Primary dentition part 2 Flashcards
What does the primary maxillary first molar resemble
a premolar
how many roots does the primary maxillary first molar have
3, 2 buccal and 1 lingual
how many cusps does the maxillary first molar have
3 or 4
what shape is the occlusal surface of the maxillary first molar
triangular
what is the longest cusp of the maxillary first molar
ML
what is the largest root of the maxillary first molar
lingual
what is the outstanding characteristic of the maxillary 1st molar
it has a convexity on the MB aspect
describe the occlusal anatomy present on the maxillary first molar
-central fossa
-mesial and distal triangular fossa
-central, buccal, and distal developmental grooves
-mesial and central pit
- oblique ridge
what does the maxillary 2nd molar resemble
permenent maxillary first molar
what are the cusps of the maxillary second molar
ML,MB,DB,DL, and cusp of carabelli
what is the shape of the maxillary 2nd molar
rhomboidal
describe the occlusal of the maxillary 2nd molar
oblique ridge
-same fossae and grooves are permament 1st molar
how many roots does the maxillary 2nd molar have
MB,DB, and L
compare the primary maxillary 2nd molar to the permanent maxillary 2nd molar
-trifurcation very close to CEJ in primary
-cervix much narrower MD
how many cusps are on the primary mandibular 1st molar
4-MB,ML,DB,DL
describe the roots of the primary mandibular 1st molar
-2 roots mesial and distal
-short root trunk
-roots are slender and more splayed
what is the interesting fact about the primary mandibular 1st molar
does not resemble any other tooth in primary or secondary dentition
describe the buccal view of the primary mandibular 1st molar
-crown height on mesial is twice that of distal because CEJ dips apically
-mesial contour is straight
-distal is convex
where is the ML cusp on the lingual view of the primary mandibular 1st molar
centered in the tooth, in line with the mesial root
what is the largest cusp on the primary mandibular first molar
ML cusp
describe the occlusal features of the primary mandibular first molar
-mesial and distal triangular ridges joined by central developmental groove
-triangular ridges of MB and ML cusps form a transverse ridge
-lingual and buccal developmental grooves
-mesial and central pit
what tooth does the primary mandibular 2nd molar resemble
permanent mandibular 1st molar
how many cusps are on the primary mandibular 2nd molar
5 cusps: 3 buccal and 2 lingual
how many roots does the primary mandibular 2nd molar have
2 mesial and distal
what are the differences between the primary mandibular 2nd molar and the permanent mandibular 1st molar
-bifurcation of root close to CEJ
- roots flared
- 3 buccal cusps more equal in size
-cervical constriction
what is the primate space
space that exists mesial to the primary maxillary canine and distal to the primary mandibular canine in some deciduous dentitions
what is the leeway space
the combined mesiodistal widths of permanent premolars and the permanent canine less than the combined mesiodistal widths of the primary molars and primary canine