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Mandibular Lateral Incisors
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Terms in this set (14)
MDB lateral incisors are slightly ____ than centrals.
slightly larger
How many roots, lobes, and pulp horns in MDB LI?
1 root, 4 lobes, 2-3 horns
True/False: While the MDB centrals have sharp distoincisal angles, the laterals have rounded ones.
True
The lingual aspect of a MDB lateral incisor may have a deep but short ____ groove.
cervicoincisal groove
Which aspect can you use to differentiate left and right MDB laterals?
The incisal aspect. The incisal edge is twisted towards the distal edge. {So looking at the incisal edge, the distal part is more lingual than the mesial part of it}
In which mandibular anterior can the distal marginal ridge be seen from the mesial view?
MDB Lateral Incisor (b/c the crown twists distally)
Which tooth is wider mesiodistally, the MDB CI or LI?
The MDB lateral incisor is wider MD than the central.
NUMBERS: Cervicoincisal length of crown of MDB LI? Length of root?
9.5 crown (just like central)
14.0 root (longer than central [12.5])
NUMBERS: MD diameter of crown of MDB LI? What about at the cervix?
5.5 MD
4.0 at cervix
Note that these are both 0.5 larger than the central
NUMBERS: FL diameter of crown of MDB LI? What about at the cervix?
6.5 FL
5.8 at cervix
Note that these are both 0.5 larger than the central
NUMBERS: Curvature of the CEJ mesially and distally of MDB LI?
3.0 mesially
2.0 distally
These are the same as the central
NUMBERS: When does the MDB LI erupt? When is the root completed?
Erupts: 7-8 yr
Root completed: 10 yr
These are the same as the MXL central incisor
NUMBERS: When is the first evidence of calcification of a MDB LI? When is the enamel completed?
First evidence of calcification: 3-4 mo
Enamel completed: 4-5 yr
These are the same as the MXL CI and MDB CI (MXL LI first evidence of calcification is 10-12 mo)
ERUPTION: The MDB LI is the ____ tooth to erupt in the MDB arch.
3rd, at 7-8 yr.
MDB: 1st M, CI, LI, Ca, 1st PM, 2nd PM, 2nd M, 3rd M
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