PRIMARY MAXILLARY 2 nd MOLAR Javier Barahmi Tan Quintero Marzan Buccal aspect 2 well-defined cusps= MB, DB Crown narrow at cervix in comparison w/ its MD measurement at contact areas Crown much bigger than first primary molar Roots appear slender, but are much longer and heavier than those of max 1 st molar Point of bifurcation bet. Buccal roots is close to cervical line. 2 buccal cusps more nearly equal in size Deciduous max 2 nd molar Permanent max 1 st molar Lingual aspect 3 cusps: MLC, DLC, and 3 rd supplemental cusp Tubercle of carabelli/ 5 th cusp- poorly developed; acts as a buttress or supplement for the bulk of MLC Developmental grooves separates MLC from DLC and connects with DG which outlines the 5 th cusp Lingual Root is large and thick, almost same length as MBR Proximal aspect MESIAL Crown resembles that of the permanent molars Crown appears short because of its with buccolingually MLC cusp larger than MBC MBC short and sharp Very little curvature to the cervical line MBR is broad and flat MBR presents itself being quite wide from the mesial aspect Still proximal!!! DISTAL Outline of the crown lingually creates a smooth rounded line, describing the buccal surface is almost straight from the crest of curvature to the tip of the buccal cusp. DBC and DLC are about the same length Cervical line approximately straight Only a part of the outline of MBR is seen, since DBR is superimposed over it DBR is shorter and narrower than the other roots Point of bifurcation bet. DBR and LR is more apical Point of bifurcation bet. The 2 roots is nearly centered above the crown. Occlusal aspect Resembles permanent first molar Rhomboidal and has 4 well- developed cusp and 1 supplemental cusp: MB, DB, ML, DL, and fifth cusp Developmental grooves bet. Cusps less marked than that found on the first permanent molar. DG, pits, obliuqe ridge are almost identical Central fossa w/ central pit, mesial triangular fossa Know at heart