Term
Which of the following characteristics is not consistent with the maxillary premolars?
a. They usually have two cusps that are of approximately equal size
b. The crown is of approximately equal dimension faciolingually as it is mesiodistally
c. The lingual height of contour is in the middle of the crown occlusogingivally
d. The occlusal table is in the center of the crown faciolingually |
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Definition
| The crown is of approximately equal dimension faciolingually as it is mesiodistally |
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Term
Which of the following teeth characteristically has a mesial concavity?
a. Maxillary first premolar
b. Maxillary second premolar
c. Mandibular first premolar
d. Mandibular second premolar |
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Definition
| a. Maxillary first premolar |
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Term
Which of the following teeth does not have a mesiomarginal groove?
1. Maxillary first premolar
2. Mandibular first premolar
3. Maxillary second premolar
4. Mandibular second premolar
a. 1 only
b. 2 and 3
c. 2, 3, and 4
d. 1, 3, and 4
e. 1, 2, and 4 |
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Definition
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Term
How many cusps does the maxillary second premolar have?
a. 2 cusps
b. 3 cusps
c. 4 cusps
d. 5 cusps |
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Definition
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Term
How many triangle ridges does the maxillary second premolar have
a. 1
b. 2
c. 3
d. 4 |
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Definition
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Term
1. Tooth #13 characteristically exhibits a mesial concavity on the mesial surface of its anatomical crown
True/False |
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Definition
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Term
2. Which cusp occludes in the distal fossa of tooth #28
a. Lingual cusp of tooth #4
b. Lingual cusp of tooth #5
c. Buccal cusp of tooth #4
d. Buccal cusp of tooth #5 |
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Definition
| b. Lingual cusp of tooth #5 |
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Term
3. The first maxillary premolar usually erupts before the second maxillary premolar
True/False |
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Definition
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Term
4. The lingual cusp of the maxillary first premolar is located just mesial of the center of the crown mesiodistally while that of the second maxillary premolar is located in the middle of the crown mesiodistally
True/False |
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Definition
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Term
5. Root formation of the maxillary premolars should be complete by 15 years of age
True/False |
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Definition
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Term
1. When comparing the mandibular second premolar to the first premolar, which of the following statements are true?
a. When viewed from the lingual, less of the occlusal surface is visible on the second premolars
b. There is no mesiolingual groove on the second premolars
c. The 3 cusped version of the second mandibular is the most common
d. If theres only 2 cusps, the lingual cusp on the 2nd premolar is larger than the lingual cusp on the 1st premolar
e. All of the above |
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Definition
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Term
| 2. Using international system of tooth ID identify the mandibular left first premolar |
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Definition
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Term
| 3. An inspection of the facial aspect of the mandibular first premolar reveals that the proximal contacts are located: |
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Definition
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Term
| 4. According to Wheeler, at what age does the mandibular first premolar erupt? |
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Definition
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Term
In evaluating the maxillary molars, which of the following cusps make up the “trigon”?
1. Mesiobuccal
2. Distobuccal
3. Mesiolingual
4. Distolingual
5. Cusp of carabelli
a. 1 and 2
b. 2 and 3
c. 1, 2, and 3
d. 2, 3, and 4
e. 5 only |
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Definition
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Term
2. The facial height of contour of the maxillary first molar is more occlusal than the lingual height of contour
True/False |
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Definition
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Term
3. The cusp of carabelli has a pulp horn associated with it
True/False |
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Definition
|
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Term
. In evaluating the overall volumetric size of the cusps, which of the following cusps of the maxillary molars is the largest?
a. Mesiobuccal
b. Distobuccal
c. Mesiolingual
d. distolingual |
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Definition
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Term
Which two cusps contribute to the make up the oblique ridge?
1. Mesiobuccal
2. Distobuccal
3. Mesiolingual
4. Distolingual
a. 1 and 2
b. 2 and 3
c. 3 and 4
d. 1 and 4
e. None of the above |
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Definition
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Term
In transverse cross section at the cervix, the root outline of the maxillary first premolar is: Round.
Triangular.
Ovoid.
Kidney-shaped. |
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Definition
|
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Term
When viewed from the occlusal, the angle formed by the convergence of the distofacial cusp ridge and the distal marginal ridge of the maxillary first premolar is:
An obtuse angle.
A right angle.
