Terminal Chronology Flashcards by sophie rosen

apical vs cervical vs incisal

apical: toward the top, root
cervical: the gum side of the tooth
incisal: the bottom of the tooth

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what is the universal numbering system?

numbering the teeth 1-32

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each tooth is numbered – to – in the permanent dentition

1-32

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which teeth are your permanent central incisors?

8, 9

24, 25

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which teeth are your permanent lateral incisors?

7, 10

23, 26

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which teeth are your permanent canines?

6, 11

22, 27

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which teeth are your permanent premolars?

4, 5, 12, 13

20, 21, 28, 29

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which teeth are your permanent molars?

1, 2, 3, 14, 15, 16

17, 18, 19, 30, 31, 32

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each primary tooth is labeled – to –

a to t

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vermilion zone

lips

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vermilion border

sharp junction of the red zone and skin

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nasolabial groove

demarcates lip and cheek

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philtrum of lip

middle of upper lip

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angle/corner of the mouth/commissure

the corner of the mouth

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labiomental groove

the indent below the lip

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oral vestibule

the slit like space between the lips/cheek

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labial/buccal frena

attachments of the lips and cheeks to the alveolus (bony area surrounding the teeth)

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what composes the hard palate? (3)

incisive papilla
rugae
midline palatine raphe

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what composes the soft palate? (1)

uvula

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what composes the oropharynx? (3)

tonsils
anterior (palatoglossal arch)
posterior (palatopharyngeal arch) pillars of the fauces

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what composes the floor of the mouth? (2)

sublingual folds

lingual frenum

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sublingual folds

raised folds where submandibular salivary ducts open

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lingual frenum

attached the floor to the mouth

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why is eruption time and exfoliation time important?

to asses the patients dental age 
-is the child's dental development within normal range?
important for dental procedures 
-endodontic therapy
-decision of whether to extract or retain a primary tooth 
medications
-tetracycline, fluoride 
forensics

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the first sign of tooth development is at

6-7 weeks i.u.

deciduous teeth begin to calcify at

13-20 week i.u.

by ---., all deciduous teeth have begun to calcify

18-20 weeks i.u

deciduous teeth erupt at

6-30 months

eruption

emergence into the oral cavity

exfoliation

loss of the deciduous tooth

time of deciduous eruption: | mandibular central incisors

6-8 mo

time of deciduous eruption: | maxillary central incisors

10 mo

time of deciduous eruption: | maxillary lateral incisors `

11 mo

time of deciduous eruption: | mandibular lateral incisors

13 mo

time of deciduous eruption: | maxillary first molar

16 mo (first)

time of deciduous eruption: | mandibular first molar

16 mo (later)

time of deciduous eruption: | maxillary canine

19 mo

time of deciduous eruption: | mandibular canine

20 mo

time of deciduous eruption: | mandibular second molar

27 mo

time of deciduous eruption: | maxillary second molar

29 mo

deciduous eruption pattern

incisors, first molars, canines, second molars

deciduous dentition

only deciduous teeth present (up to 6 years of age)

mixed dentition

mixture of deciduous and permanent teeth present

permanent dentition

only permanent teeth present

succedaneous teeth

permanent teeth that replace deciduous teeth

non-succedaneous teeth

permanent teeth that do not replace deciduous teeth

where does the deciduous tooth root go?

it is worn away by the emerging permanent tooth

times of eruption of permanent teeth: | mandibular first molars

6 years (first)

times of eruption of permanent teeth: | maxillary first molars

6 years (later)

times of eruption of permanent teeth: | mandibular central incisor

6-7 years

times of eruption of permanent teeth: | mandibular lateral incisor

7-8 years

times of eruption of permanent teeth: | maxillary central incisor

7-8 years

times of eruption of permanent teeth: | maxillary lateral incisor

8-9 years

times of eruption of permanent teeth: | mandibular canine

9-10 years

times of eruption of permanent teeth: | maxillary first premolar

10-11 years

times of eruption of permanent teeth: | mandibular first premolar

10-11 years

times of eruption of permanent teeth: | maxillary second premolar

10-11 years

times of eruption of permanent teeth: | mandibular second premolar

10-12 years

times of eruption of permanent teeth: | maxillary canine

11-12 years

times of eruption of permanent teeth: | mandibular second molar

11-13 years

times of eruption of permanent teeth: | maxillary second molar

12-13 years

times of eruption of permanent teeth: | mandibular third molar

17+ years

times of eruption of permanent teeth: | maxillary third molar

17+ years

two non-succedaneous teeth

mandibular and maxillary first molars

root development is completed -- to -- years after eruption of teeth

2-3

calcification of crown of teeth are completed

1/2 time of eruption and add 1 year

first part of the tooth to calcify is the

crown

first evidence of calcification of permanent teeth: | 8, 9

3-4 mo

first evidence of calcification of permanent teeth: | 7, 10

10-12 mo

first evidence of calcification of permanent teeth: | 6, 11

4-5 mo

first evidence of calcification of permanent teeth: | 5, 12

1.5-1.75 yr

first evidence of calcification of permanent teeth: | 4, 13

2-2.5 yr

first evidence of calcification of permanent teeth: | 3, 14

at birth

first evidence of calcification of permanent teeth: | 2, 15

2.5-3 yr

first evidence of calcification of permanent teeth: | 1, 16

7-9 yr

first evidence of calcification of permanent teeth: | 24,15

3-4 mo

first evidence of calcification of permanent teeth: | 23, 26

3-4 mo

first evidence of calcification of permanent teeth: | 22, 27

4-5 mo

first evidence of calcification of permanent teeth: | 21, 28

1.5-2 yr

first evidence of calcification of permanent teeth: | 20, 29

2,25-2,5 yr

first evidence of calcification of permanent teeth: | 19, 30

at birth

first evidence of calcification of permanent teeth: | 18, 31

2.5-3 yr

first evidence of calcification of permanent teeth: | 17, 32

8-10 yr