Primary Teeth

Question 1

What is the crown shape of all primary incisor?

Answer 1

Shovel-shape

Question 2

Are the primary central incisors larger mesiodistally or incisocervically?

Answer 2

Mesiodistally

Question 3

How are the developmental grooves on primary incisors?

Answer 3

Not-evident

Question 4

How does the distal cusp ridge compare to the mesial cusp ridge in primary canines

Answer 4

Distal cusp ridges is shorter than the mesial

Question 5

Are primary canines crowns longer mesiodistally or incisocervically?

Answer 5

crowns are as wide mesiodistally as they are incisocervically (i.e. about equal)

Question 6

What primary teeth are equivalent (or similar in crown shape and cusp number) to permanent teeth?

Answer 6

Primary Maxillary Second Molars (#A; J) are similar to the permanent maxillary first molars (#3, 14)
Primary Mandibular Second Molars (#K, T) are similar to the permanent maxillary first molars (#19, 30).

Question 7

How many cusps do primary 2nd mandibular molars have?

Answer 7

5 cusps

Question 8

What is the shape of all primary second molars?

Answer 8

Triangular shape

Question 9

What primary teeth are unique and different compared to all permanent teeth?

Answer 9

first molars (both mandible and maxilla)
#B, I, L, S

Question 10

What are the unique features of the mandibular first molar

Answer 10

Rectangular shape; very rounded line angles

Transverse Ridge

Question 11

What is unique about the cervical ridge in mandibular and maxillary first molars?

Answer 11

Very prominant MB cervical deflecting ridge. (i.e. the enamal extends onto the root

Question 12

What is the smallest cusp in the primary mandibular first molar?

Answer 12

DL cusp is the smallest if it is present. If DL cusp is not present then the DB cups is the smallest.

Question 13

How do the mesial cusps compare to the distal cusps in primary mandibular first molars?

Answer 13

mesial cusps are larger.

Question 14

How many primary teeth are there and how are they numbered?

Answer 14

20 teeth;

Alphabet (A-T)

Question 15

What are other names for primary teeth?

Answer 15

deciduous or milk teeth

Question 16

What are succadaneous teeth?

Answer 16

Permanent teeth that replace the primary teeth

Question 17

What are the non-succadaneous teeth?

Answer 17

All molars (12 molars total)

Question 18

Where are primate spaces found in the mouth?

What are primate spaces?

Answer 18

Primate spaces are spaces between the maxillary lateral incisors and canines as well as between the mandibular canines and first molars. Primate spaces within the mouth are to keep room for the permanent teeth.

Question 19

How do the roots and crowns of primary teeth compare to permanent teeth?

Answer 19

proportionally shorter and wider (mesiodistally) crowns

Question 20

Do primary teeth have mamelons?

Answer 20

no

Question 21

how do the pulp chamber and enamel shell compare between primary teeth and permanent teeth?

Answer 21

primary teeth have a larger pulp chamber and thinner enamel shells

Question 22

How do the roots and root trunk compare between primary teeth and permanent teeth?

Answer 22

primary teeth have very thin and widespread roots;

root trunk is very short or absent

Question 23

what is the crown shape of a primary maxillary 1st molar?

Answer 23

trapezoidal

Question 24

How do the mesial cusps copmpare to the distal cusps in primary 1st maxillary molars?

Answer 24

Mesial cusps are very prominent and distal cusps are small. (DL cusp may not be present)

Question 25

Which primary teeth have a MB cervical deflecting ridge?

Answer 25

Mandibular 1st and Maxillary 1st molars

Question 26

What are the biggest and smallest cusps in a primary maxillary molar

Answer 26

MB is the largest; and DB is the smallest (DL may not be present.)

Question 27

Which primary teeth may have an oblique ridge?

Answer 27

Maxillary 1st molar. (The ridge may not always be present.)

Question 28

What teeth are similar to the primary maxillary 2nd molar?

Answer 28

Permanent maxillary 1st molars.

Question 29

What is the shape and number of cusps in a primary second mandibular molar?

Answer 29

triangular shape;

5 cusps

Question 30

Which crowns are smoother and rounder: Primary 2nd molars or permanent 1st molars.

Answer 30

Primary 2nd molars

Question 31

How many cusps do primary maxillary 2nd molars have?

Answer 31

4-5 cusps