Primary Teeth Flashcards
What is the crown shape of all primary incisor?
Shovel-shape
Are the primary central incisors larger mesiodistally or incisocervically?
Mesiodistally
How are the developmental grooves on primary incisors?
Not-evident
How does the distal cusp ridge compare to the mesial cusp ridge in primary canines
Distal cusp ridges is shorter than the mesial
Are primary canines crowns longer mesiodistally or incisocervically?
crowns are as wide mesiodistally as they are incisocervically (i.e. about equal)
What primary teeth are equivalent (or similar in crown shape and cusp number) to permanent teeth?
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).
How many cusps do primary 2nd mandibular molars have?
5 cusps
What is the shape of all primary second molars?
Triangular shape
What primary teeth are unique and different compared to all permanent teeth?
first molars (both mandible and maxilla) #B, I, L, S
What are the unique features of the mandibular first molar
Rectangular shape; very rounded line angles
Transverse Ridge
What is unique about the cervical ridge in mandibular and maxillary first molars?
Very prominant MB cervical deflecting ridge. (i.e. the enamal extends onto the root
What is the smallest cusp in the primary mandibular first molar?
DL cusp is the smallest if it is present. If DL cusp is not present then the DB cups is the smallest.
How do the mesial cusps compare to the distal cusps in primary mandibular first molars?
mesial cusps are larger.
How many primary teeth are there and how are they numbered?
20 teeth;
Alphabet (A-T)
What are other names for primary teeth?
deciduous or milk teeth
What are succadaneous teeth?
Permanent teeth that replace the primary teeth
What are the non-succadaneous teeth?
All molars (12 molars total)
Where are primate spaces found in the mouth?
What are primate spaces?
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.
How do the roots and crowns of primary teeth compare to permanent teeth?
proportionally shorter and wider (mesiodistally) crowns
Do primary teeth have mamelons?
no
how do the pulp chamber and enamel shell compare between primary teeth and permanent teeth?
primary teeth have a larger pulp chamber and thinner enamel shells
How do the roots and root trunk compare between primary teeth and permanent teeth?
primary teeth have very thin and widespread roots;
root trunk is very short or absent
what is the crown shape of a primary maxillary 1st molar?
trapezoidal
How do the mesial cusps copmpare to the distal cusps in primary 1st maxillary molars?
Mesial cusps are very prominent and distal cusps are small. (DL cusp may not be present)
Which primary teeth have a MB cervical deflecting ridge?
Mandibular 1st and Maxillary 1st molars
What are the biggest and smallest cusps in a primary maxillary molar
MB is the largest; and DB is the smallest (DL may not be present.)
Which primary teeth may have an oblique ridge?
Maxillary 1st molar. (The ridge may not always be present.)
What teeth are similar to the primary maxillary 2nd molar?
Permanent maxillary 1st molars.
What is the shape and number of cusps in a primary second mandibular molar?
triangular shape;
5 cusps
Which crowns are smoother and rounder: Primary 2nd molars or permanent 1st molars.
Primary 2nd molars
How many cusps do primary maxillary 2nd molars have?
4-5 cusps
