300 Dental Anatomy FACTS part i Flashcards
are permanent or primary teeth less mineralized
Primary are less mineralized than permanent therefore they are worn more
the difference in space from primary to permanent dentition in mm
2-4mm in the arch length
Mamelons that remain beyond the age of ____ are generally indicate an open bite
10 years old
at what age is the calcification of primary roots completed by ?
age of 3-4
Rule of 4 of eruption for primary teeth
Rule of 4 - at age of 7 we have 4 teeth CI - add 4 months to it - age 11 months - 8 teeth 4 CI +LI -> age of 15 we have CI, LI , 1st Molar
eruption sequence -
Eruption sequence for primary teeth
Central incisor - lateral incisor -1st molar -canine -2nd molar
anterior to posterior except canine
lower before upper except lateral incisors
Eruption sequence in permanent teeth
1st molar -central Incisors - lateral incisors - = 6-9 years old
mand : canine- 1 premolar - 2nd premolar - 9-12
max - 1st premolar - 2nd premolar - canine 9-12
2nd molar - at age of 12
3rd molar wisdom - age of 18
first permanent tooth to erupt ? at what age ?
1st molar at the age of 6
primate space develop in the maxillary primary dentition between ________ and _________
lateral incisor and canine
primate space develop in the mandibular primary dentition between _________ and ______
canine and 1st molar
The primary spacing for anterior teeth is most frequent caused by ______
growth of dental arch
which direction do enamel rods point in the cervical 3rd of the primary dentition vs permanent ?
the direction of primary enamel rods in the cervical 3rd is in occlusal direction vs permanent is perpendicular to occlusal
T/F primary molars roots are more divergent than permanent roots
true
T/F primary molars root trunk is longer than the permanent
False - primary molars have short or sometimes lack root trunk
what primary teeth has the smallest crown faciolingually
primary mandibular incisor
