Development and eruption Flashcards
Which population often has shovel shaped incisors?
Asian/Native Alaskan Populations
What does chronological eruption indicate?
Age and Development of Dentition
Is there a lot of variability regarding tooth formation, shape, size, color, etc. that dentists need to adapt to?
Yes
If one has less developed enamel, are they more or less susceptible to decay?
More
What is enamel hypoplasia?
Pitting/holes due to malformation of enamel
What is systemic fluorosis?
Over exposure to fluoride
Hypocalcifications can give what?
can give a basis for estimating time of defect
True or False: Eruption is only defined as a tooth’s emergence through gingiva
FALSE- also includes until it makes contact with opposing arch
When does a tooth stop erupting?
When it makes occlusal contact with opposing tooth
What is a synonym for eruption?
Emergence
How long does it take for primary dentition to be completed?
2-3 years
What is another name for enamel organ?
Dental Organ
What is the origin of the developing tooth, that is responsible for initiation of dentin formation, formation of enamel, and establishment of the shape of tooth’s crown?
Enamel organ
Does the Enamel Organ develop at the same time and rate?
no
Is it possible for some of the primary teeth to have root resorption while the crown is still developing?
Yes
What is more resistant to environmental influences, crown or root formation?
both are resistant
After the crown development ends, the root development forms the cementum at the cervix which covers what?
Dentin
Is the cementum more or less calcified than dentin?
less
When is permanent dentition formation fully formed, including third molars?
18-25 years of age
What is another name for primary teeth?
Deciduous
What stage of dentition can a dentist detect and prevent problems before permanent dentition sets in?
Mixed dentition
What week of gestation does teeth start to develop?
6TH WEEK
What week does calcification of primary teeth occur?
13-16 weeks
When is crown formation complete in primary dentition?
3 to 10.5 months
Does primary dentition have more or less space in the mouth?
Typically more space
When does the adult dentition start?
12-15 years
What is the eruption sequence in primary teeth typically?
Central Incisor, Lateral Incisor, 1st Molar, Canine, 2nd Molar
When does mixed dentition begin?
eruption of the mandibular first molar 6-7
When does mixed dentition end?
Loss of last primary tooth (11-12)
True or false: if you remove a baby tooth prematurely, you may slow down permanent tooth eruption
true
When is adult dentition complete?
18-25 years
How many lobes/centers of formation does each tooth develop from?
4 or more
When canines and incisors of permanent dentition are coming in, are they lingual or labial to the primary roots of corresponding tooth?
lingual to
Where do permanent premolars erupt between?
within the bifurcation/trifurcation of primary molars
Are the size of teeth genetically determined?
Can be
Who have the smallest teeth?
Saami
Who have the largest teeth?
Australians
What is a CT organ inside of dentition, that is soft tissue, and essential for tooth development, but once the root is completed the ability for blood to pass is restricted?
Dental pulp
What happens to the pulp cavity with age?
small and more constricted
Where does the gum tissue stop?
cej
Is there gum tissue that continues across the attachment at the CEJ?
yes
What is the gingiva called that comes up as a collar?
free gingival margin
How do you relate the position of the gingival margin and attachment to the CEJ?
periodontal probe
What should be the distance between the bone height and the free gingival margin?
3 mm- if its greater, this may be a sign of periodontal disease
What is dental age based on?
Formation and eruption of teeth
