-
what is formed by the junction of TWO crown surfaces (mesial and occlusal=mesio-occlusal)
line angles
-
what are formed by the junction of THREE crown surfaces? (mesial labial incisal = mesiolabioincisal)
point angles
-
what are the three dentition periods?
-
primary dentition: ____mo-____yrs. begins with eruption of primary ___________ _________ incisors. ends with first ________ tooth eruption. _________ grow to accomodate the teeth
- 6 mo- 6 yrs
- mandibular central
- permanent
- jawbones
-
mixed dentition:
_________ and ________ teeth. occurs between ages _____ and _____ years. most growth for _________ this stage! begins with eruption of _____ ________ tooth ends with exfoliation of last _________ tooth. color is whiter due to less dentin (than in adults). ________teeth mature sooner and are lost sooner
- primary and permanent
- 6-12 years
- jawbones!
- 1st permanent
- primary
- females (YEAH LADIES!)
-
permanent dentition:
ages: _____ years (last tooth usually shed)
begins with exfoliation of last __________ tooth. tooth types erupt in ______. if one is missing, find out where it is. eruption times differ. congenitally missing are not usually in _____. impacted teeth are usually _______ molars, and _________ with crowding.
- 12
- primary
- pairs
- pairs
- third molars
- canines
-
these teeth are _____________.
1,2,3,14,15,16,17,18,19,30,31,32
non-succedaneous! (non replacing!)
-
permanent teeth that replace primary teeth (everything but the molars) are termed:
succedaneous!
-
what permanent teeth might you see in a nine year old?
- mand/max centrals
- mand/max 1st molars
- mand/max laterals
-
what permanent teeth might you see in a 7 year old?
- mand/max centrals
- mand/max 1st molars
- mand laterals
-
what is the FIRST permanent tooth in the entire mouth to erupt???
MANDIBULAR 1st MOLARS!
-
what are the congenitally missing teeth?
- mand 2nd premolars
- max lateral incisors
- 3rd molars
-
at what age should someone's first dental appointment be?
one year!
-
a supernumerary tooth found in between #8 and #9 is called:
mesiodens
-
a supernumerary tooth is most commonly found: (3)
- between max centrals
- distal to third molars
- premolar region
-
when does the bud stage begin?
8th week of prenatal dev
-
extensive __________ or growth of the _________ _________ into buds penetrates in the ectomesenchyme. what stage is this?
- proliferation
- dental lamina
- bud stage
-
at the end of proliferation in the bud stage, the max and mand arches of the primary dentition will have _____ tooth buds
10
-
each bud will develop into a _______ _______ and its supporting tissues
tooth germ
-
the basement membrane in the bud stage is between the _______ and growing _________
-
in the bud stage only _________ occurs, no _________ change
-
where teeth will not be forming in the bud stage, the dental lamina only remains thickened and later _________ as developing oral mucosa comes to line the oral cavity
disintegrates
-
the cap stage occurs during the _____ and _____ week of the fetal period
9th and 10th
-
________ _________ in different parts of the tooth bud leads to formation of a cap shape attached to the _______ ________
- unequal growth
- dental lamina
-
what levels of differentiation are active during the cap stage?
- cytodifferentiation
- histodifferentiation
- morphodifferentiation
- (also morphogenesis!)
-
the tooth germ, enamel organ, dental papilla, basement membrane, and dental sac are all present in which stage?
CAP stage!
-
the bell stage occurs during weeks _____ and _____
BELL (eleven and twel)
-
proliferation, differentiation, and morphogenesis occur in what stage?
BELL!
-
the dental sac in the bell stage increases the amt of _______ fibers forming around the ______ _______ and will differentiate into cementum, ______ _______, and ______ bone.
- collagen
- enamel organ
- periodontal ligament
- alveolar bone
-
the OEE in the bell stage serves as a protective barrier for the ________ organ
enamel
-
the more outer star-shaped cells in many layers that form a network within the enamel is called _______ ________. (bell stage)
stellate reticulum
-
what are the three protective barriers in the bell stage?
- OEE
- stellate reticulum
- stratum intermedium
-
the inner cells of the dental papilla (in the bell stage) become:
pulp tissue
-
the outer cells of the dental papilla (bell stage) will become:
(nearest IEE) ondontoblasts that form the dentin matrix
-
what is the function of hertwigs sheath (HERS)?
to shape the root(s) and induce dentin formation in the root so it is continuous with the coronal dentin.
-
what are the rests of malassez and where do they come from?
they are from HERS root sheath disinigrating. located in the mature perio ligament. may become cystic
-
partial anodontia occurs in which teeth?
- max laterals
- mand premolars
- max/mand thirds
-
what stage does anodontia occur?
INITIATION
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