Development and Eruption of Teeth Flashcards
Maxillary permanent eruption age
781-0062, second 0 is underlined meaning three year spread. Every other number is a two year spread
7 is the central incisor and 2 is the 2nd molar
Mandibular permanent eruption age
679-0161, the 0 and last 1 are underlined meaning a three year spread. Every other number is a two year spread.
6 is the central incisor and 1 is the 2nd molar
When does calcification begin in utero?
13-16 weeks, by 18-20 weeks all have begun to calcify
When is calcification of permanents complete?
8-12 years old
Primary crown formation continues after birth for how many months for each tooth?
centrals-3 months lateral-4 months 1st molar-7 months canine-8 1/2 months 2nd molar-10 1/2 months
does the crown or the root form first?
the crown, root growth aids in tooth eruption
Prenatally, is the mandibular or maxillary jaw larger?
mandibular
Primary Max Central Incisors eruption (in months) and shed date (in years)
8-12 months erupt
6-7 years shed
Primary Max Lateral Incisors eruption (in months) and shed date (in years)
9-13 months
7-8 years
Primary Max Canine
eruption (in months) and shed date (in years)
16-22 months
10-12 years
Primary Max 1st molar
eruption (in months) and shed date (in years)
13-19 months
9-11 years
Primary Max 2nd molar
eruption (in months) and shed date (in years)
25-33 months
10-12 years
Primary Man. Central Incisor
eruption (in months) and shed date (in years)
6-10 months
6-7 years
Primary Man. Lateral Incisor
eruption (in months) and shed date (in years)
10-16 months
7-8 years
Primary Man. Canine
eruption (in months) and shed date (in years)
17-23 months
9-12 years
Primary Man. 1st Molar
eruption (in months) and shed date (in years)
14-18 months
9-11 years
Primary Man. 2nd Molar
eruption (in months) and shed date (in years)
23-31 months
10-12 years
General Numbers for Primary Mandibular (in months)
7 CI, 11,LI, 15 1stM, 19C, 24 2ndM
What tooth begins the mixed dentition?
Mandibular 1st molar
Why is the mandibular 1st perm. molar not a succedaneous tooth?
Because it does not replace any primary teeth
Where do the follicles of developing incisors and canines develop?
Lingual to the primary roots
Where do the follicles of premolars develop?
In the bifurcation of primary molars
What teeth are succedaneous teeth?
Incisors, canines, and premolars
What are the 4 types of CEJs?
- Enamel overlaps cementum
- End to end
- Gap exposing dentin
- Cementum overlapping enamel
T/F Periodontal fibers cannot embed into enamel?
True!! only can embed in cementum
