300 facts of dental anatomy Flashcards
permanent or primary teeth are less mineralized and due to that are more worn
primary teeth and are more worn
what is the difference in space from primary to permanent dentation in mm
2-4 mm space
if mamelons remain beyond age ___ means you have ____
10 , open bite
calcification of primary roots are ompleted by age ____ ?
3-4 years old
List the rule of eruption for primary teeth
central - lateral - 1st MOLAR -CANINE - SECOND MOLAR
Primary teeth erupt front to back except ?
Lower before upper except ?
front to back exctept canine erupt after 1st molars
lower ( man) before upper ( max ) except max lateral incisors
erupt before mand. lateral incisors
Rule of 4 , eruption period for primary teeth
at 7 months all 4 central incisors are erupted - add 4 months to it - at 11 months all 8 teeth central and lateral erupted - at 15 central lateral and 1ST MOLARS - 19 months we have CI , LI , 1st M,
23 - all complete eruption
Adults rule of 3 eruption sequence
1st molar - CI, LI @ age 6 -9
mand: C -> 1st premolar ->2nd premolar @ age 9-12
( max 1st premolar - 2nd premolar - canine )
2nd molar - @ age 12
3rd molar @ age 18
primate space develop in the maxillary primary dentation between ____ and _____ teeth
in the mandibular primary dentation between ____ and ____
max : lateral incisor and canine
Mand: canine and first molar
The primary spacing for ANTERIOR teeth most frequent caused by the ?
growth of dental arch
The direction of primary enamel rods in the cervical 3rd is in which direction ?
Permanent enamel rids direction in the cervical 3rd ?
occlusal direction for primary teeth
perpendicular to occlusal direction for permanent teeth
primary vs permanent molar root relationship
primary molars have divergent roots compared to permanent
Primary has bigger/smaller ? root trunk compared to permanent teeth ?
Primary’s root trunk is small maybe be absent
T/F the primary AND permanent mandibular central incisors have the most bilateral symmetry
True -
what teeth has the smallest faciolingula crown dimensions
Mandibular central incisors
In delayed resorption of primary incisors , the permanent incisors usually erupt ______
lingually aka Shark teeth
Where in the primary incisors can we find a prominent cervicle ridge ?
Cervicle ridge is found in the Facial and lingual surfaces
From a facial view the crown of a primary canine has _____slope longer than ______
mesial incisor in longer than the distal incisor
the cusp tip of the primary canine is generally off set to ____ ( Mesial or Distal ?)
Distal therefore the mesial slope is longer than the distal
Maxillary 1st primary molar has a crown that somewhat resembles which tooth ?
permanent PRE_MOLAR
The Max 1st primary molar has roots that resembles a typical permanent ____ ?
permanent max MOLAR !!!
which maxillary primary teeth has the largest ( or most prominent ) cervical ridge ?
Maxillary first molar
The only primary tooth with an OBLIQUE ridge
MAXILLARY 2nd primary molar
Which primary teeth is the only primary posterior tooth to have an oblique and Transverse ridges & DL groove
primary 2n molar
Which primary teeth exhibits cusp of carabelli
primary 2nd molar
what tooth is the last to erupt in primary dentation
MAX 2nd molar
remember - front to back except canine
lower then upper except lateral incisor
which primary max molars exhibits more cusps
1st molar or 2nd molar
primary second molar exhibits more cusps than the 1st molar
remember primary second molars are the only teeth with transverse and oblique ridge
Which primary tooth has the most distinctly prominent facial cervical ridge ?
PRIMARY MANDIBULAR 1ST MOLAR
facial view of which primary tooth has the -CEJ most apically positioned on the Mesial 1/3
mandibular 1st molar
