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which cusp ridge is shorter than the other cups ridge in the facial aspect?
mesiobuccal cusp ridge is shorter than distobucco cusp ridge
mesial lingual groove, nonfunctional ligual cusp varies in size, lingual cusp towards distal, mesial marginal ridge and lingual cusp devided by mesiolingual groove
mesial crest of curvature deeper, mesiolingual developmental groove, mesial marginal ridge has extreme lingual slop, mesial develpmental groove is present between mesial marginal ridge and mesiolingual cusp. facial cusp centered over root, looks tipped toward lingual
facial cusp dominates, rounded diamond outline, mesiolingual longer, trasnverse ridge from facial to lingual cusp or not
1st mand premolard teh grooves are
well defined, the mesiolingual groove, central and mesial and distal grooves, Mesiofacial, mesiolingual, distofacial, distolingual, transverse, pit/fossae-mesial pit, distal pit
root has what type of grooves
longitudinal grooves, deep developmental groove on mesial aspect of the root
mand 2 premolars have 3 types of cusps
y-type, h-type, u-type, 2 developmental grooves, distal cusps ridge is facial cups i longer
lingual aspect 2nd premolars mand
h-type, u type have one lingual cusp, y type has two lingual cusp ml& dl...and lingual groove
u type, htype(2 cusps) 2 triangular ridges
groove central (m & D), marginal (M&D), pits fossae m & D
3 cusps, grooves, central m & d, margincal m& d, lingual, pits fossae, m d central, only on central groove
single root blunt, bulk, may devate to distal, longitudinal groove. one pulp horn per cusp or 3
one root conal
larger and longer root than mand 1st
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