An acute angle. None of the above |
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Definition
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Term
From the facial aspect, the maxillary first premolars have:
The mesial cusp slope longer than the distal cusp slope.
The mesial cusp slope shorter than the distal cusp slope.
The same relationship of cusp slopes as the maxillary canines. The mesial cusp slope equal to the distal cusp slope. |
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Definition
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Term
When viewed from the occlusal, the angle formed by the convergence of the mesiofacial cusp slope and the mesial marginal ridge of the maxillary first premolar is:
An obtuse angle.
A right angle.
An acute angle. None of the above |
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Definition
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Term
On the maxillary first premolars, when viewed from the occlusal, the facial height of contour is: Mesial to center.
Distal to center.
Centered on the crown mesiodistally.
Centered over the root trunk. |
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Definition
|
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Term
On the maxillary first premolars, when viewed from the facial, the facial cusp tip is: Mesial to center on the crown.
Distal to center on the crown.
Centered on the crown.
Shorter than the lingual cusp tip. |
|
Definition
|
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Term
On the maxillary first premolars, when viewed from the proximal, the lingual cusp is normally: Shorter than the facial cusp.
Taller than the facial cusp.
Same height as the facial cusp.
Variable in height. |
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Definition
|
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Term
The continuous ridge from cusp tip to cervical line on the facial surface of maxillary first premolars is called the: Incisal ridge.
Facial ridge.
Middle cervical ridge.
Oblique ridge. |
|
Definition
|
|
Term
On the maxillary first premolar, from the occlusal view: Only three developmental grooves are evident.
The facial cusp tip is mesial to center of the crown. The lingual cusp tip is mesial to center of the crown. The mesial contact is lingual to center of the crown. |
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Definition
|
|
Term
On the maxillary first premolar:
A facial ridge is mesial to center of the crown.
The central developmental groove connects the mesial and distal triangular fossae. The lingual cusp tip is sharper than the facial cusp tip.
All of the above |
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Definition
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Term
From the lingual view of the maxillary second premolar:
the cusps are approximately the same height.
the mesial marginal ridge is more cervically located than the distal marginal ridge. both cusp tips are located distal to center on the crown.
None of the above |
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Definition
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Term
Which of the following statements is true for both the maxillary first and maxillary second premolars? The crowns diverge toward the lingual.
Multiple supplemental grooves are present on the occlusal surface.
The root usually bifurcates in the cervical third.
The two cusp tips are within the confines of the borders of the root system. |
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Definition
|
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Term
The faciolingual intercuspal distance as seen from the proximal view is: greater on the maxillary first premolar than on the maxillary second premolar. greater on the maxillary second premolar than on the maxillary first premolar. the same on both maxillary premolars.
the same as maxillary molars. |
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Definition
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|
Term
Which of the following developmental grooves is usually found on both the maxillary first and maxillary second premolar? mesiofacial developmental groove
distofacial developmental groove
central developmental groove
mesial marginal developmental groove |
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Definition
|
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Term
The maxillary second premolars are represented in the Universal Notation System by which tooth numbers? 5 and 12
6 and 11
22 and 27
4 and 13 |
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Definition
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Term
Which of the following statements is correct with regard to the maxillary second premolar? The mesial marginal ridge is more cervically located than the distal marginal ridge.
Both facial and lingual cusp tips are located distal to center on the crown.
The lingual cusp slopes form a right angle from the lingual view.
The occlusal groove pattern exhibits multiple supplemental grooves. |
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Definition
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Term
The cervical root cross section is:
wider faciolingually than mesiodistally.
wider mesiodistally than faciolingually.
exhibits a distinct mesial developmental depression.
2
exhibits a distinct distal developmental depression. |
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Definition
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Term
From the occlusal view of the maxillary second premolar: The facial cusp slopes run diagonally across the crown. The cusp tips are distal to center on the crown.
The crown tapers slightly to the lingual.
The occlusal outline form is hexagonal. |
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Definition
|
|
Term
From the distal view of the maxillary second premolar:
The cusps heights are almost equal.
The distal marginal ridge is perpendicular to the long axis of the tooth. The triangular ridges of the occlusal surface are visible.
All of the above |
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Definition
|
|
Term
Which of the following statements is correct with regard to the maxillary first molar? The crown of the tooth tends to diverge toward the lingual.
The root system is quite wide mesiodistally.
The cusps are of equal size.
