what is formed by the junction of TWO crown surfaces (mesial and occlusal=mesio-occlusal)
what are formed by the junction of THREE crown surfaces? (mesial labial incisal = mesiolabioincisal)
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
_________ 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
females (YEAH LADIES!)
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.
these teeth are _____________.
non-succedaneous! (non replacing!)
permanent teeth that replace primary teeth (everything but the molars) are termed:
what permanent teeth might you see in a nine year old?
mand/max 1st molars
what permanent teeth might you see in a 7 year old?
mand/max 1st molars
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
at what age should someone's first dental appointment be?
a supernumerary tooth found in between #8 and #9 is called:
a supernumerary tooth is most commonly found: (3)
between max centrals
distal to third molars
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?
at the end of proliferation in the bud stage, the max and mand arches of the primary dentition will have _____ tooth buds
each bud will develop into a _______ _______ and its supporting tissues
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
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 _______ ________
what levels of differentiation are active during the cap stage?
the tooth germ, enamel organ, dental papilla, basement membrane, and dental sac are all present in which stage?
the bell stage occurs during weeks _____ and _____
BELL (eleven and twel)
proliferation, differentiation, and morphogenesis occur in what stage?
the dental sac in the bell stage increases the amt of _______ fibers forming around the ______ _______ and will differentiate into cementum, ______ _______, and ______ bone.
the OEE in the bell stage serves as a protective barrier for the ________ organ
the more outer star-shaped cells in many layers that form a network within the enamel is called _______ ________. (bell stage)
what are the three protective barriers in the bell stage?
the inner cells of the dental papilla (in the bell stage) become:
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