-
what is tooth development called?
odontogenesis
-
what are the three types of dentition?
- primary dentition
- secondary dentition
- mixed dentition
-
what is primary dentition?
20 baby teeth that develop during the prenatal period and will be shed
-
what is secondary dentition?
32 adult teeth that develop during fetal period, though they mature for years after birth, will replace baby teeth
-
what is mixed dentition?
overlapping of time between primary and secondary dentitions
-
what is the main developmental process that occurs during the initiation stage?
induction
-
During the _____ stage the ____ _____ grows deeper into the ______ and forms a new layer called the _____ _____
- initiation
- oral epithelium
- ectomesenchym
- dental lamina
-
what is the "velcro between the oral epithelium and ectomesenchyme?
basement membrane
-
what is mesoderm that originally comes from the ectoderm?
ectomesenchyme
-
what does the oral epithelium come from?
ectoderm
-
what are the layers during the initiation stage?
- oral epithelium
- ectomesenchyme
- basement membrane
-
what are the developmental disturbances for the initiations stage?
- Anodontia
- suppernumary teeth
-
what disturbances is the absence of teeth and what stage are they from?
- anodontia
- initiation stage
-
what disturbance is extra teeth and what stage are they part of?
- supernumary teeth
- initiation stage
-
what is the second stage in tooth development?
bud stage
-
what developmental process makes up the bud stage?
proliferation only
-
what happens during the bud stage?
the finger like projection full of dental lamina starts to fatten up and look like a bud
-
what are the developmental disturbances during the bud stage?
-
what is macrodontia and what stage is it from?
- big teeth because of too much proliferation
- bud stage
-
what is microdontia and what stage is it from?
- little teeth not enough proliferation
- bud stage
-
what is the third stage of tooth development?
cap stage
-
what developmental processes are involved in the cap stage?
- proliferation
- differentiation
- morphogenesis
-
the cells start ______ to become structurally/functionally different, what do they become?
- Differentiating
- enamel organ
- dental papilla
- dental sac
-
what does the enamel organ come from and what will it produce?
-
what does the dental papilla come from and what will it become?
- ectomesenchyme
- pulp and dentin
-
what does the dental sac come from? what will it become?
- ectomesenchyme
- cementum, periodontal ligament and alveolar bone
-
what three structures make up the tooth germ?
- enamel organ
- dental papilla
- dental sac
-
what is the first sign of morphogenesis?
the tooth germ-created a structure
-
what is the finger like projection that will be the adult tooth?
successional dental lamina
-
what is it called when adult teeth replace baby teeth?
succedaneous
-
what are adult teeth that don't replace baby teeth?
nonsuccedaneous
-
what are the developmental disturbances during the cap stage?
- dens in dente
- gemination
- fusion
-
what disturbance is a tooth within a tooth, the enamel organ gets lost in the dental papilla?
dens in dente-forms enamel in the pulp
-
what is a single tooth unsuccussfully tries to split into two?
gemination-large single rooted tooth with two crowns
-
what is it called when two tooth germs fuse together?
fusion-one crown two roots
-
what is the fourth stage in tooth development?
bell stage
-
through further _____ we now have new layers, what are these layers?
- differentation
- outer enamel epithelium
- stellate reticulum
- stratum intermedium
- inner enamel epithelium
- basement membrane
- outer cells of dental papilla
- inner cells of dental papilla
-
what layer is the protective barrier during enamel formation?(cap stage)
outer enamel epithelium
-
what are the star shaped cells that support enamel production?
stellate reticulum
-
what layer is compressed layer of flat cells that support enamel production?
stratum intermedium
-
what layer in the cap stage will become the enamel secreting cells and what are these cells called?
- inner enamel epithelium
- ameloblasts
-
what layer in the cap stage willl become the dentinoenamel junction?
basement membrane
-
what layer in the cap stage will become the dentin secreting cells? what are these cells called?
- outer cells of dental papilla
- odontoblasts
-
what layer in the cap stage will become the dental pulp?
inner cells of dental papilla
-
what is the fifth stage of tooth development?
apposition
-
what is apposition?
growth by layers-layers of dentin, cementum and enamel
-
the ameloblasts and odontoblasts lie on either side of the _____ _____. as they each retreat they leave a slimy trail called ____. This is the structural foundation that is mineralized during the ____ _____.
- basement membrane
- matrix
- maturation stage
-
where do the cell bodies remain?
dental pulp
-
the odontoblasts leave attaced cellular extenstions called _____ ____, they are contained and prtected in mineralized cylinders of dentin called _____ ______.
- odontoblastic processes
- dentinal tubules
-
what are the developmental disturbances during apposition and maturation?
- enamel dysplasia-enamel hypoplasia and enamel hypocalcification, floursis
- amelogenesis imperfecta
- dentin dysplasia
- dentinogenesis imperfecta
-
what disturbance is a decreased QUANTITY of enamel matrix?
enamel hypoplasia
-
what disturbance is it when there is plenty of enamel matrix but the QUALITY is bade because it didn't fully mineralize?
enamel hypocalcification
-
what is fluorosis?
too much fluoride during mineralization
-
what disturbance is it when there is very thin or no enamel?
amelogenesis imperfecta
-
what disturbance is it when there is faulty development of the dentin?
dentin dysplasia- can be hypoplasia or hypocalcification
-
what disturbance is it when the teeth are blue-gray or brown because the dentin didn't form correctly?
dentinogenesis imperfecta
|
|