Maxillary Lateral Incisor

Question 1

From facial & lingual views, generally, what is the crown shape of the maxillary lateral incisors? Due to its great variation what are alternative shapes?

Answer 1

Trapezoid is the most common shape.

Oval and Elliptical shapes are also seen. Lateral incisors are usually more round than Central Incisors.

Question 2

From facial & lingual views, what is the mesial outline shape of the maxillary lateral incisors? How does it compare to the distal outline?

Answer 2

Convex with rounded MI angle.

Less round than distal outline.

Question 3

From facial & lingual views, what is the distal outline shape of the maxillary lateral incisors? How does it compare to the mesial outline?

Answer 3

More rounded than mesial outline; rounded DI angle.

Question 4

Eruption of maxillary lateral incisors?

Answer 4

8-9 years

Question 5

In maxillary lateral incisors, what is longer, the incisocervical crown dimension or the mesiodistal dimension?

Answer 5

Incisocervical (top to bottom) is longer

Question 6

In maxillary lateral incisors, root tips bend (dilacerate), in which direction?

Answer 6

Distal

Question 7

The incisal edge of the maxillary lateral incisor curves in which direction?

Answer 7

The incisal edge slants gingivally (down) in the distal 1/3

Question 8

In maxillary lateral incisors, how many mammelons (bumps on incisal edge) are present upon eruption?

Answer 8

Two. Central incisors have 3.

Question 9

What is the height of contour (contact location) of the mesial edge of the maxillary lateral incisors?

Answer 9

The junction of the incisal, and middle 1/3

Question 10

What is the height of contour (contact location) of the distal edge of the maxillary lateral incisors?

Answer 10

Middle 1/3

Question 11

For maxillary lateral incisors which edge, distal or mesial, is more rounded?

Answer 11

The Distal outline of the crown is more rounded than the mesial. The distoincisal corner is lower and more round than the mesioincisal corner.

Question 12

In maxillary lateral incisors, what is the root shape? How many?

Answer 12

Single conical root

Question 13

In maxillary lateral incisors, what is the crown shape from the mesial view?

Answer 13

Wege or triangular.

Question 14

In maxillary lateral incisors, what is the facial outline shape from the mesial view?

Answer 14

Convex (moderately); flatter than central incisor

Question 15

In maxillary lateral incisors, what is the facial (buccal) height of contour?

Answer 15

cervical (lower) 1/3

Question 16

In maxillary lateral incisors, what is the lingual height of contour?

Answer 16

Cervical 1/3

Question 17

In maxillary lateral incisors, the lingual outline shape is?

Answer 17

Concave middle and incisal 1/3s (lingual fossa) & convex cervical 1/3

Question 18

In maxillary lateral incisors, what structure contributes to the possibility of class I caries?

Answer 18

the lingual pit at the incisal edge of the cingulum.

Question 19

In maxillary lateral incisors, what is the centered, convex structure on the lingual surface just cervical to the lingual fossa?

Answer 19

The cingulum.

Question 20

Which tooth has a more defined and deeper lingual fossa, the central or lateral maxillary incisors?

Answer 20

Lateral maxillary incisors

Question 21

In maxillary lateral incisors, does the distal or mesial side have more incisal curvature of the CEJ?

Answer 21

The mesial CEJ has more incisal curvature

Question 22

In maxillary lateral incisors, what is the tooth shape from the incisal view?

Answer 22

Triangular, with a longer, rounded (convex) facial side and a tapered/rounded (convex) cingulum on the lingual side.

Question 23

In maxillary lateral incisors, where is the contact location buccolingually?

Answer 23

It is centered both mesial and distally

Question 24

How does the root length compare b/t lateral and central maxillary incisors?

Answer 24

They are about the same length

Question 25

In maxillary lateral incisors, what is the shape, in cross section, of the root and pulp chamber?

Answer 25

Triangular.

Question 26

In maxillary lateral incisors, how many lobes are present?

Answer 26

4; 3 facial and 1 lingual. Same as central incisor.

Question 27

Which tooth has the greatest variation in tooth morphology?

Answer 27

Lateral maxillary incisors; Variations in the crown shape (roundness), cingulum (linguogingival fissure may descend from lingual pit through cingulum), and presence (often congenitally missing or seen as peg).