Mandibular Incisors

Question 1

inter proximal contact

Answer 1

where two adjacent teeth contact

Question 2

embrasures

Answer 2

the spaces/spillways that widen out from the contact

Question 3

anterior teeth have - embrasure spaces

Answer 3

4
incisal, gingival (cervical), facial, lingual
incisal

Question 4

posterior teeth have - embrasure spaces

Answer 4

4
occlusal, gingival (ceervical), facial, lingual
occlusal=gingival
facial

Question 5

purpose of the mandibular incisors

Answer 5

incise or cut food

Question 6

how many mandibular incisors are there?

Answer 6

4
2 central
2 lateral

Question 7

mandibular incisors have smaller — diameters than any other tooth

Answer 7

mesiodistal

Question 8

what is the smallest tooth?

Answer 8

mandibular central incisor

Question 9

is the central or lateral mandibular incisor smaller?

Answer 9

central

Question 10

mandibular incisors are broader — than —-

Answer 10

buccolingually (BL) than mesiodistally (MD)

Question 11

mandibular central incisor is — in outline

Answer 11

trapezoidal

tapers cervically

Question 12

the incisal outline of the mandibular central incisor is

Answer 12

straight

mamelons present when the tooth erupts

Question 13

the crown of the mandibular central incisor is approximately -x as long (IG) as wide (MD)

Answer 13

2x

Question 14

the mesial and distal outlines are straight up to the contact areas and taper to the

Answer 14

cervix

Question 15

mesioincisal and distoincisal line angles are sharp-

Answer 15

90 degrees

Question 16

the mandibular central incisor is often described as the only — tooth in the mouth

Answer 16

symmetrical

Question 17

where are the mesial and distal contract areas?

Answer 17

incisal 1/3

both contacts are at the same level

Question 18

from the facial view, the labial surfaces are smooth with no

Answer 18

developmental depressions

Question 19

the labial surface is flat in the icisal 1/3 and becomes more — cervically

Answer 19

convex

Question 20

how many roots?

Answer 20

single

narrow mesiodistally, curves distally in some cases

Question 21

us the tooth or crown longer?

Answer 21

root

Question 22

shape of the mandibular central incisor from the lingual view

Answer 22

trapezoidal in outline

smooth and rounded, slightly concave bu no distinct lingual fossa

Question 23

from the lingual view, the mesas and distal marginal ridges are only minor —

Answer 23

elevations

Question 24

the cingulum is much less distinct than the

Answer 24

maxillary incisors

Question 25

there are no --- --- from the lingual view

Answer 25

developmental grooves

Question 26

central incisor shape form the mesial view

Answer 26

triangular in outline

Question 27

from the mesial view, the labial outline is

Answer 27

curved (convex)

Question 28

the height of contour of the labial surface is in the

Answer 28

cervical 1/3

Question 29

the incisal edge lies ---to line bisecting the root

Answer 29

lingual

Question 30

when worn, the incisal edge angles to the

Answer 30

facial

Question 31

CEJ curves incisally about 1 mm more than on the

Answer 31

distal

Question 32

cervical line extends ~1 mm more apically on the

Answer 32

lingual than the labial

Question 33

Central Incisor: Mesial View: central incisors are broader

Answer 33

labiolingually than mesiodistally

Question 34

Central Incisor: Mesial View: crown may have a concavity below the middle 1/3 above the

Answer 34

cervical line

Question 35

Central Incisor: Mesial View: root extends straight from the CEJ and tapers

Answer 35

apically from the middle 1/3

Question 36

Central Incisor: Mesial View: root may have a broad developmental depression along

Answer 36

its length

Question 37

Central Incisor: Distal View: differences from mesial view (2)

Answer 37

cervical lines curve incisally 1 mm less than on mesial | developmental depression on distal of root is greater than on the mesial

Question 38

Central Incisor: Incisal View: symmetry of the tooth is obvious

Answer 38

mesial 1/2 and distal 1/2 of the tooth are almost identical

Question 39

Central Incisor: Incisal View: incisal edge is at right angles to a line directing the crown

Answer 39

labiolingually | incisal edge lies lingual to center of the tooth

Question 40

Central Incisor: Incisal View: tooth converges

Answer 40

lingually | the MD width of the labial surface is wider than the MD width of the lingual surface

Question 41

Central Incisor: Incisal View: contact areas are centered

Answer 41

faciolingually

Question 42

how many roots does the central incisor have?

Answer 42

single, one

Question 43

Central Incisor: Root & Pulp: | root is broader

Answer 43

FL than MD

Question 44

Central Incisor: Root & Pulp: | developmental depressions run

Answer 44

longitudinally down root on medial and distal

Question 45

Central Incisor: Root & Pulp: | distal depression is usually

Answer 45

deeper than mesial

Question 46

Central Incisor: Root & Pulp: | root is round/ovoid in cross section with

Answer 46

depressions on the mesial and distal