Anatomy Ch 16

Front 1

traits of all incisors

Back 1

mamelon, developmental depression, distal slopes more rounded, roots wider faciolingually, roots longer than crowns, roots curve slightly distally, CEJ curves more on mesial, triangular shape from proximal

Front 2

Maxillary Central Incisor numbers

Back 2

#8,9

Front 3

Maxillary Central Incisor eruption ages

Back 3

average 7-8

Front 4

Maxillary Central Incisor size

Back 4

longest crown of all the teeth; widest of the incisors

Front 5

Max. Cent. Incisor (labial view)

Back 5

mamelons, imbrication lines, labial depressions. Almost symmetrical. Contact area Mesial MI line; Distal: incisal 3rd

Front 6

Max. Cent. Incisor (lingual view)

Back 6

cingulum off-center distal; chance of lingual pit

Front 7

Max. Cent. Incisor (proximal view)

Back 7

CEJ curvature more prounounced on mesial than any other tooth

Front 8

Max. Cent. Incisor (incisal view)

Back 8

"distolingual twist"

Front 9

Max. Cent. Incisor (root)

Back 9

straight, conical; up to 1 1/2x longer than crown; apex blunt; 3 pulp horns; large pulp chamber; sensitive; accidents can damage

Front 10

Max. Cent. Incisor (anomolies)

Back 10

supernuerary (mesiodens); diastema (middle of 8&9); avulsion (lost tooth); attrition (bruxing or loss of tooth structure)

Front 11

Max. Lateral Incisor numbers

Back 11

#7,10

Front 12

Max. Lateral Incisor eruption

Back 12

8-9

Front 13

Max. Lateral Incisor

Back 13

extreme variability in anatomy with peg laterals (congenital); 2nd most frequently missing (3rd molars are most)

Front 14

Max. Lateral Incisor

Back 14

often confused with small mand. canine

Front 15

Max. Lateral Incisor (facial view)

Back 15

imbrication lines and depressons NOT as pronounced; m & d sides more rounded than central, with distal more rounded than mesial. Contact area mesial: junction of incisial & middle 3rds. Distal: middle of middle 3rd

Front 16

Max. Lateral Incisor (lingual view)

Back 16

LINGUAL PIT; groove, may be "shovel-shaped"

Front 17

Max. Lateral Incisor (proximal view)

Back 17

CEJ curvature greater on Mesial

Front 18

Max. Lateral Incisor (incisal view)

Back 18

cingulum centered

Front 19

Max. Lateral Incisor (root)

Back 19

1 1/2x longer than crown (longer than centrals), conical, but narrower, development depresson on mesial surface, single root canal; NO pulp horns

Front 20

Max. Lateral Incisor (anomolies)

Back 20

microdontia (peg lateral); anodontia (congenitally missing), dilacerations, curved root

Front 21

Mandibular Incisors (general)

Back 21

smallest perm. teeth, laterals larger, developmental grooves on root. Root is hourglass shape. Lingual fairly smooth. Wider F-D. Wear (attrition) makes incisal edge straight. single root canal, 3 pulp horns.

Front 22

Mand. Incisor (anomolies)

Back 22

bifurcated or accessory root, attrition, calculus

Front 23

Mand. Central Incisor number

Back 23

#24,25

Front 24

Mand. Central Incisor eruption

Back 24

6-7

Front 25

Mand. Central Incisor general

Back 25

1st perm. tooth to erupt AFTER 1st molars; smallest; single antagonist; bilaterally symmetrical

Front 26

Mand. Central Incisor (facial)

Back 26

M&D nearly straight; root is thin, may curve distally; contact areas m&d at incisal 3rd.

Front 27

Mand. Central Incisor (lingual)

Back 27

no pits; surface is narrower than facial

Front 28

Mand. Central Incisor (proximal)

Back 28

incisal edge pints more lingual. very wide f-l

Front 29

Mand. Central Incisor (incisal)

Back 29

cingulum is in center

Front 30

Mand. Lateral Incisor number

Back 30

#23,26

Front 31

Mand. Lateral Incisor eruption

Back 31

7-8

Front 32

Mand. Lateral Incisor general

Back 32

larger in all dimensions including root length than mand. centrals; 2nd smallest perm. tooth; cingulum shift distally; surfaces of crown more rounded.

Front 33

Mand. Lateral Incisor (facial)

Back 33

smooth facial surface, labial developmental depressons more pronounced; distal more curved. root long and thin; may curve distal. Line angle: MI 90 degrees; DI more rounded. Contact area Mesial: MI line angle; Distal: toward middle (still in incisal 3rd)

Front 34

Mand. Lateral Incisor (lingual)

Back 34

all structures more prononuced than mand. centrals

Front 35

Mand. Lateral Incisor (proximal)

Back 35

same general shape as mand. centrals; incisal edge curves lingually. Root wider and has concavities, which are more pronounced on distal

Front 36

Mand. Lateral Incisor (incisal)

Back 36

cingulum shifted distal; DI line angle visibly more lingual than MI angle

Front 37

Max. Canines general

Back 37

longest roots; sharp pointed cusp; lingual vertical ridge divides lingual fossa; most stable; form corners of arch; alveolar bone forms canine eminence; more yellow; root concavities on both proximal surfaces

Front 38

Max. Canines eruption

Back 38

11-12

Front 39

Max. Canines number

Back 39

#6,11

Front 40

Max. Canines general

Back 40

Middle lobe forms cusp; largest cingulum of any anterior. If erupt incorrectly, can shift midline. Can be impacted sideways.

Front 41

Max. Canines (facial)

Back 41

contact areas: mesial: junction of incisial and middle 3rd, Distal: middle of middle 3rd. Crown and root not as wide. Shortest distance from MI line angle to cusp tip. pentagonal.

Front 42

Max. Canines (lingual)

Back 42

lingual convergance because crown and root are narrower. large cingulum offset to distal. Vertical line ridge separates fossa. May have lingual pit.

Front 43

Max. Canines (proximal)

Back 43

Wider from facial to lingual than other anteriors. Develop. depression deeper on distal.

Front 44

Max. Canines (root)

Back 44

conical; may curve distal. Large pulp chamber; single root canal; no pulp horns, chamber is rounded.

Front 45

Mand. Canines eruption

Back 45

9-10

Front 46

Mand. Canines general

Back 46

Different from maxillary by: crown is narrower, anatomical crown longer, root is shorter, lingual is smoother (less developed cingulum), cusp tip curved lingual.

Front 47

Mand. Canines (facial)

Back 47

distance from MI to cusp is SHORTER than DI to cusp, mesial is straight; distal slightly convex

Front 48

Mand. Canines (lingual)

Back 48

similar to maxillary, EXCEPT structures aren't as noticable.

Front 49

Mand. Canines (proximal)

Back 49

cusp tip more lingual, CEJ curves more on mesial, root is wide facial-lingual, developmental depression (root concavity) more pronounced on distal; MOST likely to have bifurcated root on apical 3rd

Front 50

Mand. Canines (incisal)

Back 50

cingulum offest to distal

Front 51

Mand. Canines (root)

Back 51

One pulp chamber and root canal (unless bifurcated). Sometimes 2 RC with only 1 root; root may have slight MESIAL inclination