Sr Sr
Characteristics Mandibular Central Incisor Characteristics Mandibular Lateral Incisor
no no
1 General characteristics 1 General characteristics
1a Arch Position >Adjacent to the midline 1a Arch Position >Second tooth from the midline
>Mesial Contact: Each other in each lower quadrant
>Distal Contact: Lateral Incisor >Mesial contact: central incisor
>Distal contact: canine
1b Universal >Mandibular right central incisor : #25 1b Universal >Right lateral incisor #26
Number >Mandibular left cental incisor: #24 Number
>Left lateral incisor # 23
1c General form >Normally narrowest mesiodistally. 1c General form >Slightly larger in all respect
and function >Smallest crown size of all permanent and function than mandibular central incisor
teeth
>Function: biting ,cutting, incising
shearing
2 Developmental >Initiation of calcification: 2 Developmental >Initiation of calcification:
Table 3 to 4 months Table 3 to 4 months
>Completion of enamel: >Completion of enamal:
4 to 5 years 4 to 5 years
>Eruption: >Eruption:
6 to 7 years 7 to 8 years
>Completion of root: >Completion of root:
9 years 10 years
3 Labial Aspect 3a Labial Aspect
3a Mesial outline >Mesial margin normally tapers >The incisal margin may slope
evenly toward the gingival in nearly slightly gingivally toward the
straight line. distal ,which results in a
>Mesioincisal angle is quite sharp distoincisal angle that is more
>Hight of contour is in the incisal third rounded than the same angle of
the cental incisor
>The contact area on this distal
3b Distal outline >Distally the outline is straight and is more cervically located than
mostly exactly like the mesial outline on the mesial outline ,thus
with similarly creating more cervically located
>sharp distoincisal angle height of contour on distal
>The height of contour is also in the outline
incisal third >Both height of contour are still
in the incisal third
3c Incisal Outline >Mamelons might be present in
number of 3 but wear off with time
>The incisal outline straight and at
right angle to the long axis of the
tooth
3d Cervical Outline >The cervical line is symmetrically
curved toward the root
Characteristics Mandibular Central Incisor Characteristics Mandibular Lateral Incisor
no no
1 General characteristics 1 General characteristics
1a Arch Position >Adjacent to the midline 1a Arch Position >Second tooth from the midline
>Mesial Contact: Each other in each lower quadrant
>Distal Contact: Lateral Incisor >Mesial contact: central incisor
>Distal contact: canine
1b Universal >Mandibular right central incisor : #25 1b Universal >Right lateral incisor #26
Number >Mandibular left cental incisor: #24 Number
>Left lateral incisor # 23
1c General form >Normally narrowest mesiodistally. 1c General form >Slightly larger in all respect
and function >Smallest crown size of all permanent and function than mandibular central incisor
teeth
>Function: biting ,cutting, incising
shearing
2 Developmental >Initiation of calcification: 2 Developmental >Initiation of calcification:
Table 3 to 4 months Table 3 to 4 months
>Completion of enamel: >Completion of enamal:
4 to 5 years 4 to 5 years
>Eruption: >Eruption:
6 to 7 years 7 to 8 years
>Completion of root: >Completion of root:
9 years 10 years
3 Labial Aspect 3a Labial Aspect
3a Mesial outline >Mesial margin normally tapers >The incisal margin may slope
evenly toward the gingival in nearly slightly gingivally toward the
straight line. distal ,which results in a
>Mesioincisal angle is quite sharp distoincisal angle that is more
>Hight of contour is in the incisal third rounded than the same angle of
the cental incisor
>The contact area on this distal
3b Distal outline >Distally the outline is straight and is more cervically located than
mostly exactly like the mesial outline on the mesial outline ,thus
with similarly creating more cervically located
>sharp distoincisal angle height of contour on distal
>The height of contour is also in the outline
incisal third >Both height of contour are still
in the incisal third
3c Incisal Outline >Mamelons might be present in
number of 3 but wear off with time
>The incisal outline straight and at
right angle to the long axis of the
tooth
3d Cervical Outline >The cervical line is symmetrically
curved toward the root
