual height of contacts of a mandibular central incisors
Both In the cervical third
121
Which developmental groove on the root of a mandibular central incisor is deeper
The distal and sometimes contains a developmental groove
122
“I” beam effect
Longitudinal root depressions on both the mesial and distal. Root is slightly more narrow on the lingual than facial
123
The Incisal ridge of the crown on a mandibular central incisor is _________ from mesial to distal
Straight
124
The lingual surface of the crown is smooth with ________ marginal ridges
Inconspicuous
125
The curvature on the CEJ of all incisors is larger on the mesial than distal T/F
True
126
The cervical line is more ___________ on the lingual than on the labial
Apical
127
The ______ and _______ distal root surfaces have small developmental depression in a mandibular central incisor
Mesial and distal
128
The mandibular lateral incisors Incisal ridge angle from _______
Facial to lingual
129
The mandibular lateral incisors are slightly larger than the mandibular central incisors T/F
True
130
The distoincisal angle of the mandibular later incisor is more _______ because it follows the canine on the measeal
Rounded
131
The cingulum of the mandibular later incisor is displaced noticeably to the ________
Distal
132
The mandibular lateral incisors display a unique bend to the lingual that is referred to as the _______
Distolingual twist
133
The heights of contour of the mandibular lateral incisors M/D adn F/L
M-Incisal third
Distal- cervical third
Facial and lingual- cervical third
134
Fusion
When two adjoining tooth germs join to from a single large crown with two root canals, usually in the incisor area
135
Gemination
When a single tooth germ splits or shows an attempt at splitting, usually a single root and a single root canal
136
Concrescence
When two independently formed teeth become fused, usually fused by cementum with two roots and two root canals. More common in third molars.
137
Transition from anterior to posterior teeth
Canines
138
The four canines form the _____________ of the mouth
Cornerstones
139
What is the most stable tooth in the mouth
Canines. Difficult even sometimes impossible to replace
140
First tooth from the midline with a cusp
Canine
141
Cusps of a canine
Mesial cusp ridges and distal cusp ridge
142
Labial surface of a maxillary canine has a _________
Vertical labial ridge
143
Lingual surface of canines is sometimes referred to as “S-shaped” T/F
True
144
The labiolingual measurement of the maxillary canine is around ______ ________than that of a maxillary central incisor while the mesiodistal measurement is _______
1mm greater
1mm less
145
___________ of maxillary canine shows greater development than the that of the maxillary central incisor
Cingulum
146
The cusp tip of a maxillary canine is ________ to a bisecting line
Facial
147
Height of contour on the M/D and F/L of a maxillary canine
M-junction of Incisal and middle third
D-middle third
F and L- cervical third
148
Canine eminence
Bony ridge over the labial portion of the canine roots that give normal facial expression at corners of mouth and helps give transition from ant to post
149
The maxillary canines have ___ labial lobes and ____lingual
3 and 1
150
Middle facial lobe of maxillary canine
Forms a prominent labial ridge which runs cervicoincisally near the center of the crown in the middle and Incisal thirds. Makes up the bulk of the cusp
151
The mesial and distal slope of the maxillary canine is also known as
The mesial and distal cusp ridges
152
On the maxillary canine the _________ cusp ridge is ________ than the ___________
Mesial cusp ridge is shorter than the distal
153
The cusp ridges of a maxillary canine take up about _______ of the cervicoincisal length of the crown
One third
154
The cusp tip of a maxillary canine Is located on ________ through the center of the root
A line
155
Lingual ridge of a maxillary canine
Runs cervicoincisally from cingulum to cusp
156
Mesail and distal lingual fossa of a maxillary canine are located __________
One other side of the lingual ridge
157
What marginal ridge is usually more present on a maxillary canine
Mesial marginal ridge
158
Maxillary canines have greater bulk in which direction
Labiolingually
159
The cusp tip of a maxillary canine is _________ to a line bisecting the long axis of the tooth (looking from mesial)
Facial/labial
160
The root of a maxillary canine is wider __________ than __________
Faciolingually than mesiodistally
161
The longitudinal depressions on the mesial and distal root surfaces of a maxillary canine are more prominent on which surface
Distal
162
The ________ marginal ridge is heavier and more irregular in outline than the __________ marginal ridge in a maxillary canine
Distal , mesial
163
The ______ and ______ properties are emphasized from the Incisal view of a maxillary canine
M/D and L/L
164
Some ____________________ resemble __________ from the Incisal aspect
Maxillary lateral incisors resemble canines
165
The ________________ has the largest labiolingual root dimension of any tooth in the mouth
Maxillary canine
166
Pulp of a maxillary canine is narrow in the __________ aspect and wider _________
Mesiodistal and wider labiolingual
167
Where does the greatest curvature of the labial surface of a maxillary canine occur ?
Middle one third
168
Where does the greatest curvature of the lingual surface of a maxillary canine occur ?