The three roots are of equal size. |
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Definition
|
|
Term
From the facial view of the maxillary first molar:
the mesial outline of the crown shows a deep depression in the cervical third. the cusp slopes of the distofacial cusp form approximately a right angle.
The cusp slopes of the mesiofacial cusp form an acute angle.
None of the above |
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Definition
|
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Term
From the facial view of the maxillary first molar, the CEJ is located approximately ____ mm from the bifurcation of the two facial roots?
2 mm
3 mm
4 mm
5 mm |
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Definition
|
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Term
Which of the following statements is correct with regard to the facial developmental groove? This groove extends onto the facial surface of the crown.
A developmental pit may be associated with this groove. This groove is usually in line with the facial bifurcation. All of the above |
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Definition
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Term
Which of the following statements is correct with regard to the facial view of the root system of the maxillary first molar? The two facial roots run almost parallel to one another.
The palatal root cannot be seen from the facial view.
The mesiofacial root usually curves distally in the apically third.
The outline of the root trunk is wider mesiodistally than the diameter of the crown. |
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Definition
|
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Term
| Rank the cusp sizes of the maxillary first molar from largest to smallest. mesiofacial, mesiolingual, distofacial, distolingual, fifth cusp mesiolingual, mesiofacial, distolingual, distofacial, fifth cusp mesiolingual, mesiofacial, distofacial, distolingual, fifth cusp mesiolingual, distolingual, mesiofacial, distofacial, fifth cusp |
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Definition
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Term
Which of the following is the correct location of the fifth cusp (Cusp of Caribelli)? mesial surface of the mesiolingual cusp
lingual surface of the distolingual cusp
lingual surface of the mesiolingual cusp
3
distal surface of the distolingual cusp |
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Definition
|
|
Term
Which of the following cusps is most centered over the root trunk area of the maxillary first molar? mesiofacial cusp
distofacial cusp
mesiolingual cusp
distolingual cusp |
|
Definition
|
|
Term
Which of the following cusps is not included in the primary cusp triangle of the maxillary first molar? mesiofacial cusp
distofacial cusp
mesiolingual cusp
distolingual cusp |
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Definition
|
|
Term
Which of the following developmental grooves unite and extend across two surfaces of the crown of the maxillary first molar? distal oblique developmental groove and central developmental groove
distal oblique developmental groove and facial developmental groove
distal oblique developmental groove and lingual developmental groove
distal oblique developmental groove and developmental groove of the oblique ridge |
|
Definition
|
|
Term
Which of the following root surfaces of the maxillary first molar exhibits a developmental depression? lingual surface of the mesiofacial root
facial surface of the distofacial root
lingual surface of the palatal root
facial surface of the palatal root |
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Definition
|
|
Term
Which root of the maxillary first molar is the broadest faciolingually? mesiofacial root
distofacial root
mesial root
palatal root |
|
Definition
|
|
Term
From the mesial view of the maxillary first molar:
the facial cervical ridge forms the facial height of contour.
the faciolingual diameter of the root spread is broader than the diameter of the crown. the CEJ shows little curvature.
All of the above |
|
Definition
|
|
Term
From the distal view of the maxillary first molar:
the lingual height of contour is located in the cervical third of the crown.
the facial height of contour is located in the middle third of the crown.
the distofacial cusp is more centered over the root trunk than is the distolingual cusp. the distal contact is centered both faciolingually and occlusocervically. |
|
Definition
|
|
Term
From the occlusal view of the maxillary first molar:
the distofacial line angle forms an acute angle.
the primary cusp triangle forms a large portion of the occlusal surface.
the mesiofacial line angle forms an obtuse angle.
the lingual height of contour is usually formed by the mesiolingual and distolingual cusps. |
|
Definition
|
|
Term
The two acute line angles formed by the occlusal outline of the maxillary first molar are: mesiolingual and distofacial.
mesiolingual and mesiofacial.
4
mesiofacial and distolingual. mesiofacial and distofacial. |
|
Definition
|
|
Term
Portions of which two cusps form the oblique ridge of the occlusal surface of the maxillary first molar? Mesiofacial and distolingual
Mesiolingual and distofacial
Mesiofacial and mesiolingual
Mesiolingual and distolingual |
|
Definition
|
|
Term
Of the six developmental grooves found on the maxillary first molar, how many are located on the occlusal surface of the crown?
two
three
four five |
|
Definition
|
|
Term
When examining the cervical cross section of the maxillary first molar, the root system is: wider mesiodistally than faciolingually.
wider faciolingually than mesiodistally.
smoothly ovoid in form.
