Lecture 2- Tooth Development & Terminology Flashcards
ordering of numbering of permanent dentition
1-32
start in maxillary right quadrant –> maxillary left quadrant –> mandibular left quadrant –> mandibular right quadrant
teeth 8 & 9 are…
maxillary central incisors
teeth 24 & 25 are…
mandibular central incisors
teeth 7 & 10 are…
maxillary lateral incisors
teeth 23 & 26 are…
mandibular lateral incisors
teeth 6 & 11 are…
maxillary canines
teeth 22 & 27 are…
mandibular canines
teeth 4, 5, 12, & 13 are…
maxillary premolars
teeth 20, 21, 28, & 29 are…
mandibular premolars
teeth 1, 2, 3, 14, 15, & 16 are…
maxillary molars
teeth 17, 18, 19, 30, 31, & 32 are…
mandibular molars
ordering of numbering of primary dentition
a-t
start in maxillary right quadrant –> maxillary left quadrant –> mandibular left quadrant –> mandibular right quadrant
vermillion border
sharp junction of the red zone and skin
nasolabial groove
demarcates lip and cheek
philtrum of lip
middle of upper lip
labiomental groove
demarcates lip from chin
oral vestibule
slit like space b/w teeth and lips/cheeks
labial/buccal frena
attachments of the lips and cheeks to the alveolus (bony area surrounding the teeth)
hard palate
anterior 2/3 of palate
*supported by bone
contains:
incisive papilla
rugae
midline palatine raphe
soft palate
posterior 1/3 of palate
contains:
uvula
oropharynx contains
tonsils
anterior & posterior pillars of the fauces
sublingual folds
raised folds where submandibular salivary ducts open
lingual frenum
attaches tongue to the floor of the mouth
when is the first sign of tooth development?
6-7 weeks i.u.
when do deciduous teeth begin to calcify?
13-20 weeks i.u.
when have ALL deciduous teeth begun to calcify?
18-20 weeks i.u.
when do deciduous teeth erupt?
6-30 months
eruption
emergence into the oral cavity
exfoliation
loss of the deciduous tooth
when does exfoliation occur?
shortly before its permanent successor erupts
what teeth are not included in the primary dentition?
premolars
when do deciduous mandibular central incisors erupt?
6-8 months
when do deciduous maxillary central incisors erupt?
10 months
when do deciduous maxillary lateral incisors erupt?
11 months
when do deciduous mandibular lateral incisors erupt?
13 months
when do deciduous maxillary first molars erupt?
16 months (first)
when do deciduous mandibular first molars erupt?
16 months (later)
when do deciduous maxillary canines erupt?
19 months
when do deciduous mandibular canines erupt?
20 months
when do deciduous mandibular second molars erupt?
27 months
when do deciduous maxillary second molars erupt?
29 months
deciduous eruption pattern
incisors –> first molars –> canines –> second molars
deciduous dentition
only deciduous teeth present (up to 6 yrs 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
which teeth are non-succedaneous?
maxillary and mandibular first molars
when do permanent mandibular first molars erupt?
6 years (first)
when do permanent maxillary first molars erupt?
6 years (later)
when do permanent mandibular central incisors erupt?
6-7 years
when do permanent mandibular lateral incisors erupt?
7-8 years
when do permanent maxillary central incisors erupt?
7-8 years
when do permanent maxillary lateral incisors erupt?
8-9 years
when do permanent mandibular canines erupt?
9-10 years
when do permanent maxillary first premolars erupt?
10-11 years
when do permanent mandibular first premolars erupt?
10-11 years
when do permanent maxillary second premolars erupt?
10-11 years
when do permanent mandibular second premolars erupt?
10-12 years
when do permanent maxillary canines erupt?
11-12 years
when do permanent mandibular second molars erupt?
11-13 years
when do permanent maxillary second molars erupt?
12-13 years
when do permanent mandibular third molars erupt?
17+ years
when do permanent maxillary third molars erupt?
17+ years
when is root development completed?
2-3 years after eruption of teeth
formula to determine approximate crown calcification completion time:
1/2 time of eruption and add 1 year
what is the first part of the tooth to calcify?
the crown
should i add when you see first evidence of calcification?