PERMANENT ANTERIOR TOOTH MORPHOLOGY - Maxillary incisors

Question 1

Name developmental lobes A-D

Answer 1

Question 2

What is the lingual/palatal lobe called?

Answer 2

cingulum

Question 3

How many developmental lobes are there?

Answer 3

4

3 Labial lobes
1 Lingual/palatal lobe (cingulum)

Question 4

What are the anterior secondary teeth called?

Answer 4

all succedaneus

(replace primary teeth)

Question 5

How many roots do the anterior teeth have?

Answer 5

1

Question 6

How would you describe the shape of the mesial/distal view of anterior teeth?

Answer 6

triangular

Question 7

How would you describe the shape of the labial/palatal view of anterior teeth?

Answer 7

trapezoidal

Question 8

What is the interproximal view?

Answer 8

side on

mesial/distal view

Question 9

What letter represents the palatal developmental lobe of the anterior teeth?

Answer 9

A = CINGULUM

Question 10

Name structures B and C (palatal surface)

Answer 10

A = mesial marginal ridge
B = distal marginal ridge

Question 11

What are the largest mesial/distal incisor teeth ?

Answer 11

the maxillary 1s

Question 12

When do maxillary central incisors erupt?

Answer 12

7-8 years

Question 13

What do you call the grooves highlighted here? (maxillary central incisor)

Answer 13

developmental depressions

Question 14

Name structures A-C (central maxillary incisal)

Answer 14

A = distal labial lobe
B = middle labial lobe
C = mesial labial lobe

Question 15

Name structures A and B (maxillary central incisal)

Answer 15

A = disto-incisal angle
B = mesio-incisal angle

Question 16

Where is the imbrication line of the central incisal maxillary teeth?

Answer 16

groove, where the anatomical crown moves towards the root of the tooth

Question 17

Name structure A

Answer 17

PALATAL FOSSA

Question 18

What is the role of the palatal fossa?

Answer 18

guide food towards back of the mouth

Question 19

What can form in the palatal fossa?

Answer 19

palatal groove
palatal pit

Question 20

What tooth is shown here?

Answer 20

maxillary central incisors

Question 21

What is characteristic of the maxillary central incisal mesial surface?

Answer 21

deep CEJ curvature

Question 22

Where is the mesial contact point in the maxillary central incisors?

Answer 22

in the incisal 1/3 of the crown

bottom arrow

Question 23

Where is the distal contact point in the maxillary central incisors?

Answer 23

junction of the incisal and middle 1/3

Question 24

What is the long axis of a tooth?

Answer 24

crown to root tip

Question 25

What is the orientation of the maxillary central incisor?

Answer 25

Incisal edge is labial to long axis.

Question 26

What does the incisal edge being labial to long axis mean?

Answer 26

the incisors protrude out form the long axis to towards the labial surface

Question 27

Describe the features of the maxillary central incisor shown here

Answer 27

Incisal edge is labial to long axis. Longer mesial marginal ridge (brown). Distally displaced cingulum (red) Labio-incisal edge (arrow) Incisal ridge (blue)

Question 28

When do the maxillary lateral incisors erupt?

Answer 28

8 and 9

Question 29

How does the lateral incisor differ from the central incisor?

Answer 29

Resembles the central incisor in all views but the crown is smaller and more rounded.

Question 30

In the lateral incisal teeth, which is sharper. the disto-incisal angle or the mesio-incisal angle?

Answer 30

mesio-incisal angle

Question 31

Do the lateral or central incisors have a deeper palatal fossa?

Answer 31

maxillary lateral incisors

Question 32

How does the cingulum differ between the lateral and central incisors?

Answer 32

the lateral incisor is cingulum is narrower

Question 33

Do the lateral or central incisors have more chance of palatal pits forming?

Answer 33

the lateral incisors form grooves and risks of caries

Question 34

What is a palatogingival groove?

Answer 34

They originate in the lingual pit and extend cervically towards gingiva. More common on the lateral incisor may extend onto root surface

Question 35

Where does the palatogingival groove usually originate?

Answer 35

the palatal pit

Question 36

Compare the maxillary lateral and central incisors from a proximal point of view?

Answer 36

The same MAXILLARY LATERAL INCISORS SHOWN

Question 37

Describe the labial surface of the lateral incisor

Answer 37

more rounded labial surface than 1s

Question 38

Compare the lateral and central incisor's cingulum distally

Answer 38

central - displaced lateral - central (due to narrower surface)

Question 39

Name structures A-G of the maxillary lateral incisors

Answer 39