Dental Anatomy Primary Dentition Flashcards
primary teeth are _(more/less)_ mineralized than permanent teeth, and are consequently _(more/less)_ worn
less mineralized, more worn
the difference in space from the primary to the permanent dentition is ___mm
2-4mm
mamelons that remain beyond the age of 10 generally indicate what type of bite pattern?
open bite
calcification of primary roots in normally completed by age ___
3-4 years
what is the usual pattern of eruption for primary teeth?
- centrals, laterals, 1st molars, canines, 2nd molars
- front to back except canine
- lowers before uppers except laterals
- girls before boys
- slim before stocky
where does the primate space develop in maxillary primary dentition? what about mandibular primate space?
- maxillary - between lateral and canine
- mandibular - between the canine and the 1st molar
what is the most frequent cause of primary spacing for the anterior teeth?
growth of the dental arches
the direction of primary enamel rods in the cervical 3rd is in what direction? what about permanent?
- primary - occlusal direction
- permanent - apical direction
primary molar roots are _(more/less)_ divergent than permanent molar roots
more
do primary or permanent molars lack identifiable root trunks?
primary
which primary tooth has the smallest faciolingual crown dimension?
primary mandibular central incisor
which primary tooth is the most bilaterally symmetrical?
mandibular central incisor (same for permanent dentition)
in delayed resorption of primary incisors, the permanent incisors usually eruption in what direction?
lingual
the primary central incisor has a prominent cervical ridge on what locations?
both the facial and lingual surfaces
from the facial view, the crown of a primary canine has a mesial cusp ridge that is _(longer/shorter)_ than the distal cusp ridge
longer
this means that the cusp tip will be offset to the distal
the primary maxillary 1st molar has a crown that somewhat resembles what permanent tooth?
a premolar
the primary maxillary 1st molar has roots that resemble what permanent tooth?
maxillary molar
which primary maxillary tooth has the most prominent cervical ridge, and what surface is it on?
maxillary 1st molar on the MF surface
which primary tooth generally has an oblique ridge?
maxillary 2nd molar
the primary maxillary 2nd molar is the only primary posterior tooth to have what 3 things?
- oblique ridge
- transverse ridge (primary mandibular 1st molar has this as well)
- DL groove
the primary ___ molar generally exhibits a cusp of carabelli
maxillary 2nd molar
what are the last primary teeth to erupt?
maxillary 2nd molars
the primary maxillary 2nd molar exhibits _(more/less)_ cusps than the primary maxillary 1st molar
more
the primary maxillary 2nd molar most resembles what permanent tooth?
maxillary 1st molar
the primary tooth that has the most distinctly prominenet facial cervical ridge is the ___
mandibular 1st molar
(vs maxillary 1st molar, which has the most prominent cervical ridge of the maxillary teeth only)
from the facial view of a primary mandibular 1st molar, the CEJ is most apically positioned in what area?
the mesial 3rd
this is a result of its prominent facial cervical ridge
the primary mandibular 1st molar usually exhibits a _(mesial/distal)_ triangular fossa
distal
which primary tooth has the most distinct transverse ridge?
mandibular 1st molar
what permanent tooth does the primary mandibular 1st molar resemble?
none
which primary teeth differ most from permanent teeth?
mandibular 1st molars
which cusp is the highest and sharpest on a primary mandibular 1st molar?
ML
