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what shape is max 1st molar?
trapezoidal, square or rhomboid shape
have a development buccal groove dividing into 2 symmetrical portions
supplemental/accessory cusp, varies in size
cusp of carabelli groove
not preseint in all dentition
appear as a groove or cusp or may be absent
not major cusp
DL groove extends onto, L surface & separates MI cupz from the DL cusp
ML groove separates teh cusp of carabelli on the occlusal surface
Each cusp has a triangular ridge
transverse ridge formed by
buccal triangular ridge of mesiolingual cusp and lingual triangular ridge of mesiobuccal cusp
carabelli-min or non functional cusp
on the max 1st molar, oblique ridge is made up of
D ridge of ML cusp and the triangular ridge of DF cup
by size of root
lingual/palatal-curves in F largest, longests, strongest. has longitiudinal grooves,
MF curves to D and wider longer of the F roots
horns of max molar
3-4, lingual palatal, largest, oval to round, mf 1-3 canals rough. Df small round
no fifth cusp
4 cus tp centered over lingual area
no fith cusp rinse
dl cusp centered overl light areas
ml cups i slonger and larger
dl cusp is short
1 16 max molars
wisdom, may be errupted by 17 most lkely to be missing, impactation mneasn beflore surface, gernally DL cusp abesnt
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