None of the above |
|
Definition
|
|
Term
Which root of the maxillary first molar usually has two root canals? mesiofacial root
distofacial root
palatal root
None of the above |
|
Definition
|
|
Term
Which of the following statements is correct with regard to the maxillary second molar? The crown of the maxillary second molar converges to the lingual.
The crown is usually wider faciolingually than mesiodistally.
The facial bifurcation is usually located distal to the facial developmental groove.
All of the above |
|
Definition
|
|
Term
When comparing the maxillary first and second molars:
the crown of the maxillary second molar is taller occlusocervically than the crown of the maxillary first molar.
the facial cervical ridge is not as pronounced on the maxillary second molar as it is on the maxillary first molar.
the crown of the maxillary second molar usually diverges toward the lingual as does the crown of the maxillary first molar. a large Cusp of Caribelli is usually present on the mesiolingual cusp of the maxillary first and second molars. |
|
Definition
|
|
Term
From the facial view of the maxillary second molar the mesial contact is located: in the occlusal third of the crown.
at the junction of the occlusal and middle thirds of the crown.
in the middle third of the crown.
at the junction of the middle and cervical thirds of the crown. |
|
Definition
|
|
Term
The largest cusp of the maxillary second molar is usually the: mesiofacial cusp.
mesiolingual cusp.
distofacial cusp.
distolingual cusp. |
|
Definition
|
|
Term
Which root of the maxillary second molar is most likely to have two root canals? mesiofacial root
5
mesiolingual root palatal root distofacial root |
|
Definition
|
|
Term
When comparing the root systems of the maxillary first and second molars: The root system of the maxillary second molar is narrower faciolingually. The three roots of the maxillary second molar run more parallel.
The root system of the maxillary second molar is more compact.
All of the above |
|
Definition
|
|
Term
When examining the distal view of the maxillary second molar, you can see portions of the: Facial surface.
Occlusal surface.
Lingual surface.
All of the above |
|
Definition
|
|
Term
The primary cusp triangle of the maxillary second molar does not include the: mesiofacial cusp.
mesiolingual cusp.
distofacial cusp.
distolingual cusp. |
|
Definition
|
|
Term
Which of the following anatomic features is more likely to be found on the maxillary first molar than on the maxillary second molar?
root system that is very wide faciolingually
crown that is wider mesiodistally on the lingual than on the facial
prominent fifth cusp on the lingual surface of the crown. All of the above |
|
Definition
|
|
Term
When comparing maxillary third molars to maxillary first and second molars, the maxillary third molars are more likely to have a:
squared coronal outline.
long divergent root system.
fused root system. prominent fifth cusp. |
|
Definition
| long divergent root system |
|
|
Term
When evaluating the occlusal view of the maxillary molars, the maxillary third molar is more likely to have: a rounded coronal outline.
many supplemental grooves.
a root system that is not wider than the crown faciolingually.
all of the above |
|
Definition
|
|
Term
Which cusp is usually the largest cusp of the maxillary third molar? mesiofacial cusp
distofacial cusp
lingual cusp
fifth cusp |
|
Definition
|
|
Term
Which of the following statements is correct regarding the anatomy of the maxillary third molar? More occlusal surface is visible from the mesial than from the distal view.
The CEJ is usually very flat and regular in form.
The roots are usually widely separated.
None of the above |
|
Definition
|
|
Term
Which of the following is correct with regard to the coronal anatomy of the maxillary third molar?
The crown is taller occlusocervically than the crowns of other maxillary molars.
The crown usually demonstrates a more regular groove pattern than the crowns of other maxillary molars. The CEJ is usually more irregular in form than the CEJ of other maxillary molars.
The crown usually has five cusps. |
|
Definition
| The CEJ is usually more irregular in form than the CEJ of other maxillary molars. |
|
|
Term
From the facial view of the mandibular second molar: three facial cusps are visible.
facial cusps appear taller and sharper than lingual cusps. lingual cusps appear taller and sharper than facial cusps. only the facial cusps are visible. |
|
Definition
|
|
Term
From the facial view of the mandibular second molar:
the mesial outline of the crown is straighter than the distal outline of the crown.
the mesial contact is located at the junction of the occlusal and middle thirds of the crown. the distal contact is located in the middle third of the crown.
