Permanent Maxillary Central Incisors #8 & #9

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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

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.

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