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what is the correct sequence of words when describing a tooth based on D-A-Q-T system?
- D- Dentition
- A- Arch
- Q- quadrant
- T- tooth type
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What are the Quadrants
- looking for left or right
- (already stated maxillary or mandibular)
- I maxillary right
- II maxillary left
- III mandibular left
- IV mandibular right
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What are the tooth types?
- Permanent Dentition Primary Dentition
- central incisors
- lateral incisors
- canines
- 1st & 2nd pre molars 1st & 2nd molars
- 1st, 2nd & 3rd molars
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CEJ what does this stand for?
what meets here?
what does it look like?
- cementoenamal junction
- the enamel of the crown and cementum of the root
- external line at the neck or cervix of the tooth
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there are 3 possible interfaces at the CEJ what are they?
- cementum over the neck fo each tooth may overlap the enamel
- the enamel may meet the cementum edge to edge
- small area of underlying dentin may be exposed because of gap between the enamel and cementum
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anatatomical crown is?
clinical crown is?
the part covered by enamel (constant)
part of the anatomical crown that is visible and not covered by the gingiva (can change over time)
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there is an accepted sequence of combined names of involved surfaces.
with mesial and distal which comes first?
and do these procede all other terms?
- mesial comes before distal always
- yes these are always first
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mesial or distal comes first then
what 3 terms come next?
labial, buccal and lingual follow
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after mesial and distal
labial, buccal and lingual follow they always precede
what two terms?
incisal or occlusal in any combination
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when labeling the first word always change distal & medial to? labial, buccal & lingual?
If following a vowel such as on occlusal what do you do?
- disto, mesio, labio, bucco & liguo
- hyphenate (mesio-occlusal)(bucco-occlusal)
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Dentition Periods
Primary
begins with the eruption of?
ends when the ?
this period occurs between?
full eruption is completed at?
- primary mandibular central incisors
- first permanent tooth erupts, usually the permanent mandibular first molar
- 6 months and 6 years
- 30 months
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Dentition Periods
Mixed
begins with the eruption of?
ends when the?
this period occurs between?
- first permanent tooth permanent mandibular first molar
- last primary tooth is shed at age 11 or 12
- 6 and 12 years of age
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Dentition Periods
Mixed
Why are the primary crowns lighter than the darker permanent crowns?
perm teeth have less opaque enamel, thus the underlying yellow dentin is more visible.
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Dentition Periods
Mixed
do males or females shed primary teeth faster and why?
females because the earlier overall physical maturation achieved.
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Dentiton Period
Permanent
begins with?when?
includes all what teeth except?
tooth types erupt in -----?
- shedding of the last primary tooth. after age 12
- all permanent teeth except teeth that are congenitally missing or impaced and cannot erupt usually involving the third molars (age 17-21).
- pairs
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Tooth types and fuctions
Incisors
biting and cutting
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tooth types and functions
canines
piercing and tearing
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tooth types and fuctions
premolars
- assist canines- pierce and tear
- assist molars- grinding food
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tooth types and fuctions
molars
grinding food
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compared with permanent teeth primary teeth have
- relatively short crown
- relatively longer roots
- large pulp horns and chambers
- thinner dentin
- whiter enamel
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clinical consideration with the primary dentition
placeholders for?
increased risk of ----- during restoration.
- permanent teeth
- pulpal exposure
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clinical considerations with the primary dentition
------ progressing caries
anodontia is?
- rapidly
- retained primary teeth
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clinical considerations with the primary dentition
nasmyths membrane is?
agressive perio is?
- tissue membrane on perminant teeth (yellow) must be polished off
- inflam or bone loss with little dental biofilm
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Bifurcated teeth
what is this?
- most maxillary first premolars are bifurcated, having two root branches in the apical third, with a buccal root and a lingual root.
- other premolars are single rooted.
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