All of the above |
|
Definition
|
|
Term
From the mesial view of the mandibular second molar:
the mesiofacial cusp is shorter and more blunt than the mesiolingual cusp. the mesiolingual cusp is shorter and more blunt than the mesiofacial cusp. the two mesial cusps are of equal height.
the two distal cusps are in view and are taller than the mesial cusps. |
|
Definition
|
|
Term
From the mesial view of the mandibular second molar:
the facial height of contour is near the occlusal third of the crown.
the lingual height of contour is near the cervical third of the crown.
the facial height of contour is near the cervical third of the crown.
the facial and lingual heights of contour are at the same level occlusocervically. |
|
Definition
|
|
Term
From the distal view of the mandibular second molar:
all four cusps are visible.
more occlusal surface is visible than from the mesial view.
the distal cusps are further apart faciolingually than are the mesial cusps. All of the above |
|
Definition
|
|
Term
When comparing the mandibular first and second molars, which of the following features is common to both teeth? four cusps of equal size
two roots that are widely separated mesiodistally
a large central fossa and two triangular fossae
two facial developmental grooves |
|
Definition
|
|
Term
When examining the occlusal view of the mandibular first and second molars, which of the following features is common to both teeth?
faciolingual position of the distal contact
number of cusps
occlusal outline form of the crown None of the above |
|
Definition
|
|
Term
Which of the following developmental grooves is not located on the occlusal surface of the mandibular second molar? facial developmental groove
distofacial developmental groove
lingual developmental groove
central developmental groove |
|
Definition
|
|
Term
Which of the following statements is correct when examining the cervical cross section of the mandibular second molar? The root is wider mesiodistally than faciolingually.
Depressions are usually located on the facial and lingual surfaces of the root.
Occasionally there may be only one "C-shaped" canal.
All of the above |
|
Definition
|
|
Term
From the facial view of the mandibular first molar, the root bifurcation is: in line with the mesiofacial developmental groove.
distal to the mesiofacial developmental groove.
mesial to the mesiofacial developmental groove.
in line with the distofacial developmental groove. |
|
Definition
|
|
Term
From the mesial view of the mandibular first molar, the contact area is: centered occlusocervically.
centered faciolingually.
located in the facial third of the crown.
located in the cervical third of the crown. |
|
Definition
|
|
Term
| From the lingual view of the mandibular first molar: the lingual cusps are taller than the facial cusps. the distal cusp forms the distal height of contour. the roots appear longer than from the facial view. all of the above |
|
Definition
|
|
Term
When examining the distal view of the mandibular first molar: the contact area is located facial to center on the crown.
there is a deep developmental depression on the root surface. the lingual cusps are shorter than the facial cusps.
the distal marginal ridge is broader faciolingually than the mesial marginal ridge. |
|
Definition
|
|
Term
The cusps of the mandibular first molar are ranked in size from largest to smallest: mesiofacial, mesiolingual, distofacial, distal, distolingual.
mesiofacial, distofacial, distal, mesiolingual, distolingual.
distofacial, mesiofacial, distal, distolingual, mesiolingual.
mesiofacial, mesiolingual, distolingual, distofacial, distal. |
|
Definition
|
|
Term
On the mandibular first molar:
the facial height of contour is located in middle third of the crown.
the lingual height of contour is located in the cervical third of the crown.
the facial height of contour is located in the cervical third of the crown.
the facial and lingual heights of contour are at the same level on the crown. c |
|
Definition
|
|
Term
On the mandibular first molar:
the mesial root usually curves less than the distal root.
the mesial root usually has only one canal.
the bifurcation is equidistant from the CEJ on the facial and lingual surfaces. the root trunk has a facial and lingual developmental depression. |
|
Definition
|
|
Term
On the mandibular first molar:
the central fossa is the largest fossa.
all developmental grooves meet in the central pit.
the lingual developmental groove is the longest developmental groove.
the triangular fossae are located facial and lingual to the central developmental groove. |
|
Definition
|
|
Term
From the distal view of the mandibular first molar:
9
the distal root is narrower faciolingually than the mesial root.
the distal marginal ridge is shorter faciolingually than the mesial marginal ridge. the facial surface tapers more to the distal than the lingual surface.
all of the above |
|
Definition
|
|
Term
From the facial view of the mandibular second premolar, the proximal contacts are: located in the occlusal third of the crown.
located at the junction of the occlusal and middle thirds of the crown.
centered occlusocervically.
located in the cervical third of the crown. |
|
Definition
|
|
Term
From the facial view of the mandibular second premolar:
the mesial outline of the crown is longer than the distal outline of the crown.
