Term
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Definition
| Anatomical division of a crown. Teeth either develop from 4 (central incisor) or 5 lobes (first molars). Lobes are separated by developmental grooves. |
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Term
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Definition
| Small projections of enamel on the incisal edge of newly erupted anterior teeth. They wear away. |
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Term
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Definition
| Convex mount of enamel on the lingual part of an anterior tooth. It is in the cervical (lower) 1/3 of the crown. |
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Term
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Definition
| Is found on cuspid on chewing surface. Maxillary and mandibular first bicuspids have two cusps (buccal & lingual). The mandibular second bicuspid has three cusps (one buccal & two lingual). |
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Term
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Definition
| The enamel border that is on the mesial and distal borders. |
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Term
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Definition
| Ridge of enamel from cingulum to cusp tip on lingual side of cuspids. |
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Term
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Definition
| Each cusp has four cusp ridges that are named according to direction the go away from cusp tip (mesial/distal/facial/lingual) |
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Term
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Definition
| There is a triangular ridge of enamel on the cusp made of the incline. The cusp angle depends on whether the cusp is flat or pointy. The angle is the angle the triangular ridge makes with the plane perpendicular to the long axis of the tooth. |
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Term
| Which teeth have an oblique ridge |
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Definition
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Term
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Definition
| Union between triangular ridge of distobuccal cusp and distal cusp ridge of mesiolingual cusp. |
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Term
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Definition
| The concavity on lingual side of incisors. Surrounded by mesial & distal marginal ridge, cingulum, and incisal edge of tooth. |
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Term
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Definition
| There are two of these on posterior teeth. Located next to marginal ridges. |
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Term
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Definition
| Central concavity on molars and mandibular second bicuspids. |
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Term
| Do bicuspids besides seconds ones have central fossa and triangular fossa? |
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Definition
| They don't have central fossa. They DO have mesial and distal triangular fossa. |
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Term
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Definition
| Valley on occlusal side of tooth that forms due to inclines of adjacent cusps or ridges. |
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Term
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Definition
| Where the lobes of crown junction with each other. Occur on labial/buccal, lingual, and occlusal side of teeth. Least noticeable on labial side of anteriors. |
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Term
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Definition
| Groove that branches off developmental groove. Not a junction of primary tooth parts. |
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Term
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Definition
| Fault line that occurs in developmental groove. Represents a lack of union between the inclined walls of the sulcus. |
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Term
| Where are pits usually found |
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Definition
| End of a developmental groove for where two fissures intersect. |
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Term
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Definition
| Space diverging from where teeth contact eachother. Types: facial, lingual, gingival, occlusial/incisal. |
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Term
| Which teeth have circular, rounded outlines from occlusal view? |
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Definition
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Term
| Which teeth have rectangular outlines from occlusal view? |
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Definition
| Lower second molar & Upper bicuspids |
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Term
| Which teeth have trapezoid (two parallel sides) shape |
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Definition
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Term
| Which teeth have rhomboidal shape |
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Definition
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Term
Which of the following primary teeth is MOST likely to have an oblique ridge?
Maxillary canine
Maxillary first molar
Maxillary second molar
Mandibular first molar
Mandibular second molar |
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Definition
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Term
When compared to the primary mandibular first molar, the primary mandibular second molar normally exhibits a GREATER number of which of the following?
Oblique ridges
Roots
Cusps
Cervical ridges
Transverse ridges |
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Definition
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Term
The occlusal outline of a mandibular first molar is similar to a
circle.
square.
hexagon.
pentagon
rhomboid. |
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Definition
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Term
On the crown of the primary maxillary first molar, the mesial surface normally
A. is larger than the distal surface of the same tooth.
B. exhibits a concave lingual outline.
C. is wider occlusocervically than buccolingually.
D. exhibits a straight cervical line.
E. is wider buccolingually at the occlusal table than at the cervical third. |
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Definition
| Is larger than the distal surface of the same tooth |
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Term
Mesial and distal pulp horns are MORE likely to be found in which of the following teeth?
