Gpc Dental Tissues Exam 1: Teeth

Front 1

Maxillary Central Incisor

Back 1

#8, #9

Calcification: 3-4 mos
Eruption 7-8
Root Completion: 10

Widest crown MD, greatest CEJ curve, and height of contour; distal offset cingulum, shallow lingual fossa, marginal ridges

Sharper MI angle, rounder DI angle, more pronounced mesial CEJ curvature

Mesial Contact: Incisal 3rd
Distal contact: Junction of incisal and middle thirds

single rooted, overall conical shape, no proximal root concavities

Front 2

Maxillary Lateral Incisor

Back 2

#7, #10

Calcification: 1 year
Eruption 8-9
Root Completion: 11

Greatest crown variation, like a smaller maxillary central, prominent lingual surface; centered cingulum, pronounced marginal ridges

Sharper MI angle, rounder DI angle, more pronounced mesial CEJ curvature

Mesial Contact: Incisal 3rd
Distal contact: middle 3rd or junction with incisal 3rd

single rooted, overall conical shape, no proximal root concavities

Front 3

Mandibular Central Incisor

Back 3

#24, #25

Calcification: 3-4 mos
Eruption 6-7
Root Completion: 9

Smallest and simplest tooth, bilaterally symmetrical; small centered cingulum, subtle lingual fossa, and equal subtle marginal ridges

Sharper MI angle, rounder DI angle, more pronounced mesial CEJ curvature

Mesial Contact: Incisal 3rd
Distal contact: Incisal 3rd

single rooted, bow shaped on cross section root is longer than the crown proximal root concavities give double-rooted appearance

Front 4

Mandibular Lateral Incisor

Back 4

#23, #26

Calcification: 3-4 mos
Eruption 7-8
Root Completion: 10

Like a large mandibular central, no bilaterally symmetrical, appears twisted distally; small, distally paced cigulum; lingual fossa and moderate mesial marginal ridge longer than distal

Sharper MI angle, rounder DI angle, more pronounced mesial CEJ curvature

Mesial Contact: Incisal 3rd
Distal contact: Incisal 3rd

single rooted, bow shaped on cross section root is longer than the crown proximal root concavities give double-rooted appearance

Front 5

Maxillary Canine

Back 5

#6, #11

Calcification: 4-5 mos
Eruption 11-12
Root Completion: 13-15

Prominent lingual anatomy, sharp cusp tip

Single cusp, with tip and slopes, labial ridge, marginal ridges and lingual ridge, cingulum, and lingual fossae; longest tooth in each arch or dentition

Shorter Mesial cusp slope, more cervical contact on distal, more pronounced mesial CEJ curvature

Mesial Contact: Junction of incisal third and middle thirds
Distal contact: middle 3rd

single rooted, bow shaped on cross section root is longer than the crown proximal root concavities give double-rooted appearance

Front 6

Mandibular Canine

Back 6

#22, #27

Calcification: 4-5 mos
Eruption 9-10
Root Completion: 12-14

Smoother lingual anatomy, less sharp cusp tip

Single cusp, with tip and slopes, labial ridge, marginal ridges and lingual ridge, cingulum, and lingual fossae; longest tooth in each arch or dentition

Shorter Mesial cusp slope, more cervical contact on distal, more pronounced mesial CEJ curvature

Mesial Contact: Junction of incisal third and middle thirds
Distal contact: middle 3rd

single rooted, bow shaped on cross section root is longer than the crown proximal root concavities give double-rooted appearance

Front 7

Maxillary 1st Premolar

Back 7

#5, #12

Calcification: Birth
Eruption: 6-7
Root Completion: 9-10

Larger than second, with buccal cusp longer of two, long central groove

Occlusal table with marginal ridges and cusps, with tips, ridges, inclined planes, grooves, fossae, pits; buccal ridge

Longer mesial cusp slope, mesial features: marginal groove, developmental depression, deeper CEJ curvature

Mesial and Distal Contact: Just cervical to the junction of occlusal and middle thirds

