mandibular incisor Flashcards
covered by enamel vs covered by cemenum
anatomic crown vs. anatomic root
The portion of a tooth that is above the gingival margin.
Clinical Crown
Narrowest and shortest of all permanent teeth
Mandibular Central Incisor
Mandibular Central Incisor
Crown to root ratio approaching one to one
single canal from crown to apex
type 1 vertuccir
pulp separates in two near the crown and joins back together at apex to form one root canal
type 2 vertucci classification
root separate into 2 distinct canals and extends to root apex separately
type 4 vertucci
starts as one root canal in pulp chamber and divides into 2 as it reaches apical foramen
type 3 vertucci
slightly larger in all dimensions than central incisor and not bilaterally symmetric
Mandibular Lateral Incisor
Crown is bilaterally symmetrical (mesial and distal halves are almost identical)
Mandibular Central Incisor
tf Mandibular Central Incisor
dont have mamelon
f
Mamelons when newly erupted
Mandibular Central Incisor
Incisal edge straight; —– to long axis of tooth
Incisal edge straight; perpendicular to long axis of tooth
tf Mandibular Central Incisor;
round MI and DI angles
Sharp MI and DI angles (~90°)
tf Mandibular Central Incisor
Facial surface quite rough
F
Facial surface quite smooth
correct the statement
Mandibular Central Incisor Root long , straight, spherical, very wide mesiodistally
Mandibular Central Incisor Root short, straight, conical, very narrow mesiodistally
Relatively smooth lingual aspect of Mandibular Central Incisor
T
Mandibular Central Incisor–>
Crown tapers to the lingual on lingual surface
(not root)
T
Mandibular Central Incisor–>
Crown tapers to the lingual (not root)
max incisors have Less prominent cingulum, marginal ridges, and lingual fossa than Mandibular Central Incisor
F
Mandibular Central Incisor have
Less prominent cingulum, marginal ridges, and lingual fossa than maxillary incisors
Mandibular Central Incisor;
Incisal edge slightly lingual to bisecting line(mesial aspect)
T
Maxillary Central Incisor
triangular or wedge shaped
tf Mandibular Central Incisor
have Pronounced CEJ line (less than maxillary central)
t
S – shaped on lingual (slightly convex cingulum; slightly concave fossa)
Mandibular Central Incisor
Root broad faciolingually
Mandibular Central Incisor
Mandibular Central Incisor distal aspect
CEJ less pronounced than mesial
Incisal edge straight and slightly lingual to center
Mandibular Central Incisor
Incisal edge perpendicular to faciolingual bisecting line
Mandibular Central Incisor
tf mandib. facial incisor is Wider mesiodistally than
faciolingually
f
Wider faciolingually than mesiodistally
tf central mandib incisor have a trapezoidal shape
f
Roughly triangular crown outline form
tf Mandibular Central Incisor
Cingulum centered but may be slightly offset distally
T
Mesial and distal portions symmetrical
Mandibular Central Incisor incisal view
Single, short, and straight
root of Mandibular Central Incisor
Narrow mesiodistally
Broad faciolingually
root of
Mandibular Central Incisor
narrow, elongated ribbon shaped pulp
Cervical cross-section of Mandibular Central Incisor
tf Mandibular Central Incisor have only one pulp canal
f Often two pulp canals
(one facial, one lingual)
Hour glass shape
Mandibular Central Incisor
Mandibular Central Incisor
Narrow mesiodistally
Broad faciolingually
tf Mandibular Central Incisor only have mesial root concavities
f
Mandibular Central Incisor
Usually mesial and distal root concavities
facial and lingual pulp canal
Mandibular Central Incisor
Erupts at age 7-8
Mandibular Lateral Incisor
tf Mandibular Lateral Incisor isnt bilat symmtericall
T
Tf Mandib. Central incisors slightly larger in all dimensions than Mandibular Lateral Incisor
f
Mandibular Lateral Incisor slightly larger in all dimensions
facial aspect of Mandibular Lateral Incisor
Incisal edge slopes gingivally toward distal
tf Mandibular Lateral Incisor
MI angle slightly more rounded than DI angle
Mandibular Lateral Incisor
DI angle slightly more rounded than MI angle
tf
Mandibular Lateral Incisor(facial view)
Mesial outline straighter than distal outline
T
tf
Root apex may curve mesially in Mandibular Lateral Incisor
f distally
Facial surface smooth and flat in the incisal 2/3
Mandibular Lateral Incisor
smooth surface lingual anatomy
Mandibular Lateral and central Incisor
Cingulum is slightly distal to the center of the crown
Mandibular Lateral Incisor
Crown tapers towards lingual
Mandibular Lateral Incisor
tf in
Mandibular Lateral Incisor
Distal marginal ridge is slightly shorter than mesial marginal ridge due to slope
t
CEJ line less pronounced
Mandibular Lateral Incisor< central incisor
facial HOC and lingual HOC in cervical third
mandibular lateral and central incisor
incisal edge lingual to bisecting line(mesial aspect)
mandib. central and lat incisor
root broad faciolingually and concavity present on mesial surface
mandib lateral incisor
CEJ line less curved than mesial
Mandibular Lateral Incisor
(distal view)
distal surface is shorter incisogingivally than mesial surface
Mandibular Lateral Incisor
Mandibular Lateral Incisor
crown is “twisted”
More of incisal ridge and facial surface shows from distal aspect
on Mandibular Lateral Incisor
deep concavity on distal surface
Mandibular Lateral Incisor
Root short, straight, conical, very narrow mesiodistally
Mandibular Central and lateral Incisor
Crown appears as if twisted at its base
Mandibular Lateral Incisor(incisal view)
tf
Mandibular Lateral Incisor
Incisal edge not perpendicular to faciolingual bisecting line;
F
Incisal edge not perpendicular to faciolingual bisecting line;
distal aspect of incisal edge more lingually positioned in
Mandibular Lateral Incisor
Mandibular Lateral Incisor
Cingulum more noticeably displaced toward the distal
central incisor root; may incline distally
root of Mandibular Lateral Incisor
May have shallower root concavities on mesial and distal
Mandibular Lateral Incisor
Mandibular Lateral Incisor
cervical cross section
longer faciolingualy than distal mesially
