primary dentition Flashcards
Primary dentition order of eruption
Incisors (generally centrals then laterals), 1st molars, canines, 2nd molars
Mandibulars before maxillary
Order of exfoliation
Incisors, 1st molars, canines, 2nd molars
Mandibular before maxillaries
(same order as eruption)
primary teeth are completely finished for ____ years before root resorption begins
1-2 years
Describe the mammelons on primary incisors
NON-EXISTENT! mammelons only present on permanent incisors
Describe the deciduous teeth crown size in general
“squattier” than permanents, so wider in comparison length than permanents are
Roots of anteriors are ____ and _____ comparatively, than permanents
narrower and longer
Roots of molars are ___ and ____ than permanents
longer, and more flared. So the permanents can develop between them.
Cervical ridges are more or less prominent than permanents?
more prominent, In general they look a lot more bulky cervically than permanents
Which look whiter, permanent or deciduous teeth? Why?
deciduous teeth are whiter, because they’re less pigmented
enamel on primary teeth is:
Thin, but with a more consistent depth than permanents
dentin in primary teeth is:
thin, so pulp chambers and canals are generally bigger.
Describe the roots of primary molars
More flared / further apart than permanents
Primary maxillary central incisors are greater in the mesio-distal or cervicoincisal?
Mesiodistal is greater than cervicoincisal (squattier looking)
This is opposite of their permanent counterparts
Deciduous maxillary laterals are greater in the mesio-distal or cervicoincisal?
cervicoincisal is greater
This is flip-flopped from the centrals right next door to them.
what are the 3 lingual ridges on deciduous canines?
cingulum (connected to cusp tip by the tubercle)
mesial marginal ridge
distal marginal ridge
deciduous maxillary canine:
cusp tip is ____ to the center of the crown
distal
So the mesial cusp slope is longer than the distal
This is opposite from the mandibular deciduous canines
deciduous mandibular canine:
cusp tip is ____ to the center of the crown
mesial
So the distal cusp slope is longer than the mesial
This is opposite from the maxillary deciduous canines
Mixed dentition begins with what tooth?
Mandibular 1st permanent molar
Are permanent maxillary and mandibular molars succedaneous teeth?
NO - because they do not replace any teeth. The primary molars are replaced by pre-molars in the adult
how many developmental lobes make up each tooth, including the anterior teeth?
4
follicles of developing incisors and canines are where in relation to the primary teeth they are replacing?
lingual
What is the detailed emerging sequence for the permanent dentition?
1st molars mandibular central incisors mandibular lateral incisors maxillary centrals maxillary laterals 1st premolars mandibular canines 2nd premolars maxillary canines 2nd molars 3rd molars
is the pulp chamber in primary teeth and young primary teeth bigger or smaller than in older permanent teeth?
bigger - pulp chamber gets relatively smaller with age