Bifurcated with root trunk; elliptical on cross section

Front 8

Maxillary 2nd Premolar

Back 8

#4, #13

Calcification: 2-2.5 yrs
Eruption: 12-13
Root Completion: 14-16

Smaller than first, two cusps same length, short central groove, no mesial surface features like first, increased supplemental grooves

Occlusal table with marginal ridges and cusps, with tips, ridges, inclined planes, grooves, fossae, pits; buccal ridge

Lingual cusp offset to the mesial

Mesial and Distal Contact: Just cervical to the junction of occlusal and middle thirds

Single-rooted; elliptical on cross section

Front 9

Mandibular 1st Premolar

Back 9

#21, #28

Calcification: 1.75-2 yrs
Eruption: 10-12
Root Completion: 12-13

Smaller than second, smaller lingual cusp of two, mesial surface features

Occlusal table with marginal ridges and cusps, with tips, ridges, inclined planes, grooves, fossae, pits; buccal ridge

Shorter mesial cusp slope, mesiolingual groove, deeper mesial CEJ curvature

Mesial and Distal Contact: Just cervical to the junction of occlusal and middle thirds

Single-rooted; ovoid or elliptical on cross section

Front 10

Mandibular 2nd Premolar

Back 10

#20, #29

Calcification: 2.25-2.5 yrs
Eruption: 11-12
Root Completion: 13-14

Larger than first, usually three cusps: Y groove pattern or two cusps: H or U groove pattern, increased supplemental grooves

Occlusal table with marginal ridges and cusps, with tips, ridges, inclined planes, grooves, fossae, pits; buccal ridge

Distal marginal ridge more cervically located, thus more occlusal surface visible from distal view

Mesial and Distal Contact: Just cervical to the junction of occlusal and middle thirds

Single-rooted; ovoid or elliptical on cross section

Front 11

Maxillary 1st Molar

Back 11

#3, #14

Calcification: birth
Eruption: 6-7
Root Completion: 9-10

Largest tooth in arch, largest crown in dentition; four major cusps, with buccal cusps almost equal in height; fifth minor cusp of Carabelli associated with mesiolingual cusp and prominent oblique ridge

Occlusal table with marginal ridges, cusps with tips, inclined planes, ridges, grooves, fossae, and pits; buccal cervical ridge

Mesiolingual cusp outline longer and larger but not as sharp as distolingual cusp

Mesial contact: Junction of occlusal and middle thirds

Distal contact: Middle third

Trifurcated roots, with furcations

Front 12

Maxillary 2nd Molar

Back 12

#2, #15

Calcification: 2.5 yrs
Eruption: 12-13
Root Completion: 14-16

Smaller crown than first, heart-shaped or rhomboidal crown outline, thus three or four cusps; oblique ridge less prominent, with mesiobuccal cusp longer than distobuccal cusp and no fifth cusp; distolingual cusp smaller than on first or absent

Occlusal table with marginal ridges, cusps with tips, inclined planes, ridges, grooves, fossae, and pits; buccal cervical ridge

Mesiolingual cusp outline longer and larger but not as sharp as distolingual cusp

Mesial contact: middle third

Distal contact: Middle third

Trifurcated roots, with furcations

Front 13

Mandibular 1st Molars

Back 13

#19, #30

Calcification: Birth
Eruption: 6-7
Root Completion: 9-10

First permanent tooth to erupt, with widest crown mesiodistally of dentition; five cusps, with Y groove pattern and with buccal groove possibly ending in buccal pit

Occlusal table with marginal ridges, cusps with tips, inclined planes, ridges, grooves, fossae, and pits

Distal cusp smallest, with a sharp cusp

Mesial and distal contact: Junction of occlusal and middle thirds

Bifurcated roots, with root trunks, furcation, and root concavities

Front 14

Mandibular 2nd Molars

Back 14

#18, #31

Calcification: 2.5-3 yrs
Eruption: 11-13
Root Completion: 14-15

Smaller crown than first; four cusps with cross-shaped groove pattern

Occlusal table with marginal ridges, cusps with tips, inclined planes, ridges, grooves, fossae, and pits

Difference in height of contour for buccal and lingual from each proximal surface; wider on the mesial than distal

Mesial and distal contact: middle third

Bifurcated roots, with root trunks, furcation, and root concavities