Midterm 2 Flashcards
most molar have how many cusps and how many lobes?
3-5 cusps AND lobes (one lobe per major cusp)
- mand 1= 5; md 2= 4
- Mx 1=5-4; Max 2= 4-3
from bucullingually, which way do molars tapper?
from buccel to lingual
from mesialdistal, which way do molars taper?
mesial to distal (aka, distal is shorter)
what is a molars shortest dimension what dimension is larger/longer?
occulsalcervical, BOTH mesiodistal and buccal-lingual are larger
is the mesial or distal half of a molar longer occlusooservically?
mesial is always taller than distal (1st premolar mandibular is exception?)
all mesial contacts for premolars and molars are where?
at the JUNCTION of the middle/occlusal 3rd
all distal contacts for premolars and molars are where?
at the middle third
- more buccal for mesial
- more centered for distal
facial HOC is where for molar and premolars?
cervical
lingual HOC is where for molars and premolars?
middle
calcification occurs at what stage?
bell stage; 16 weeks aka 4 months
when does the bud stage start?
6 weeks
primate space is where in relation to max and mand canine?
mesial to max canine
distal to mad canine
how much root is formed when it the crown passes the crest of alveolar bone?
1/2
how much root is formed when the crown passes the tissue?
3/4
when does active eruption stop?
once the teeth are at occlusion; start of passive