Maxillary central incisors
Mandibular central incisors
Mandibular canines
Maxillary first premolars
Mandibular first premolars |
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Definition
| Maxillary central incisors |
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Term
Initiation of calcification for the mandibular central incisor normally occurs at
3-4 months of age.
1 year of age.
2-3 years of age.
4-5 years of age.
6-7 years of age |
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Definition
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Term
Of the primary maxillary teeth, the cervical ridge would stand out MOST prominently as a distinct entity on which surface of which molar?
First molar, distofacial surface
First molar, mesiofacial surface
Second molar, distofacial surface
Second molar, mesiolingual surface
Second molar, distolingual surface |
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Definition
| First molar, mesiofacial surface |
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Term
During endodontic therapy, one will usually find two pulp canals in which of the following?
A. Mandibular canine
B. Distofacial root of a maxillary molar
C. Distal root of a mandibular first molar
D. Mesial root of a mandibular first molar
E. Lingual root of a maxillary first molar |
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Definition
| Mesial root of a mandibular first molar |
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Term
Each of the following can be found in the dental pulp EXCEPT one. Which one is this EXCEPTION?
Nerve tissue
Blood vessels
Cementoblasts
Lymph vessels |
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Definition
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Term
On a maxillary first molar, the occlusal outline contains two obtuse and two acute angles. The acute line angles are
mesiolingual and distolingual.
mesiofacial and distolingual.
mesiolingual and distofacial.
mesiofacial and distofacial.
distofacial and distolingual. |
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Definition
| mesiofacial and distolingual. |
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Term
Ordinarily, a 6-year-old child would have which of the following teeth clinically visible?
All primary teeth only
All primary teeth and permanent first molars
Primary posterior teeth, permanent first molars, and central incisors
Primary canines, permanent first molars, and permanent mandibular incisors |
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Definition
| All primary teeth and permanent first molars |
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Term
Which of the following BEST describes the occlusal outline of a maxillary first molar from an occlusal view?
Ovoid
Square
Rectangular
Pentagonal
Rhomboidal |
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Definition
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Term
Which of the following represents the total number of teeth in the permanent dentition that normally possess a cingulum?
4
6
8
12
16 |
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Definition
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Term
Which of the following BEST describes the normal root of the mandibular canine, in cross section at the CEJ?
A. Circular, symmetrical
B. Triangular, symmetrical
C. Ovoid, symmetrical
D. Ovoid, but wider mesiodistally at the lingual
E. Ovoid, but wider mesiodistally at the labial |
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Definition
| Ovoid, but wider mesiodistally at the labial |
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Term
Identify the anterior tooth that MOST frequently exhibits a bifurcated root and identify the positions of the roots.
Tooth
Root Position
Maxillary lateral
Mesial and distal incisor
Maxillary lateral |
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Definition
| Mesial and Distal incisor |
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Term
Which of the following teeth is the LEAST likely tooth to have a bifurcation of the root?
Mandibular canine
Mandibular central incisor
Maxillary central incisor
Mandibular lateral incisor
Maxillary second premolar |
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Definition
| Maxillary Central incisor |
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Term
Which of the following represents the slight incisocervical concavity on the labial crown surface of the canines that is found in the incisal third, just mesial to the labial ridge?
Mesial fossa
Mesiolingual fissa
Mesial marginal ridge
Mesiolabial line angle
Mesiolabial developmental depression |
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Definition
| Mesiolabial developmental depression |
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Term
Compared to a maxillary second premolar, a maxillary first premolar has
A. two roots, one facial and one lingual.
B. three developmental grooves.
C. one root containing two root canals.
D. a shorter central groove.
E. two roots, one mesial and one distal. |
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Definition
| two roots, one facial and one lingual. |
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Term
A pronounced developmental groove is usually present on a marginal ridge of which of the following teeth?
Maxillary canine
Maxillary first premolar
Mandibular second premolar
Mandibular first molar
Maxillary second molar |
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Definition
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Term
Which of the following represents the number and the location of cusps on the Y-type mandibular second premolar?
