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53 Cards in this Set

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Permanent Incisors

Central and Later


Max: #7-10


Mand: #23-26

Permanent Incisors Function

cut/incisal edge, speech and esthetics

Permanent Incisors


Arch resemblance

incisors in the same arch are similar but not to opposing arch

Permanent Incisors

Annotation

7-10


23-26

Incisor Class Traits


Incisal edge

incisal 2/3 of crown is compressed labiolingually

Incisor Class Traits


Mamelons

-joining the developmental lobes, usually in newly erupted teeth or in an open bite


-attrition wears these off

Incisor Class Traits


Position/Angulation of marginal ridges

parallel to the long axis of the tooth

Incisor Class Traits


Lingual fossa/cingulum

concave and convex

Maxillary Incisor Arch Traits

-Width is greater than mand. width


-Marginal ridges are more prominent


-Cingulum/lingual pit are more prominent


-Root- equal dimensions


-Labial surface is more rounded (view incisally)


-Crown is wider mesial-distally


-Wear facets- lingual incisal

Maxillary Central Incisors

Eruption age- 7-8


Root Completed- 10

Maxillary Central: Labial View

-Widest- mesial-distal of any incisor


-MI angle- at a right angle


-Di angle- slightly rounded


-Height of contour/crest of curvature-highest point of the tooth

Labial View Cont.

-Mesial outline- contact close to incisal edge


-Distal outline- more convex, contact junction of incisal and middle 1/3s


-Facial surface- may see developmental grooves


-Imbrication lines- faint elevated lines- cervical 1.3, parallel to CEJ


-Root- conical (cone shaped)

Maxillary Central: Lingual View

-Crown profile- converges toward lingual


-Cingulum/fossa- concave/convex


-Incisal ridge- newly erupted


-Incisal edge- slopes with age


-Marginal ridges- very pronounced


-CEJ- very pronounced

Maxillary Central: Mesial View

-Crests of Curvature: Cervical 1/3


-CEJ: very deep, most curved of any maxially


-Root: in line

Maxillary Central: Distal View

-Similar to mesial except CEJ


-CEJ- more shallow dip


-Distal Contact- slightly more cervical


-Root: toward distal

Maxillary Central: Incisal View

-Can see more facial than lingual


-ML>DL outline


-Cingulum- distal to midline


-MMR and DMR- MMR linger because cingulum is more distal

Maxillary Lateral: Labial View

-Smaller, except root may be longer


-Rounded, especially MI and DI


-Mesial contact- junction of incisal and middle 1/3


-Distal contact- center of middle 1/3


-Root- distal inclination

Maxillary Lateral: Lingual View

-Outline same as labial


-MMR/DMR more prominent


-Deeper fossa/fit


-CEJ- curved

Maxillary Lateral: Mesial View

-Same as central, just smaller


-CEJ- less curvature than central


-Crest of Curvature- slightly more incisally placed compared to central

Maxillary Lateral: Distal View

-Similar to mesial


-CEJ- less curvature


-DMR gives thicker appearance

Maxillary Lateral: Incisal View

Same expect: cingulum prominent (smaller, centered); rounded facial surface

Anomalies/Variations

-Labial Outline: centrals, tapering, square or oval; laterals, pegged


-Labial lobes- central, deep grooves


-Mamelons- vary in number


-Cingulum- central talon cusp, lateral-lingual or exaggerated fossa


-Root size- short or long

Mandibular Incisor Arch Traits

-Narrowest teeth


-Lateral>Central


-MR and cingula are not prominent


-Roots- wider labiolingually

Mandibular Central Incisor

Eruption: 6-7 years old


Root complete: 9 years old



Mandibular Central Incisor: Labial View

-MI and DI line angles/incisal edge


-Contacts – both incisl 1/3 at same height


-Mesial/distal outlines- converge equally to the cervical


-CEJ – semi-circle


-Root – narrow, distal inclination

Mandibular Central Incisor: Lingual View

-Anatomy is faint


-CEJ-more curvature due to the convergence of the crown lingually

Mandibular Central Incisor: Mesial View

-Crests of Curvature- lingual and facial in cervical 1/3


Incisal edge-Slightly lingual to long axis


-Root-Flat and broad

Mandibular Central Incisor: Distal View

Same as mesial except:


