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81 Cards in this Set
- Front
- Back
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V shaped valley
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sulcus
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inclines of sulcus meet
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developemental groove
or extend outward to cusp tip |
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lingual surface of incisors
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linual fossa
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occlusal surface of molars
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central fossa
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formed by converging ridges terminting at central point in bottom of the depression
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central fossa
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found on molars/PM slightly distal/mesial to marginal ridges
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triangular fossa
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jxn of dev grooves
or at terminals of grooves |
pits
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narrow channel/crevice
formed @ depth of dev groove |
fissure
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caries begin
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deep fissures/pits
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loss of proximal contact may result in
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perio disease
malocclusion food impaction drifting of teeth |
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develop in groups of 3
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mamelons
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originate from 4 lobes
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mamelons
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mamelons so noticeable bc
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made of pure enamel
no dentin underneath |
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translucent mamalons
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thinnes
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sharp defined
shallow linear depression |
dev grooves
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separate primary parts of crown or root
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dev grooves
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escape way for cusps during
LATERAL/PROTRUSIVE motions |
dev grooves
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separate lobes/cusps
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dev grooves
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buccal/lingual grooves=
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dev grooves
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jxn of dev grooves
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find pits
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portion of gingiva that fills interpox space
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interdental space
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collar of tissue not attached to tooth/alveolar bone
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free gingiva
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ridge only on
MAX MOLARS |
oblique ridge
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oblique ridge is union of
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1-distal cusp ridge of MLC
2-triangular ridge of DBC |
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labial surface of canine
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labial ridge
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buccal surface of PM
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buccal ridge
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all primary teeth
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cervical ridge
runs M-D on cervical 1/3 |
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incisor/canine
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marginal ridge
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posterior teeth
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triangular ridge
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projects from cusp tip to central groove
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triangular ridge
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union of
lingual triangular ridge of BC buccal triangular ridge of LC |
transverse ridge
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runs from buccal surface to lingual surface
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transverse ridge
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union of 2 triangular ridge
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=transverse ridge
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descend from tips of cusps to central part of occlusal
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triangular
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triangular ridges on
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molar
PM |
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occur btw
ML and MB DL and DB on molars |
transverse ridge
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btw
buccal / lingual on PM |
transverse ridge
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transverse ridge very common on
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mand molars
max PM |
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special bout
max molars |
oblique ridge
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oblique ridges alway run btw
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1-DBC
2-MLC |
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oblique ridge formed by
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1-DC ridge of MLC
2-triangular ridge of DBC |
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minimum # of lobes a tooth dev from
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4
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tooth dev begins
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increase cell activity in
growth centers in tooth germ |
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lobes=
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primary centers of calcification
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2 labial lobes
1 lingual lobe |
anterior teeth
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3 labial
i lingual |
PM
except mand PM2 |
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2 buccal
2 lingual |
mand PM2
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5 lobes
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M1
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4 lobes
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M2
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cervical 1/3 of lingual surface
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cingulum
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how many line angles of posteriors
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8
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what is nonexistent on anteriors
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mesio-incisal line angles
disto-incisal line angles *called* mesial incisal angles only |
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line angles of anteriors
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6
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protect interdental papilla
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MB line angles
DB line angles |
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linear elevation
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ridge
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mesial/distal marginal ridges
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on all teeth
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largest occlusal embrassure
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max caninie & PM1
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mand canine PM
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pronounced dev goove
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ectomesenchyme>
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dental lamina induced to prolif into a tooth bud
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primitive oral cavity
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stomodeum
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stomodeum lined by ectoderm >
ectoderm > |
dental lamina
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5-6th wk in utero
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dental lamina
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underlying mesenchyme contains
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ectomesenchyme
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induces oral epi to initiate tooth dev
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ectomesenchyme
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determines what tooth bud will become
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ectomesenchyme
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determines location of tooth in alveolar ridge
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ectomesenchyme
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tooth germ complete
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end of cap stage
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3rd stage of odontogenesis
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cap stage
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oral epi >
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enamel organ
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ectoderm >
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enamel organ
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four layer of enamel organ
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outer enamel epi
inner enamel epi stratum intermedium stellate reticulum |
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enamel organ >
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1-enamel
2-herwig's epi root sheath |
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ectomesenchyme >
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dental sac
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neural crest cells >
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mesenchyme=ectomesenchyme
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dental sac >
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cementum
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PDL from
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dental sac
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alveolar bone proper from
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dental sac
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dental papilla from
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ectomesenchyme
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neural crest cells
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ectomesenchyme
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dental papilla >
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1-dentin
2-dental pulp |
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outer cells of dental papilla >
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odontoblasts = dentin forming cells
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