Maxillary Incisors

Question 1

1. When are the maxillary central incisors initially calcified?
2. When is the enamel completed?
3. When do they erupt?
4. When is the root completed?

Answer 1

1. 3-4 mo
2. 4-5 yr
3. 7-8 yr
4. 10 yr

Question 2

1. Which has a longer overall length, central or lateral incisor?
2. Which has a greater crown length?
3. What about root length?
4. Which has a wider mediodistal crown width

Answer 2

1. Central
2. Central
3. Same
4. Central

Question 3

Identify the lines (parts of incisors)

Answer 3

Question 4

1. When the maxillary incisors first erupt, at the bottom of the teeth are incisal _______
2. After wear, they become incisal ______, formed by the junction of the linguiincisal and labial surfaces

Answer 4

1. Incisal ridges
2. Incisal edges

Question 5

What do the maxillary incisors provide/assist with?

Answer 5

1. Functionally, they cut and shear
2. Esthetics
3. Phonetics

Question 6

What is the outline form of the maxillary central incisors?

Answer 6

Rectangular

Question 7

The incisal edges of maxillary central incisors are relatively straight with a slight rise to the MESIAL/DISTAL

Answer 7

Distal

Question 8

This angle of maxillary central incisors is a rounded right angle

Answer 8

Mesioincisal angle

Question 9

This angle of the maxillary central incisor is more rounded

Answer 9

Distoincisal Angle

Question 10

The DISTAL/MESIAL surface presents a straight outline, while the DISTAL/MESIAL surface is more rounded.

Answer 10

1. Mesial
2. Distal

Question 11

1. How many mammelons are present when the maxillary central incisors erupt?
2. Which is the smallest?

Answer 11

1. Three Mammelons
2. The middle mammelon is the smallest, the mesial and distal are approximately the same size

Question 12

Do maxillary central incisors have facial development grooves?

Answer 12

They MAY be present.

Question 13

What is the main difference between the mesial and distal contact point of the maxillary central incisors?

Answer 13

The contact of the mesial is located in the incisal third while the distal contact is located more cervically, and the junction of incisal and middle thirds

Question 14

1. Does the maxillary central incisor have a cingulum on the lingual aspect?
2. What is also possibly next to it?

Answer 14

1. Yes
2. Accessory Lingual Ridges

Question 15

On the lingual aspect of the maxillary central incisor, there is a distinctive depression under the cingulum called the…

Answer 15

Lingual Fossa

Question 16

Which has a larger lingual radius of the CEJ, the labial or lingual CEJ?

Answer 16

Labial has a larger radius, lingual has a smaller radius

Question 17

What is the shape of the crown outline of maxillary central incisors?

Answer 17

Wedge shaped/triangular

Question 18

1. Where is the facial height of contour on the maxillary central incisor?
2. What about the lingual height of contour?

Answer 18

1. Cervical third
2. On the cingulum on the cervical third of the crown

Question 19

What is unique about the CEJ of maxillary central incisors from the proximal aspect?

Answer 19

Significant mesial and distal curvature

Question 20

Maxillary incisors that have a deep lingual fossa and prominent marginal ridges (common in Asians, Eskimos, North and South American Indians) are called…

Answer 20

Shovel Shaped Incisors

Question 21

Proximally, where are the ridge and root apex?

Answer 21

Along the bisecting line

Question 22

What is the crown outline form of the maxillary central incisors from the incisal aspect?

Answer 22

Triangular

Question 23

From the incisal aspect, the incisal edge is centered over the…

Answer 23

Root

Question 24

1. On the maxillary central incisor, the radicular perspective of the root is shaped like a…
2. The cross section of the root is a rounded ______

Answer 24

1. Cone
2. Triangle

Question 25

The root of maxillary central incisors is usually straight but may lean towards the MESIAL/DISTAL

Answer 25

Distal

Question 26

On the root of maxillary central incisors, a mesial and distal root _______ may exist

Answer 26

root depression

Question 27

1. How many canals does the pulp cavity of the maxillary central incisor have? 2. It narrows towards the \_\_\_\_\_ 3. The largest portion is located \_\_\_\_\_\_ly 4. The pulp cavity tapers \_\_\_\_\_\_ly

Answer 27

1. One 2. Incisal 3. Cervically 4. Apically

Question 28

What are the most common morphological variations of the maxillary central incisors?

Answer 28

1. Shovel Shaped incisors 2. Short Root 3. Very long root 4. Deep lingual pit

Question 29

The maxillary lateral incisor is smaller in all dimensions than the maxillary central incisor except for...

Answer 29

Root length

Question 30

The mesial outline of the maxillary lateral incisors is STRAIGHT/ROUNDED

Answer 30

Straight, like the central incisors

Question 31

1. This distal outline and disto-incisal angle of the maxillary lateral incisor is STRAIGHT/ROUNDED 2. The disto-incisal angle resembles the angle of the adjacent...

Answer 31

1. Rounded, particularly the diso-incisal angle 2. Canine

Question 32

1. Where is the mesial contact point of the maxillary lateral incisors? 2. Where is the distal contact point?

Answer 32

1. Junction of middle and incisal thirds 2. Center of middle third

Question 33

Do the maxillary lateral incisors have a cingulum?

Answer 33

Yes

Question 34

On the lingual surface of the maxillary central incisors, the marginal ridges terminate into the...

Answer 34

Cingulum

Question 35

When looking at the maxillary lateral incisor from the lingual aspect, where is it located mesiodistally?

Answer 35

It is centered

Question 36

What is located where the marginal ridges converge gingivally on the maxillary lateral incisors?

Answer 36

A pit

Question 37

On the maxillary lateral incisor, what extends across the distal groove of the cingulum onto the root, continuing for part or all of its length?

Answer 37

A developmental groove

Question 38

1. In the proximal view of the maxillary lateral incisor, it resembles the central incisor except for what feature? 2. Is the ine through the long axis of the tooth through the incisal ridge and the middle of the crown?

Answer 38

1. The root looks longer 2. Yes

Question 39

From the incisal aspect, the maxillary lateral incisor resembles the central but it can also resemble the...

Answer 39

Canine

Question 40

The root of the maxillary lateral incisor resembles the central incisor. Curvature of the root is commonly to the ____ aspect

Answer 40

Distal

Question 41

1. Maxillary lateral incisors vary in form more than any other tooth except the... 2. What is an example of a morphologic variation?

Answer 41

1. Third molar 2. Peg Lateral

Question 42

1. How many canals does the pulp cavity of the maxillary central incisor have? 2. It narrows towards the \_\_\_\_\_ 3. The largest portion is located \_\_\_\_\_\_ly 4. The pulp cavity tapers \_\_\_\_\_\_ly

Answer 42

1. One 2. Incisal 3. Cervically 4. Apically

Question 43

In addition to peg laterals, what are other common morphological variations of maxillary lateral incisors?

Answer 43

1. Missing 2. Large pointed tubercle on cingulum 3. Deep palatoradicular groove extending down on the root 4. Twisted root 5. Distorted Crown