Permanent Mandibular Incisors

Question 1

how does the mandibular central incisor compare to all other teeth with respect to its size?

Answer 1

it is the smallest of all the teeth

Question 2

the crown of the mandibular central incisor has slightly ___ than half the mesiodistal diameter of the maxillary central incisor

Answer 2

more

Question 3

the mandibular central incisor’s labiolingual dimension is __mm less than the maxillary central

Answer 3

1mm

Question 4

masticatory stress on the mandibular central incisor is in a ___ direction and aids in ___

Answer 4

• labiolingual
• reinforcement

Question 5

the mandibular central incisor’s root is narrow ___ and wide ___

Answer 5

• mesiodistal
• labiolingual

Question 6

the mandibular central incisor’s root length is as great, if not longer, than the ____

Answer 6

maxillary central incisor

Question 7

the incisal ridge of the mandibular central incisor is ___, and at ___ angles to the long axis of the root

Answer 7

• straight
• right angles

Question 8

the mesial and distal outlines of the mandibular central incisor drop straight down to ___, and taper evenly to ___

Answer 8

• contact areas
• cervix

Question 9

the mesial and distal outlines of the mandibular central incisor root are fairly ___ to apical areas, with a slight curve to ___

Answer 9

• straight
• distal

Question 10

the labial face of the mandibular central incisor is ___, with flattened surface at ___ third, and the ___ 3rd is convex

Answer 10

• smooth
• incisal
• middle

Question 11

the mandibular central incisor’s face at the cervix is more ___ along with the root

Answer 11

convex

Question 12

from the lingual aspect, the mandibular central incisor’s ligual surface is ___, with a slight ___ at the incisal third

Answer 12

• smooth
• concavity

Question 13

from the lingual aspect, the mandibular central incisor’s marginal ridges are almost ___, but are sometimes prominent near ___

Answer 13

• absent
• incisal

Question 14

from the lingual aspect, the mandibular central incisor’s surface is flat, and progresses to ___ at the cervical third

Answer 14

convexity

Question 15

from the lingual aspect, the mandibular central incisor shows ___ developmental grooves, along with the lateral

Answer 15

least

Question 16

from the lingual aspect, the mandibular central incisor outlines are ___

Answer 16

symmetrical

Question 17

from the mesial aspect, the mandibular central incisor’s labial face is straight above the ___

Answer 17

cervical curvature

Question 18

from the mesial aspect, the mandibular central incisor’s lingual outline is ___ with labial inclination above the ___

Answer 18

• straight
• cingulum

Question 19

from the mesial aspect, the mandibular central incisor is ___ at the middle third

Answer 19

concave

Question 20

from the mesial aspect, the mandibular central incisor’s incisal ridge is either ___ or ___, and is lingual to the center of the ___

Answer 20

• round
• worn flat
• root

Question 21

from the mesial aspect, the mandibular central incisor’s curvature of the cervical line is towards the ___, almost ___ the length of the crown

Answer 21

• incisal
• 1/3

Question 22

from the mesial aspect, the mandibular central incisor’s root outline is ___ from cervix through middle third, then ___ rapidly

Answer 22

• straight
• tapers

Question 23

from the mesial aspect, the mandibular central incisor’s root apex may be ___ or ___

Answer 23

blunt or pointed

Question 24

from the mesial aspect, the mandibular central incisor’s mesial surface is ___, smooth at ___, tending to concavity at the ___

Answer 24

• convex
• incisal third
• cervix

Question 25

from the mesial aspect, the mandibular central incisor’s mesial surface of the root is ___ below the cervical line

Answer 25

flat

Question 26

from the mesial aspect, the mandibular central incisor will usually have a broad developmental depression along ___

Answer 26

most of the root

Question 27

from the mesial aspect, the developmental depressions of mandibular central incisor roots are usually ___ at middle to apical thirds

Answer 27

deeper

Question 28

from the distal aspect, the mandibular central incisor’s curvature of the cervical line is about 1mm ___ than the mesial

Answer 28

less

Question 29

from the distal aspect, the mandibular central incisor’s distal surface of the crown and root are similar to ___

Answer 29

mesial

Question 30

from the distal aspect, the mandibular central incisor’s developmental depression on the distal may be more marked, with ___ at its center

Answer 30

developmental groove

Question 31

from the incisal aspect, the mandibular central incisor shows bilateral ___

Answer 31

symmetry

Question 32

from the incisal aspect, the mandibular central incisor’s mesial half is almost ___ to distal half

Answer 32

identical

Question 33

from the incisal aspect, the mandibular central incisor’s incisal edge is almost at ___ with labiolingual bisecting line

Answer 33

right angles

this is an important ID separating central and lateral

Question 34

from the incisal aspect, the mandibular central incisor’s labiolingual dimension is always ___ than mesiodistal

Answer 34

greater

Question 35

from the incisal aspect, the mandibular central incisor’s crown tapers to the ___, and the mesiodistal measurement is greater at the ___

Answer 35

• lingual
• labial

Question 36

the labiolingual section of the pulp chamber of the mandibular central incisor shows ___ pulp horns, with a ___ pulp chamber that tapers toward the ___

Answer 36

• well developed
• large
• apex

Question 37

the mesiodistal section of the pulp chamber of the mandibular central incisor shows a ___ cavity with ___ pulp horn (usually), and tapers to the ___

Answer 37

• narrow
• one
• apex

Question 38

in the mandibular central incisor, the root section of the pulp chamber is often ___-like, and sometimes ___ canals may be present

Answer 38

• ribbon
• two

Question 39

the mandibular lateral incisor resembles the central incisor, except it is somewhat ___ than the central

Answer 39

larger

Question 40

the mesial side of the mandibular lateral incisor crown is usually ___ than the distal

Answer 40

longer

Question 41

the incisal ridge of the mandibular lateral incisor slopes downward in a ___ direction

Answer 41

distal

Question 42

the distal contact area of the mandibular lateral incisor is more in a ___ direction

Answer 42

cervical

this allows the lateral to contact the canine

Question 43

the mandibular lateral incisor may have a deeper ___ above the cervical line on the ___

Answer 43

• concavity
• distal

Question 44

the root of the mandibular lateral incisor is usually considerably ___ than the cetral

Answer 44

longer

Question 45

the mandibular lateral incisor will have developmental depressions ___ and ___

Answer 45

mesially and distally

Question 46

from the incisal aspect, the mandibular lateral incisor ridge is not at right angles to ___, as is the central

Answer 46

bisecting line

Question 47

from the incisal aspect, the mandibular lateral incisor ridge or edge is curved to follow ___, giving the appearance of the crown being ___ on the root

Answer 47

• the curvature of the arch
• twisted

Question 48

form and function of the pulp chamber of the mandibular lateral incisor is similar to ___

Answer 48

mandibular central incisor