Cervical one third when mesially
169
The entire labial outline of a maxillary canine has more convexity than the maxillary central incisors T/F
True
170
When a maxillary canine is viewed form the Incisal view, the tip of the cusp is ________ to the center of the crown mesiodistally
Labial
171
The cusp tip of a mandibular canine is ________ to bisecting line
Lingual
172
If there is a curvature at the apex of a mandibular canine what way does it curve towards
Mesial
173
The mandibular canine usually has straight roots, but the overall tooth may curve distally. T/F
True
174
Anomaly of mandibular canine
Bifurcated roots
175
The mandibular canine is narrower _____________than that of the maxillary canine
Mesiodistally
176
The mandibular canine crown is as long or frequently shorter than the maxillary T/F
False. It is frequently longer.
177
The mandibular canine ROOT may be as long as or slightly shorter than the maxillary T/F
True
178
The labiolingual diameter of the crown and root of the mandibular canine is usually _____________ than the maxillary
Slightly less
179
The mandibular canine has a larger cingulum and bulkier marginal ridges than the maxillary T/F
F. Smaller cingulum and less bulky MR’s
180
The ________ of the mandibular canine is not as well developed as that of the maxillary
Cusp
181
The _____________ dimension of the mandibular canine is less than those of the maxillary
Mesiodistal
182
The crown of the mandibular canine appears __________ and __________ compared to the maxillary
Longer and narrower
183
The cusp tip of mandibular canine is ________ bisecting the root
On a line
184
The ______ cusp ridges are shorter than the _________ on a mandibular canine
Mesial, distal
185
Many mandibular canines give the impression of being bent ________ on the root base, while maxillary canine crowns are more like to be _______with the root
Distally, in line
186
Height of contour of mandibular canine M/D
M-Incisal third
D-junction of Incisal and middle third
187
The angel formed by the MCR and DCR or a mandibular canine is ___________ than the maxillary canine
More obtuse
188
The _________ is much smoother and flatter on mandibular canines than on maxillary
Lingual surface
189
Height of contour of the mandibular canine facial/lingual
F and L heights of contour are in the gingival third
190
The cusp tip of a mandibular canine is ____________________ the bisecting line (looking from mesial)
On or slightly lingual to
191
The cingulum of a mandibular canine is centered _____________ from the Incisal view
Slightly displaced to the distal
192
The mandibular canine shares a feature with the mandibular lateral incisors that it does not share with the maxillary canine. What is it?
Distolingual twist
193
The mandibular canine can have two root canals while the maxillary never will have more than one T/F
True
194
The maxillary first premolars develop from how many lobes
4
195
What tooth do maxillary premolars resemble from a buccal view
Canine
196
The crown of a maxillary 1st premolar is __________ than the canine by __________
Shorter than by 1.5 to 2mm
197
The crown of a maxillary first premolar is _________ in shape
Trapezoidal
198
The mesial outline of a maxillary 1st premolar from the CEJ to the mesial contact area is
Slightly concave
199
The crest of curvature lies where in regards to the CEJ on a maxillary 1st premolar
Immediately occlusal to the halfway point
200
On a maxillary 1st premolar Which cusp ridge is more straight and long and which is shorter and curved
Mesial buccal cusp ridge is straight and longer and the distal is shorter and more curved
201
Ona maxillary 1st premolar the mesial slope of the buccal cusp can be ______
Notched or have a visible concave outline
202
In a line bisecting the crown of a maxillary 1st premolar from the buccal view, where does the top of the buccal cusp lie
Distal to the line
203
The distal outline of the crown of a maxillary 1st premolar from the CEJ to the height of contact is …
Straighter that’s the mesial but may be slightly more concave
204
The _________ contact area is represented by a broader curvature than is found ________
Distal , mesially
205
How many mm shorter are the roots of a maxillary 1st premolar compared to a canine
3-4 mm
206
The _________ cusp is shorter than the ________ cusp on a maxillary 1st premolar, causing both cusps to be visible form what view
Lingual is shorter than the buccal causing both to be visible from a lingual view
207
Why does the crown of a maxillary 1st premolar taper to the lingual
Because the lingual cusp narrower mesiodistally than the buccal cusp
208
What part of the CEJ on a maxillary 1st premolar shows more curvature
The part towards the apex on the buccal aspect
209
Height of contour on the buccal surface of a maxillary 1st premolar
Junction of the Middle and gingival third or w/in gingival third
210
The buccal cusp tip is ________with the middle of the buccal root on a maxillary 1st premolar
In line
211
The mesial marginal ridges of maxillary 1st premolars sit where
At the junction of the middle and Incisal third
212
What are the two distinguishing features of a max 1st premolar from a mesial aspect
Mesial marginal developmental groove
Mesial development depression
213
What feature of a max 1st premolar often times gets mistaken for a crack
The mesial marginal developmental groove
214
Mesial marginal developmental groove