The root is conical in form and is wider than the root of the mandibular first premolar. The mesial slope of the facial cusp is shorter than the distal slope of the facial cusp. All of the above |
|
Definition
|
|
Term
From the lingual view of the "three cusp type" mandibular second premolar the: heights of the three cusps are almost equal.
mesiolingual cusp is taller than the distolingual cusp.
distolingual cusp is taller than the mesiolingual cusp.
facial cusp tip is hidden from view. |
|
Definition
|
|
Term
When comparing the facial views of the mandibular first and second premolars, the mandibular second premolar has a: sharper facial cusp.
sharper root apex.
more bell-shaped crown.
wider mesiodistal dimension. |
|
Definition
|
|
Term
On a "Y type" mandibular second premolar the:
lingual developmental groove usually extends onto the lingual surface.
mesial developmental groove is shorter than the distal developmental groove. mesial developmental groove is longer than the distal developmental groove. central developmental pit is centered mesiodistally. |
|
Definition
|
|
Term
On the mandibular second premolar, a developmental depression of the root usually is associated with which of the following surfaces?
facial surface
lingual surface
mesial surface distal surface |
|
Definition
|
|
Term
On the "three cusp type" mandibular second premolar, which triangular ridge is the largest? mesiolingual triangular ridge
distolingual triangular ridge
facial triangular ridge
All triangular ridges are of equal size. |
|
Definition
|
|
Term
From the mesial view of the mandibular second premolar:
the mesial marginal ridge is almost perpendicular to the long axis of the tooth. The facial cusp is the tallest cusp.
The distolingual cusp is usually hidden from view.
All of the above |
|
Definition
|
|
Term
From a proximal view of the mandibular second premolar, the position of the facial cusp tip is usually located over the: center of the root.
facial border of the root.
junction of the facial and middle thirds of the root.
lingual border of the root. |
|
Definition
|
|
Term
From the distal view, you can usually see: the distolingual cusp.
the mesiolingual cusp.
the facial cusp.
all of the above |
|
Definition
|
|
Term
From the facial view of the mandibular first premolar:
the mesial slope of the facial cusp is longer than the distal slope of the facial cusp. the distal slope of the facial cusp is longer than the mesial slope of the facial cusp. the cusp slopes of the facial cusp are equal in length.
None of the above |
|
Definition
|
|
Term
From the lingual view of the mandibular first premolar: the facial triangular ridge is quite prominent.
both marginal ridges may be seen.
the lingual cusp is mesial to center on the crown.
All of the above |
|
Definition
|
|
Term
Which of the following developmental grooves is unique to the mandibular first premolar? mesial marginal developmental groove
mesiolingual developmental groove
mesiofacial developmental groove
mesial developmental groove |
|
Definition
|
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Term
From the proximal view of the mandibular first premolar, the facial cusp tip is: centered over the crown faciolingually.
facial to center on the crown.
lingual to center on the crown.
facial to the mesial contact area. |
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Definition
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Term
From the lingual view of the mandibular first premolar:
the two cusp tips are located mesial to center on the crown.
a developmental groove may be evident on the crown and root. much of the occlusal surface is visible.
All of the above |
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Definition
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Term
From the occlusal view of the mandibular first premolar the:
coronal outline is bilaterally symmetrical.
facial cusp is much larger than the lingual cusp.
mesial contact, lingual cusp tip and distal contact fall in a straight line. transverse ridge crosses the occlusal surface mesiodistally. |
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Definition
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Term
Which of the following anatomic features form the transverse ridge? facial cusp slopes
facial and lingual cusps
facial and lingual triangular ridges
mesial and distal marginal ridges |
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Definition
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Term
From which view does the mandibular first premolar most resemble a canine? facial view
lingual view
mesial view
distal view |
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Definition
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Term
From a proximal view, the lingual height of contour is located: At the junction of the occlusal and middle thirds of the crown. In the middle third of the crown.
At the junction of the middle and cervical thirds of the crown. In the cervical third of the crown. |
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Definition
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