Oral Anatomy - Tooth Characteristics [Incisors]

Maxillary Central Incisor

Most prominent tooth

Maxillary Central Incisor

Greatest mesial CEJ contour of all teeth

Maxillary Central Incisor

Second longest crown (next to mandibular canine)

Maxillary Central Incisor

Widest (M-D) of all anterior teeth

Maxillary Central Incisor

Occlusal shape is triangular; proximal shape is triangular

Maxillary Central Incisor

Has three mamelons and four developmental grooves

Maxillary Central Incisor

MMR > DMR

Maxillary Central Incisor

M-I corner sharper than D-I

Maxillary Central Incisor

Narrowest incisal embrasures of all maxillary teeth

Maxillary Central Incisor

M-D dimension > F-L (from occlusal)

Maxillary Central Incisor

Cingulum: slightly distal

Maxillary Central Incisor

Least likely to have a divided root canal

Maxillary Central Incisor

Roundest root form; can be rotated during extraction

Maxillary Central Incisor

Blunted apex

Maxillary Central Incisor

Has greatest axial inclination toward the facial

Maxillary Central Incisor

Occludes with Md central and lateral incisors

Maxillary Lateral Incisor

Third most common congenitally missing tooth (next to third molars and md 2nd PM).

Maxillary Lateral Incisor

Third most variable tooth form (next to third molars) - Peg lateral (microdont)

Maxillary Lateral Incisor

Dens-in-dente

Maxillary Lateral Incisor

Most common tooth to have a palato-radicular groove (2-5% prevalence), which can make scaling difficult.

Maxillary Lateral Incisor

Occlusal shape is oval; proximal shape is triangular

Maxillary Lateral Incisor

MMR (straight) > DMR

Maxillary Lateral Incisor

M-I corner sharper than D-I

Maxillary Lateral Incisor

Most concave lingual surface among all incisors

Maxillary Lateral Incisor

M-D dimension > F-L (from occlusal)

Maxillary Lateral Incisor

Most developed lingual anatomy of all anterior teeth

Maxillary Lateral Incisor

Cingulum: central. Often prominent (talon cusp), creating a lingual pit

Maxillary Lateral Incisor

Root just as long as maxillary central

Maxillary Lateral Incisor

Root: Typically curves to the distal.

Maxillary Lateral Incisor

Occludes with mandibular lateral incisor and canine

Mandibular Central Incisor

Smallest tooth

Mandibular Central Incisor

Narrowest (M-D) tooth

Mandibular Central Incisor

Most symmetrical tooth

Mandibular Central Incisor

Greatest mesial CEJ contour of mandibular teeth

Mandibular Central Incisor

First succedaneous tooth to erupt

Mandibular Central Incisor

MMR = DMR

Mandibular Central Incisor

D-I corner is equally as sharp as M-I

Mandibular Central Incisor

Incisal edge lingual to long axis (from proximal)

Mandibular Central Incisor

F-L dimension > M-D (from occlusal)

Mandibular Central Incisor

Incisal edge perpendicular to B-L bisector (from occlusal)

Mandibular Central Incisor

Cingulum: central and indistinct

Mandibular Central Incisor

Root has mesial and distal (deeper) concavities (hourglass shaped)

Mandibular Central Incisor

Occludes with maxillary central incisor

Mandibular Central Incisor

Only anterior tooth to occlude with one tooth.