Extends across the mesial marginal ridge onto the mesial proximal surface directly lingual to the mesial contact area
215
The buccal outline of the buccal root of a max 1st premolar is straight with a tendency towards a ___________
lingual inclination
216
The buccal root of a maxillary 1st premolar may take a ____________or _______ curve in the apical third
Lingual or buccal
217
The lingual root of a max 1st premolar …
Is relatively straight but may curve to the buccal or lingual
218
The root of a max 1st premolar is smooth looking mesially except for what
The developmental groove
219
MMR vs DMR in a max 1st premolar
MMR is more occlusal than the DMR
220
The crown of a max 1st premolar from the distal aspect is convex at all points except for …
A small flattened arc just cervical to the contact area and buccal to the center of the distal surface
221
There is a distal marginal developmental groove on a max 1st premolar T/F
FALSE
222
Is there a development depression on the distal of a max 1st premolar
No
223
Maxillary 1st premolar occlusal aspect
Irregular hexagonal shape with the crown being wider on the buccal than the lingual
224
The crest of the buccal ridge is _______ to the crest of the lingual ridge
Distal
225
The mesial contact area of a max 1st premolar is ______ to the distal contact area
Lingual
226
The buccal cusp tip of a max 1st premolar is _________ on a bisecting line
Distal
227
What cusp ridge is longer on a max 1st premolar
Mesiobuccal cusp is ridge is longer than the distobuccal cusp ridge
228
All premolars except the maxillary first have the buccal cusp tip _________to a bisecting line
Mesial
229
The lingual cusp tip of both maxillary premolars is ________to a bisecting line
Mesial
230
What are the occlusal surfaces of a max 1st premolar circumscribed by
Cusp and marginal ridges
231
Maxillary 1st premolar occlusal table outline
Buccal cusp tip
Mesiobuccal cusp ridge
Mesial marginal ridge
Mesial lingual cusp ridge
Lingual cusp tip
Distolingual cusp ridge
Distal marginal ridge
Distobuccal cusp ridge
Buccal cusp tip
232
What divides the surfaces of a max 1st premolar evenly buccolingually
Central developmental groove
233
The _____________ groove joins the central ridge on a max 1st premolar
Distobuccal
234
What two grooves are off the central groove on the mesial side of a max 1st premolar
Mesiobuccal developmental groove and the mesial marginal developmental groove
235
The junctions of the grooves on a max 1st premolar form what
Mesial and distal developmental pits
236
What depressions surround the mesial and distal developmental pits of a max 1st premolar
The mesial and distal triangular fossa
237
Buccal triangular ridge of max 1st premolar
Is prominent, starting at the central groove and extending to the buccal cusp tip
238
The lingual triangular ridge of a max 1st premolar
Less developed than the BTR and runs from the central groove to the lingual cups tip
239
The maxillary 2nd premolar is ______ angled and ________ rounded
Less and more
240
How many roots does the maxillary 2nd premolar have
1
241
The maxillary 2nd premolar crown is smaller _______
Cervico-occlusally and mesiodistally. But it can also be larger in these dimensions
242
The root of the max 2nd premolar is
As long as or longer than the 1st premolar
243
The buccal cusp of the max 2nd premolar isn’t as long as the 1st and it is more _______ in shape
Blunt
244
What cusp ridge is shorter and what is longer on the max 2nd premolar
Mesiobuccal cusp ridge is shorter than the distobuccal cusp ridge
245
Is the lingual cusp of the 1st or 2nd max premolars longer
2nd making the crown longer on the lingual side
246
Cusps of the max 2nd premolar are ________ than the 1st
Shorter
247
What widens the occlusal surface of the max second premolars buccolingually
A greater distance between the cusp tips
248
Mesial depression on the surface of the crown of the max 2nd premolar
Does not exist
249
Does the max 2nd premolar have a deep mesial marginal developmental groove
No
250
What is the most significant difference of the 1st and 2nd max premolar from the mesial aspect
Max 2nd premolar has a single root
251
The _______ root depression is deeper than the ______ on max 2nd premolars
Distal, mesial
252
Why is understanding the location and depth of the distal depression on the max 2nd premolar important
This area can trap a lot of plaque and cause bone loss. Proper cleaning of this is crucial
253
Compare the central grooves of the 1st and 2nd max premolars
The central groove of the 2nd is shorter and more irregular
254
What kind of grooves can be seen abundantly on the max 2nd premolar
Multiple supplementary grooves giving it a wrinkled appearance
255
The buccal cusp tip of a max 2nd premolar is _______ to a bisecting line
Mesial
256
A maxillary premolar with more than one root is most likely a
Maxillary 1st premolar
257
The cusps of maxillary premolars are located
One buccal, one lingual
258
The maxillary premolars are trapezoidal in shape from both a mesial and buccal aspect T/F
True
259
An anatomical feature that can be used to distinguish premolars is the
Mesial marginal developmental groove
260
The developmental depression on the root of a maxillary 2nd premolar is deepest in the ____________ side
Distal
261
On a maxillary central incisor what makes the tooth appear thicker from a distal view than a mesial view
A slope towards the distal in the Incisal third