No lingual and one facial
One lingual and one facial
One lingual and two facial
Two lingual and one facial
Two lingual and two facial |
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Definition
| Two lingual and one facial |
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Term
Which of the following primary teeth is usually bilaterally symmetrical when viewed facially and incisally?
Mandibular central incisor
Maxillary central incisor
Maxillary lateral incisor
Mandibular lateral incisor
Mandibular canine |
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Definition
| Mandibular central incisor |
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Term
The marginal ridges are more prominent on the lingual surface of which of the following incisors?
Maxillary central
Mandibular central
Maxillary lateral
Mandibular lateral |
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Definition
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Term
Where is the lingual height of contour located on a mandibular first premolar?
A. Occlusal third
B. Junction of the occlusal and middle thirds
C. Middle third
D. Junction of the middle and cervical thirds
Cervical third |
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Definition
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Term
Which of the following teeth has the greatest cervico-occlusal crown height?
Maxillary first premolar
Mandibular second premolar
Maxillary first molar
Mandibular second molar
Maxillary second molar |
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Definition
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Term
The oblique ridge of the maxillary molars extends between which two cusps?
Mesiofacial and distofacial
Mesiolingual and distolingual
Mesiolingual and distofacial
Mesiofacial and mesiolingual
Mesiofacial and distolingual |
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Definition
| Mesiolingual and distofacial |
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Term
On a panoramic radiograph of this patient, the dentist will expect to see each of the following features EXCEPT one. Which one is this EXCEPTION?
A. Primary maxillary lateral incisors with partially resorbed roots.
B. Partially erupted maxillary central incisors with incomplete root closure at the apex.
C. Partially erupted mandibular lateral incisors with incomplete root closure at the apex.
D. Fully erupted mandibular central incisors with complete root formation and closure at the apex.
E. Fully erupted mandibular first molars with incomplete root formation and non-closure at the apex. |
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Definition
| Fully erupted mandibular central incisors with complete root formation and closure at the apex. |
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Term
A radiograph of the maxillary central incisors reveals a small, calcified radiopaque mass between the roots of Teeth #8 and #9. Which of the following is the MOST likely reason for this mass?
Distodens
Mesiodens
Talon cusp
Dens in dente
Peg lateral incisor |
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Definition
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Term
Which of the following primary teeth has a distinctly prominent facial cervical ridge that makes it different from other teeth?
Maxillary canine
Mandibular canine
Mandibular first molar
Maxillary second molar
Maxillary central incisor |
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Definition
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Term
As viewed from the lingual, the lingual cusp of a maxillary first premolar is inclined
distally.
mesially.
distofacially.
mesiolingually.
directly over the center mesiodistally. |
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Definition
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Term
The cusp of Carabelli occurs with sufficient frequency to be considered normal in which of the following molars?
Primary maxillary first
Primary maxillary second
Mandibular first
Maxillary second |
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Definition
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Term
The presence of mamelons in a 10-year-old patient suggests which of the following conditions?
Fluorosis
Malnutrition
Malformation
Anterior open bite
Retained primary teeth |
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Definition
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Term
The developmental groove between the distofacial cusp and the distal cusp of a mandibular first molar is the
facial.
distal.
distofacial.
mesiofacial.
distal oblique. |
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Definition
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Term
Which of the following permanent roots is thin mesiodistally, wide faciolingually, and concave on both mesial and distal surfaces?
Maxillary central incisor
Mandibular central incisor
Mandibular second premolar
Facial root of a maxillary first premolar
Lingual root of a maxillary first molar |
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Definition
| Mandibular central incisor |
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Term
Which of the following represents the structure in the maxillary alveolar bone that maxillary premolar roots occasionally penetrate?
Antrum
Nasal septum
Frontal sinus
Zygomatic arch
Mandibular fossa |
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Definition
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Term
Which of the following features helps to distinguish a maxillary lateral incisor from a mandibular lateral incisor? The maxillary lateral has
a thinner incisal, ridge.
a crown more twisted on the root.
a more pronounced lingual foss
a root that is flattened mesiodistally.
a mesioincisal angle that is sharper. |
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Definition
| a more pronounced lingual foss |
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Term
When compared to a maxillary first molar, the roots of a maxillary second molar
are longer.
are more divergent.
are fewer in number.
have less potential for fusion.
are greater in distal inclination. |
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Definition
| are grater in distal inclination |
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Term
On the lingual crown surface of maxillary canines, which of the following is the structure located immediately mesial to the distolingual fossa?
