mandibular incisors (both)

Question 1

Which is bigger, the central or lateral mandibular incisor?

Answer 1

The laterals are bigger. It’s the opposite in maxillary incisors though.

Question 2

Where are the contact ridges for each of the mandibular incisors?

Answer 2

All are near the incisal ridges, and all at about the same level

Question 3

Describe the orientation of the crown, from a mesial aspect.

Answer 3

Labial surfaces are inclined lingually, or on the lingual side of a bisecting line

Question 4

General mesiodistal dimensions of the mandibular incisors?

Answer 4

They are the smallest, mesiodistally, of any teeth

Question 5

Describe the root of the mandibular central

Answer 5

Narrow mesio-distally, wide labio-lingually,

almost like a tall “shark-fin” look, with a developmental depression in the middle of the root

Question 6

Slight bumps often present on the incisal edge of all permanent incisors are called:

Answer 6

mammelons

Question 7

For the mandibular central, is the curvature of the cervical line (CEJ) greater on the mesial or distal?

Answer 7

mesial is greater, by ~ 1mm

Question 8

from an incisal view, are your mandicular centrals symmetrical? are your laterals?

Answer 8

incisally, centrals ARE bilaterally symmetrical, laterals are not.

Question 9

describe the pulpal sections of the mandibular centrals

Answer 9

large pulp chamber, tapering to apex, narrow pulp canals & often ribbon-like. Sometimes splits into 2 canals.

Question 10

generally lateral mandibular incisors resemble the centrals EXCEPT they:

Answer 10

• are slightly larger than centrals (opposite in maxillary incisors)
• angled on the distal towards the posterior (turning with your arch), hence not symmetrical like centrals
• Root is longer than the centrals