CEJ less curvature


Developmental groove-Deeper on this aspect than on the mesial root surface

Mandibular Central Incisor: Incisal View

-Bilateral symmetry


-Dimensions-Greater labiolingually


-Cingulum-Slightly to distal


-Root

Mandibular Lateral Incisor

-Eruption: 7-8 years old


-Root completed: 10 years old

Mandibular Lateral: Labial View

-Not symmetircal


-Incisal edge sloped toward distal


-Outline and line angles-Mesial outline greater, DI more rounded


-Contacts-Both in incisal 1/3, with distal more cervical


-Wider M-D than central

Mandibular Lateral: Lingual View

-Cingulum-Offset, more distal than central


-CEJ-Curvature is also slightly offset toward distal

Mandibular Lateral: Mesial View

CEJ: More curve than distal

Mandibular Lateral: Distal View

CEJ: Marginal ridge is thicker

Mandibular Lateral: Incisal View

-Not at 90 degrees


-Follows curvature of arch


-Twisted towards canine

Variations

-Labial surface inclination


-Mamelons


-Root curvature

Canines

#6, 11, 22, 27


-Third from midline/transitional


-Canines/cuspids

Canine Fuctions

-Pierce, hold and tear food


-Stongest tooth in the arch


1. cornerstone of occulusion


2. usually the darkest tooth


3. protects posterior teeth

Canine Class Traits

-Cusp-large


-Root- longest


-Functional lingual surface- only cusped tooth that have this function

Maxillary Canine

-Eruption: 11-12 years old


-Root completed: 14-15 years old

Maxillary Canine Arch Traits

-Incisal margin- occupies a 1/3 to 1/2 of crown height


-Lingual anatomy- more pronounced


-Labiolingual diameter- greater cervical

Maxillary Canine: Labial View

Two cusp ridge to form the cusp (distal greater than mesial)


-DCR > MCR – places cusp tip mesial of midline


Outlines – distal much stronger convexity, large bulge


Root – long and conical, distal inclination, concavities


Imbrication lines – possible


Crests of curvature:


-Mesial - junction of middle and incisal 1/3


-Distal – middle 1/3, large bulge

Maxillary Canine: Lingual View

-Two cusp ridges


-Prominent MMR/DMR


-Lingual ridge – extends from cusp to cingulum


-Canines are the only teeth that have a lingual ridge

Maxillary Canine: Mesial View

Crests of curvature

Labial outline- cervical 1/3


Lingual outline – cervical 2/3 convex, incisal 1/3 is flat


Cusp – in long axis or just facial


Root- greater labiolingual dimension


CEJ- greater curvature on mesial

Maxillary Canine: Distal View

Root- deeper concavity


CEJ – slightly less than mesial

Maxillary Canine: Incisal View

-Asymmetry- greater labiolingually


-Labial 1/2> Lingual 1/2


-Developmental depressions


-Variations


1. Cusp Sharpness


2. Degree of slope from cusp

Mandibular Canine

Eruption: 9-10 years old


Root Completed: 11-13 years old

Mandibular Canine Arch Traits

-Cusp- not as pronounced


-MMR/DMR- less convergence


-Incisal margin- confined to incisal 1/4


-Lingual anatomy – less prominent


-Contacts – more incisally placed

Mandibular Canine: Labial View

-Outlines- straight below contact


-Contacts- mesial incisal 1/3, distal junction of incisal and middle 1/3s


-Cusp ridges – DCR > MCR


-Root pointed


-CEJ – slight arc

Mandibular Canine: Lingual View

-Less anatomy


-Root- distal inclination


-CEJ- offset to distal, less curvature than labial

Mandibular Canine: Mesial View

-Cusp tip- just lingual to long axis


-Labial outline- convex arc


-Lingual outline- flat to concave


-Contact- middle to incisal 1/3s


-CEJ - less curved than incisors

Mandibular Canine: Distal View

-Contact- more cervically placed than mesial


-CEJ- less curvature


-Root- deeper groove than mesial

Mandibular Canine: Incisal View

-Labial surface:


1 – grooves lesser or absent


2 – rounder towards mesial


-Cingulum- offset to distal


-Variation – root bifurcation in apical 1/3