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45 terms

Dentistry: Tooth Origin and Formation

STUDY
PLAY
deciduous teeth
The 20 teeth that begin to erupt around the age of 6 months. Eventually pushed out by the permanent teeth.
dentition
arrangement of teeth
succedaneous
permanent teeth
odontogenesis
formation and the origin of the tooth
Initiation
1st stage of development; fifth-sixth week in utero
Proliferation
2nd growth stage; reproduction of new parts; buds or cap stage
Histodiferentiation
3rd stage( part 1); branch into different tissues
Morphodifferentiation
3rd growth stage ( part 2); change into different shape
Apposition
4th growth stage; addition of parts; mineral salts and organic matter are set down for tooth formation
Calcification
5th growth stage; hardening and setting of tooth tissues
Eruption
6th growth stage; tooth breaks through the gums
Attrition
Final (7th) stage of growth; teeth interact through mastication and speech, surfaces wear away
Adontia
partial or total lack of teeth
dens in dente
tooth in tooth
dentinogenesis
weakened or gray colored teeth or shell teeth resulting from poor formation
fluorosis
'mottled enamel' reaction of overfluoridation
fusion
union of tooth buds resulting in a large crown or root
germination
single tooth germ separates to form two crowns on a single root
Hutchinson incisors
rounded or peg-shaped small teeth caused by maternal syphilis during formation
hypocalcifiation
lack of hardening of tooth tissue resulting in weak susceptible teeth
hypoplasia
enamel hypoplasia is lack of enamel covering
macrodontia
abnormally large teeth
microdontia
abnormally small teeth
peg-shaped teeth
small teeth; usually occurs in maxillary lateral teeth
supernumerary
more than normal amount of teeth
enamel
hard tooth covering; 96% inorganic
cuticle (Nasmyth's membrane)
tissue layer covering tooth surfaces wears away soon after eruption
stripes of Retzius
brownish line in enamel
lamellae
cracks or imperfections
Dentin
main tissue surrounding the pulp; 70% INORGANIC
Pulp
soft vascular tooth tissue; found in the center of the tooth; most organic; functions: nourishment, defense, registation of sensation/pain, and dentin protection
pulpitis
toothache
pulp stones (denticles)
a small tooth growth
Cementum
55% inorganic tissue covering of the tooth root
periodintal
membrane, fibers which anchor the tooth in the alveolar socket
odontology
the study of teeth and there care
arch
half of the mouth; maxillary or manibular
quadrant
half of an arch; right or left (8teeth)
incisor
single rooted anterior tooth with cutting edge
cuspid
(canine) single-rooted anterior tooth at the corner of mouth
premolar
(bicuspid) 4th & 5th tooth posterior from the center of the mouth
molar
most posterior teeth, used for grinding; maxillary have three roots, mandibular have two
crown
top part; contains the pulp tooth chamber, dentin &enamel covering
root
bottom part
cervical line
enamel of crown meets cementum of the root