Flashcards in Dental Anatomy Deck (12):
point vs line angles
-ALL TEETH HAVE 4
-formed from junction of 3 surfaces
-Anterior teeth have 6
-posterior teeth have 8
-formed from junction of 2 surfaces
where inclinces meet
narrow channel, sometimes deep, formed at depth of developemental grroves
pinpoint depressions located at the junctions of developmental grooves
irregular depression or concavity
sharpley defined, shallow, linear depressions
*pits are located at the termination or junction
summary of number of lobes for all teeth?
all anterior teeth = 3 labial and 1 lingual (cingulum)
premolars = 3 buccal and 1 lingual
**exception is MD 2nd premolar with 3 buccal and 2 lingual
1st molars = 5 lobes
2nd molars = 4 lobes
3rd molars = at least 4 lobes
how many embrasures?
lingual **larger than facial!
facial (labial or buccal)
occlusal or incisal
gingival or cervical
buccal cusps of MX posterior teeth oppose? lingual cusps oppose?
buccal oppose buccal grooves and embrasures
lingual oppose marginal ridges and central and distal fossa
remember what about lingual cusps of MX 1PM and 2PM?
they lean mesially!
calcification for all primary teeth starts?
4-6 months in utero
OR during 2nd trimester
OR ~17-26 weeks