Term
| when does the neck begin to form |
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Definition
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Term
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Definition
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Term
| what does the anterior portion of the forgut form? |
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Definition
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Term
| there are _ pairs of tissues swellings at week four inferior to the stomadeum called branchial/pharangeal arches. |
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Definition
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Term
| what is the 1st branchial arch? |
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Definition
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Term
| 1st and 2nd branchial arches become |
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Definition
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Term
| branchial arches 3,4,5,6 become |
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Definition
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Term
| the second branchial arch has the hyoid arch which is also known as ________ cartilage? |
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Definition
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Term
| the formation of the hyoid bone that is innervated by the 9th cranial nerve comes from which branchial arch? |
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Definition
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Term
| most of the laryngeal cartilage that are innervated by the 9th and 10th cranial nerve come from which arches |
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Definition
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Term
| what causes the vault of the hard palate? |
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Definition
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Term
| what creates the canines and posterior teeth and uvula? |
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Definition
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Term
| what creates the incisors and laterals and partial separation between developing nasal and oral cavities? |
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Definition
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Term
| when is the tongue developing |
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Definition
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Term
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Definition
the first 4 branchial arches
the body of the tongue from 1st and base from 2, 3, and 4 |
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Term
| the body of the tongue comes from what 4 swellings? |
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Definition
1 middle tuberculum impar
2 swellings on side lateral lingual swellings
and 1 behind lateral lingual called copula |
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Term
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Definition
small depression behind circumvallate papilla
it is also the point of embryonic origin of the thyroid gland |
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Term
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Definition
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Term
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Definition
| tongue not free of frenum |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| large tongue, hard to eat and breathe |
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Term
| what is the tissue of origin for enamel? |
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Definition
| the IEE inner enamel epithelium |
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Term
| what separates the IEE from the OEE |
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Definition
| basement membrane separates them |
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Term
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Definition
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Term
| tooth buds start to form at week |
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Definition
| week 8 is tooth bud stage |
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Term
| what are some problems that develop in bud stage |
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Definition
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Term
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Definition
week 9+10
enamel comes from ectoderm
differentiatio and morphogenesis |
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Term
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Definition
outer enamel epithelium
protective layer |
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Term
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Definition
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Term
| what are 3 layers of cap stage |
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Definition
enamel organ
dental papilla-will become future dentin
dental sac-will form alveolar bone and blood supply |
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Term
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Definition
| single tooth unsuccessfully tries to divide |
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Term
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Definition
| union of two adjacent tooth germs |
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Term
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Definition
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Term
| what kind of cells are OEE |
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Definition
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Term
bells stage basement membrane no longer exists
true/false |
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Definition
| true basement membrane is gone it is now DEJ |
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Term
| what is the process that secretes enamel matrix |
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Definition
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Term
| when is the palate complete? |
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Definition
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Term
| what is also known as the premaxilla |
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Definition
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Term
enamel comes from which tissue
ectoderm, mesoderm or endoderm? |
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Definition
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Term
| what is the structure found in both enamel and dentin? |
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Definition
| hydroxyapetite crystals that calcify |
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Term
| what is the outline of the enamel rod? |
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Definition
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Term
| what is responsible for laying down the pattern for enamel? |
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Definition
tomes process
new enamel is squirted about every 4 days |
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Term
| what are the lines created during the pattern process from the tomes process |
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Definition
| striae of retzium: they form out occlusally from DEJ |
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Term
| where the lines of retzius end and are shallow they are called? |
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Definition
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Term
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Definition
primary enamel cuticle it is the last thing made by ameloblasts it stains easily.
it occurs when the IEE and OEE compress together |
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Term
| what occurs right after nasmyths membrane when oee flattens? |
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Definition
| reduced enamel epithelium |
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Term
| normal to thin enamel that is yellow to gray is called? |
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Definition
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Term
| spots that appear white to whitish yellow signifies insufficient growth of enamel crystals that did not pack tightly together, this condition is called? |
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Definition
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Term
| cracks in enamel from trauma or developmental issues are called? |
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Definition
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Term
| when enamel extends into dentin it is called |
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Definition
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Term
| when odontoblasts are on enamel side |
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Definition
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Term
| the start of root development after the crown has finished forming is called |
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Definition
cervical loop:"
it grows into dentinal sac
moves away from completed crown
then forms hertwigs sheath |
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Term
| what is the tissue that origins from the cervical loop and is responsible for root pattern and development? |
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Definition
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Term
hertwigs sheath shapes the root
true/false |
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Definition
true hertwigs sheath shapes root.
it induces formation of dentin into root |
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Term
what is the most abundant tissue found in tooth is it :
enamel
cementum
or dentin |
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Definition
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Term
| is there stellate reticulum or stratum reticulum in root |
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Definition
| no reticulum in root (thus no enamel formation in root) |
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Term
| what can happen when hertwigs sheath does not disintigrate? |
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Definition
rests of malassez (left over hertwigs sheath)
could become cyst and cause problems.
usually around 3rd molars and mandibular canines all cells must be removed of cyst or fractured jaw could be result |
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Term
| where are enamel pearls most often seen: |
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Definition
furcations of molars
from lost ameloblast on root |
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Term
| when cementum starts laying down over dentin the ______ is formed |
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Definition
| DCJ (dentinocementum junction) |
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Term
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Definition
| union of root structures of 2 or more teeth usually happens to maxillary molars, can be caused by injury |
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Term
pdls are formed from which tissue?
ectoderm, mesenchymal, endoderm |
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Definition
| mesencymal tissue makes pdls. |
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Term
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Definition
| distortion of hertwigs sheath due to injury or pressure |
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Term
| what is the cause for differentiation of root what makes them split? |
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Definition
| hertwigs sheath is responsible for splitting of roots. |
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Term
| what is the inflammatory response as a result of tissue disintegration? |
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Definition
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Term
| what is responsible for bone resorption |
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Definition
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Term
| what is responsible for new bone |
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Definition
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Term
| what are common cysts that develop around unerupted teeth and can happen when hertwigs sheath does not disinigrate properly |
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Definition
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