Final Incisors

Question 1

incisor crown shape from facial view? What is longest dimension

Answer 1

rectangular

*longer incisogingivally than mesiodistally

Question 2

crowns taper in what direction from facial view?

Answer 2

from contact areas to cervical lines

Question 3

crown outlines on the distal are more ____ than mesial? Exception

Answer 3

convex

*exception on mandibular central incisor (known for their symmetry)

Question 4

mesioincisal angles are?
distoincisal angles are?
exception?

Answer 4

mesioincisal= acute or 90 degrees
distoincisal= obtuse or rounded
Exception is mandibular central incisor where both the mesial and distal angles are similar

Question 5

mesial contact areas?

distal contact areas?

Answer 5

mesial= incisal third
distal= more cervical
Exception= mand central incisor have mesial and distal contacts at the same height

Question 6

roots taper what direction?

Answer 6

from cervical line to apex and facial to lingual

Question 7

roots are wider?

Answer 7

faciolingually then mesiodistally except mandibular central

Question 8

when bent, root are often bend?

Answer 8

distally in the apical third

Question 9

roots are slghtly to consideraby longer?

Answer 9

roughly same= max central

roots much longer= max lateral

Question 10

incisal veiw, crowns taper?

Answer 10

from proximal contact to lingual

Question 11

the mesial and distal marginal ridges converge?

Answer 11

towards the cingulum

Question 12

what is the proximal outline of incisors?

Answer 12

wedge or triangular shape

Question 13

facial and lingual crests of curvature are in the?

Answer 13

cervical third

Question 14

proximal cervical lines are?

curve more on mesial or distal?

Answer 14

convex, curve towards incisal

*curve more on mesial

Question 15

what is the shape of lingual outline?

Answer 15

S-shaped with a concave lingual fossa and marginal ridge. Convex cingulum

Question 16

incisal edges terminate mesially and distally at? (incisal view)

Answer 16

the widest portion of the tooth and crown

Question 17

facial outlines compared to lingual outliens

Answer 17

facial outlines are more broadly outlined than lingual

Question 18

incisal edges slope shorter where? except?

Answer 18

on the distal EXCEPT on symmetrical mandibular incisors which have no slope

Question 19

Do incisors have fossa?

Answer 19

yes, a lingual fossa located between marginal ridges, ore evident on maxillary incisors

Question 20

crowns of both maxillary incisors are longer? which one is more oblong?

Answer 20

cervicoincisally then mesiodistally

*laterals are more oblong

Question 21

the lateral or central incisors have more rounded corners from facial veiw?

Answer 21

lateral

Question 22

incisal edges slope?

Answer 22

cervically on the distal; more so on laterals

Question 23

how are the cingula orientated?

Answer 23

central= off center to distal
lateral= centered

Question 24

mesial marginal ridges of maxillary incisors are ____ then the distal? why?

Answer 24

longer. longer on centrals due to the distally displaced cingulum; longer on laterals due to the cervical slope of the incisal edge to the distal

Question 25

centrals or laterals have a wider MD dimension than FL?

Answer 25

central = rectangular shape
lateral= nearly equal= square

Question 26

what is the most symmetrical tooth in the mouth?

Answer 26

mandibular central incisors

Question 27

where are the proximal contacts on mandibular incisors?

Answer 27

central= same level
lateral= the distal is more apical than the mesial

Question 28

mandibular lateral incisors have a ______ twist?

Answer 28

distolingual twist. (mand central have their incisal edges at right angles)

Question 29

the crowns of the mandibular lateral incisor tip?

Answer 29

to the distal relative to the root accentuated by the fact that the incisal edges slope cervically toward the distal

Question 30

lingual fossa are more pronounced on max or mand?

Answer 30

max; often with a lingual pit

**mandibular incisors have smoother lingual anatomy without grooves or pits

Question 31

the max central or lateral is more likely to have a lingual pit?

Answer 31

lateral

Question 32

in cross section, what is the shape of max central and lateral incisor roots?

Answer 32

mandibular= ribbon like (thin MD, long FL)
max= round

Question 33

incisal edges of max and mand are labial or lingual?

Answer 33

max= labial

mand=lingual

Question 34

mandibular or maxillary are longer MD?

Answer 34

max are MUCH longer and larger MD

Question 35

mandibular or maxillary have flatter mesial/distal outliens?

Answer 35

mandibular

Question 36

Max distal contacts are more _____ positioned than mesial contacts EXCEPT?

Answer 36

DISTAL more cervical than mesial EXCEPT Max laterals which are in the middle third

Question 37

mandibular incisors are usually wider in what dimension?

Answer 37

wider FL than MD