Permanent Maxillary Central Incisors #8 & #9 Curvature of mesial CEJ wider that CEJ of distal Cingulum slightly offset to distal side Incisal angle – mesial angle 90 degrees Permanent Maxillary Lateral Incisors #7 & #10 Mesial CEJ is more curved than distal CEJ Apex of root is sharper than Max. Central Linguogingival groove may be present Mesial incisal angle sharper than distoincisal angle Variation --- shovel shaped Permanent Mandibular Central Incisors #24 & #25 Fan shaped crown Mesioincisal angle slightly shaper than distoincisal CEJ curvature is higher on the mesial than the distal Permanent mandibular Lateral Incisors #23 & #26 Crown appears tilted distally Mesioincisal angle is sharper than distoincisal angle In incisal view, the cingulum appears displaced toward the distal Permanent Maxillary Canine #6 & #11 Developmental depression on the distal surface of root CEJ curves higher on the mesial than the distal Mesial cusp slope is shorter than the distal cusp slope Permanent Mandibular Canine # 22 & # 27 Distal outline is shorter and rounder than the mesial outline from the labial view. Mesial cusp slope is shorter than distal cusp slope. CEJ curve is more toward incisal on the mesial surface Permanent Maxillary 1st Premolar #5 &#12 Larger than Max. 2nd premolar 2 roots ( buccal & lingual) Mesial root concavity extending from contact point to bifurcation of root Buccal cusp about 1mm longer than lingual cusp. Only tooth that has a buccal cusp with a mesial cusp slope longer than the distal. CEJ curvature is more on mesial than distal. Occlusal view is hexagon shaped Has prominent mesial marginal groove. Central groove is “V” shaped. Permanent Maxillary 2nd Premolar #4 & #13 Smaller than Max. 1st premolar Only a single root Buccal cusp about the same height as lingual cusp. Lingual cusp slightly displaced to the mesial. No mesial developmental depression No mesial marginal groove on occlusal view. Central groove is shorter than central grove of the Max. 1st premolar. Permanent Mandibular 1st Premolar #21 & #28 Lingual cusp very small Looks like a cingulum. Mesobuccal cusp slope shorter than distobuccal cusp slope. Crown tapers toward lingual. **Snake Eyes** Occlusal view looks diamond shaped with a notch in the mesial outline at the mesiolingual groove. Permanent Mandibular 2nd Premolar #20 & #29 2 types 2 cusp & 3 cusp 3 cusp has a square shape from occusal view Mesial marginal ridge straighter than distal marginal ridge from occlusal view. “V” shaped central groove joins with lingual groove to form a “Y” shape. 2 cusp is either a “U” shaped central groove or a straight central groove that looks like an “H” from the occusal view. Permanent Maxillary 1st Molar #3 & #14 Largest tooth in dentition. 3 roots (2 buccal & 1 lingual (longest)) 4 cusp with variable 5th cusp off the mesiolingual cusp (Cusp of Carabelli) Cusp size from largest to smallest--- mesiolingual, mesiobuccal, distobuccal, distolingual Occlusal view has an overall rhomboidal outline. Prominent oblique ridge. Permanent Maxillary 2nd Molar #2 & #15 Distolingual cusp very small Occlusal view may be rhomboidal or heart shaped. Permanent Maxillary 3rd Molar #1 & #16 May be heart shaped. If so it has 3 cusp (No distolingual cusp) May be rhomboid shaped. If so it has 4 cusp (very small distolingual cusp) Distobuccal cusp much shorter than mesiobuccal cusp Roots are fused with distobuccal root being the smallest Roots are curved distally. Permanent Mandibular 1st Molar #19 & #30 5 cusp (3 buccal and 2 lingual) 2 roots (mesial and distal) Mesiobuccal cusp in the largest Mesiobuccal groove Buccal cervical ridge more prominent in mesial Mesial marginal groove notches mesial marginal ridge Occusal view has a pentagon shape with the 5th side created by the distal cusp. Size of cusp (from largest to smallest) mesiobuccal, mesiolingual, distolingual, distobuccal, distal Permanent Mandibular 2nd Molar #18 & #31 4 cusp all cusp equal size. Outline of occusal view is rectangular Cross-shaped groove pattern 2 transverse ridges Molar is wider buccolingually on the mesial surfaces than the distal. Permanent Mandibular 3rd Molar #17 &32 Crown tapers distally when viewed from mesial aspect. Occusal outline is more oval 2 mesial cusp larger than 2 distal cusp.