DH 1350 quiz 4 chap 6 part 1 tooth development

which of the following statements are correct when considering odontogenesis

clear cut beginning and end point to the process
does not include the maturation of the dental tissues
parallels the formation of the face
does not have any iddentifiable stages

oral epithelium is derived from ectoderm as  a result of embryonic folding

true of false
True False

the initiation stage of odontogenesis MAINLY involves the process of

differeintitation
proliferation
induction
morphohgenesis

the dental lamina is an embryonic structure that develops from the
oral epithelium
mesenchyme
neural crest cells
endodermal layer

where does the dental lamina begin to form initially in the developing dental arches

near the midline
adajacent to the mental foramen
over the region of the furture molars
adajacent to the developing temporomandi ular joint

how many buds in the dental lamina appear along each dental arch during odontogenesis of the primary dentition

5
10
15
20

order the stages of odontogeneisis

bud
cap
bell
initiation
maturation

match the stages of odontogenesis with the corresonding descriptions

ectoderm lineing of stomodeum gives rise to oral epithelium and then dental lamina
growth of dental lamina penetrates growing ectomesenchyme
formation of tooth germ as enamel organ surrounds inside mass of dental papilla with outside mass of dental sac
differintiation of enamel organ into four cell types and dental papilla into two cell types
dental tissue types secreted in successive layers as matrix
dental tissue types fully mineralize to mature form

cap, apposition, bell maturation,bud, initiation

which stage of tooth development occufrs between the 11th and 12th weeks of prenatal development

bud
cap
bell
initiation

each of the following is a component of the tooth germ EXCEPT one which is it

enamel organ
dental sac
dental lamina
dental papilla
dental follicle

in the development of a tooth the structure called the dental sac is a derivagtive of the

dental lamina
mesoderm (mesenchyme)
ectoderm
dental papilla

the dental sac of a develping tooth germ gives rise to the

outer layer of tooth pulp
the periodontal ligament
the enamel cuticle
the dentin layer of the tooth

which of the folloiwng will be the future pulp and dentin of a tooth

tooth germ
enamel organ
dental sac
dental papilla
none of the above

which primoridial structure differentiates into the ameloblasts that produce enamel

outer enamel epithelium
stellate reticulum
inner enamel epithelium
stratum reticulum

which of the following does not come from the mesoderm embryonic layer

alveloar bone
dentin and pulp
cementum
peroidontal ligament
none of these

enamel develops from which of the following embryonic tissues

ectoderm
mesoderm
endoderm
ectomesenchyme
both ectomesenchyme and ectoderm

which of the following serves as a  support for enamel production

stellate reticulum
IEE
basement memberane
outer cells of the dental papilla
none of the above

which of the following embryonic structures becomes the dentinoenamel junction (DEJ)

inner cells of the dental papilla
outer cells of the dental papilla
outer enamel epithelium of the enamel organ inner enamel epitheliuym of the enamle organ
the basement memberane between the enamel organ and dental papilla

the outer cells of the dental papilla are induced to differeintiate into

pulp tissue
preameloblasts
odontoblasts
ementoblasts
ameloblasts

which developmental distubance appears as a tooth within a tooth on radiologic examination

fusion
tubercles
gemination
dens in dente

a tooth with gemination will display to pulp chambers and two roots on a radiograph

true or false
True False

after the inner enamel epithelium differeintitates into preameloblasts the outer cells of the dental papilla are induced by the preameloblasts to differentiate into ameloblasts

true of false
True False

enamel hypocalcification is a type of enamel dysplasia that involves

an increased number of ameloblasts
reduction in the quantity of enamel matrix
reduction in the quality of enamel maturation
extrinsic staining of the dental cutilce on the enamel surface

which of the following structures is NOT part of the enamel organ

stellate reticuluml
stratum intermediium
ondontoblastic layer
outer epithelial cells
inner epithelial cells

which of the following changes occurs to those speicific cells fromthe enamel organ which will differeintiate into preameloblasts

they shorten their lenght
they repolarize their nuclei
they mineralize cellular contents
they line up along the basement memberane

the dental sac of a developing tooth germ gives rise to the

outer layer of tooth pulp
the periodontal ligament
the enamel cuticle
the dentin layer of the tooth

nonsuccedaneous permanent teeth develop from buds that grow off an extension of the

successional dental lamina
palatal shelves
intermaxillaary segement
lingual portion of the initial dental lamina
primary second molars dental lamina