Mandibular central Incisor

Question 1

Common Traits to All Incisors

Answer 1

Rectangular in shape- longer than they are wide

Taper from proximal to cervical

More convex distal surface than mesial

Mesioincial angle is more square than disto incisal angle

Distal contact more cervical than mesial

Roots taper toward the apex and lingual

Roots are wider faciolingually- except maxillary central = symmetrical

Roots are longer than crown and can bend to distal

Question 2

Common Traits to All Incisors

Answer 2

Crowns taper from proximal contact towards lingual

Mesial and distal marginal ridges converge on cingulum

Cervical lines on Facial and Lingual curve upwards towards the apex

Proximal CEJ curve towards incisal and greater on mesial

Wedge shaped proximal outline

Facial and Lingual height of contour is in the cervical third

S shaped lingual outline- when viewed from proximal angles

Facial is less convex than lingual (view it from the incisal aspect)

Question 3

Statistics of Mandibular Central Incisor:

Answer 3

First, list out all of the stats of the maxillary central incisors and maxillary lateral incisors before moving on!

Question 4

CHANGE UP: FL MD

Answer 4

Facial Lingual Width is Greater than the Mesial Distal Width (as compared to what was seen in the maxillary centrals and laterals) – This just doesn’t apply to the crowns, but also with the ROOTS!

Question 5

First calcification

Answer 5

3-4 months

Question 6

enamel completion

Answer 6

4-5 years

Question 7

eruption

Answer 7

6-7 years

Question 8

root completion

Answer 8

8-9 years

Question 9

crown vs root

Answer 9

The root is longer than the crown!

Question 10

Bisecting Line

Answer 10

The incisal edge is LINGUAL to a bisecting line!- To remember, occlude, and notice how your bottom teeth are behind your top teeth? Thus, supports this claim.

May have more than one canal with multiple foramen

Question 11

Bisecting Line

Answer 11

The incisal edge is LINGUAL to a bisecting line!- To remember, occlude, and notice how your bottom teeth are behind your top teeth? Thus, supports this claim.

May have more than one canal with multiple foramen

Question 12

Facial

Answer 12

Cervical 1/3

Question 13

lingual

Answer 13

c 1/3

Question 14

mesial

Answer 14

I 1/3

Question 15

distal

Answer 15

I 1/3

Question 16

Facts about mandibular centrals

Answer 16

Relatively Smooth/Flat Labial Surface!

Mamelons are usually present but diminish over time with wear!

Very symmetrical

Mesial curvature of the CEJ is greater than the distal

Proximal-incisal angles are nearly symmetrical and only slightly rounded

Question 17

What type of shape is the root?

Answer 17

A ribbon shaped root, facial-lingual is wider on the crown as well as on the root!

Question 18

What type of shape is the root?

Answer 18

A ribbon shaped root, facial-lingual is wider on the crown as well as on the root!

Question 19

More Info

Answer 19

Lingual surface is smooth and shallow- feel with back of tongue

Cingulum is small and centered

LONGITUDINAL Root depressions on both mesial and distal

Root is more narrow on lingual than facial- dont focus on that too much, just know that it has a larger width F-L > M-D

Question 20

Pulp Anatomy

Answer 20

Takes the form of an I beam

Question 21

Weird Facts to know

Answer 21

Incisal edge is straight across from mesial to distal

Lingual surface is smooth but has inconspicuous marginal ridges