Cingulum
Lingual ridge
Mesiolingual fossa
Mesial marginal ridge
Distal marginal ridge |
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Definition
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Term
Which of the following teeth normally has the longest root?
Maxillary canine
Mandibular canine
Maxillary central incisor
Mandibular first premolar
Maxillary second premolar |
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Definition
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Term
Which of the following mandibular molar proximal crown surfaces normally exhibits the LARGEST size?
Mesial of the first
Distal of the first
Mesial of the second
Distal of the second
Mesial of the third |
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Definition
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Term
Dental Morphology Question 46 of 63
The major grooves of the mandibular second molar form which of the following patterns?
H
Y
X
+
- |
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Definition
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Term
Dental Morphology Question 47 of 63
As distinguished from a maxillary canine, a mandibular canine typically has
a sharper facial cusp tip.
contact areas located more incisally.
a more pronounced cingulum.
a more convex mesial border, when viewed facially. |
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Definition
| contact areas located more incisally |
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Term
Which of the following teeth has its mesial marginal ridge located more cervically than its distal marginal ridge?
Mandibular first premolar
Maxillary first premolar
Maxillary first molar
Primary mandibular first molar
Mandibular second molar |
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Definition
| mandibular first premolar |
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Term
Which of the following represents the ridge on the occlusal surface of the maxillary first molar that normally forms the distal boundary of the central fossa?
Oblique
Distal marginal
Mesial marginal
Mesial cusp ridges of the MF cusp
Distal cusp ridges of the DF cusp |
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Definition
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Term
A transverse ridge results from the union of
Mesial and distal marginal ridges
Facial and lingual cusp ridges
Facial and lingual triangular ridges
Marginal and triangular
Cusp ridge and triangular ridge |
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Definition
| Facial and lingual triangular ridges |
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Term
Which of the following is normally exhibited by maxillary second premolars?
Two roots
A mesial concavity of the crown
A facial crown contour that is greatly inclined to the lingual
A lingual height of contour in the cervical third of the crown
A crown that is wider faciolingually than mesiodistally |
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Definition
| A crown that is wider faciolingually than mesiodistally |
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Term
Which of the following teeth might possess three cusps?
Maxillary second premolar and maxillary first molar
Maxillary second premolar and mandibular first premolar
Maxillary first molar and mandibular second molar
Maxillary second molar and mandibular first premolar
Maxillary second molar and mandibular second premolar |
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Definition
| maxillary second molar & mandibular second premolar |
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Term
Dental Morphology Question 53 of 63
A mandibular first molar usually has how many roots and canals?
Two roots and two canals
Two roots and three canals
Three roots and two canals
Three roots and three canals |
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Definition
| two roots and three canals |
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Term
Which of the following roots MOST likely has two canals?
Facial root of the maxillary first premolar
Palatal root of the maxillary first molar
Distofacial root of the maxillary first molar
Mesiofacial root of the maxillary first molar
Distal root of the mandibular first molar |
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Definition
| Mesiofacial root of the maxillary first molar |
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Term
Dental Morphology Question 55 of 63
The mixed dentition stage is normally initiated by the
exfoliation of the primary maxillary central incisor.
exfoliation of the primary maxillary second molar.
exfoliation of the primary mandibular second molar.
eruption of the maxillary first molar.
eruption of the mandibular first molar |
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Definition
| eruption of mandibular first molar |
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Term
At age 8, the maxillary first molar has
a mesial contact with the primary first molar.
a distal contact with the second molar.
no mesial contact.
no distal contact.
not yet erupted. |
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Definition
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Term
When viewed from the sagittal plane, the axial inclination of the anterior teeth
remains vertical.
inclines facially.
inclines mesially.
inclines distally.
inclines lingually. |
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Definition
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