primary dentition

Question 1

Primary dentition order of eruption

Answer 1

Incisors (generally centrals then laterals), 1st molars, canines, 2nd molars
Mandibulars before maxillary

Question 2

Order of exfoliation

Answer 2

Incisors, 1st molars, canines, 2nd molars
Mandibular before maxillaries
(same order as eruption)

Question 3

primary teeth are completely finished for ____ years before root resorption begins

Answer 3

1-2 years

Question 4

Describe the mammelons on primary incisors

Answer 4

NON-EXISTENT! mammelons only present on permanent incisors

Question 5

Describe the deciduous teeth crown size in general

Answer 5

“squattier” than permanents, so wider in comparison length than permanents are

Question 6

Roots of anteriors are ____ and _____ comparatively, than permanents

Answer 6

narrower and longer

Question 7

Roots of molars are ___ and ____ than permanents

Answer 7

longer, and more flared. So the permanents can develop between them.

Question 8

Cervical ridges are more or less prominent than permanents?

Answer 8

more prominent, In general they look a lot more bulky cervically than permanents

Question 9

Which look whiter, permanent or deciduous teeth? Why?

Answer 9

deciduous teeth are whiter, because they’re less pigmented

Question 10

enamel on primary teeth is:

Answer 10

Thin, but with a more consistent depth than permanents

Question 11

dentin in primary teeth is:

Answer 11

thin, so pulp chambers and canals are generally bigger.

Question 12

Describe the roots of primary molars

Answer 12

More flared / further apart than permanents

Question 13

Primary maxillary central incisors are greater in the mesio-distal or cervicoincisal?

Answer 13

Mesiodistal is greater than cervicoincisal (squattier looking)
This is opposite of their permanent counterparts

Question 14

Deciduous maxillary laterals are greater in the mesio-distal or cervicoincisal?

Answer 14

cervicoincisal is greater

This is flip-flopped from the centrals right next door to them.

Question 15

what are the 3 lingual ridges on deciduous canines?

Answer 15

cingulum (connected to cusp tip by the tubercle)
mesial marginal ridge
distal marginal ridge

Question 16

deciduous maxillary canine:

cusp tip is ____ to the center of the crown

Answer 16

distal
So the mesial cusp slope is longer than the distal
This is opposite from the mandibular deciduous canines

Question 17

deciduous mandibular canine:

cusp tip is ____ to the center of the crown

Answer 17

mesial
So the distal cusp slope is longer than the mesial
This is opposite from the maxillary deciduous canines

Question 18

Mixed dentition begins with what tooth?

Answer 18

Mandibular 1st permanent molar

Question 19

Are permanent maxillary and mandibular molars succedaneous teeth?

Answer 19

NO - because they do not replace any teeth. The primary molars are replaced by pre-molars in the adult

Question 20

how many developmental lobes make up each tooth, including the anterior teeth?

Answer 20

4

Question 21

follicles of developing incisors and canines are where in relation to the primary teeth they are replacing?

Answer 21

lingual

Question 22

What is the detailed emerging sequence for the permanent dentition?

Answer 22

1st molars
mandibular central incisors
mandibular lateral incisors
maxillary centrals
maxillary laterals
1st premolars
mandibular canines
2nd premolars
maxillary canines
2nd molars
3rd molars

Question 23

is the pulp chamber in primary teeth and young primary teeth bigger or smaller than in older permanent teeth?

Answer 23

bigger - pulp chamber gets relatively smaller with age