Embryology

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What is the space between each of the enamel rods called?

interprismatic region
what embryonic tissue does enamel develop from?

ectoderm
what is the chemical formula for calcium hydroxyapatite?

Ca₁₀(PO₄)₆OH₂
What is the shape of the enamel rods produced by tome's process?

hexagonal
ename rods run_______to the DEJ

perpendicular
the raised scale-like pattern of enamel

Imbrication lines
accentuated incremental lines because of the trauma at birth

neonatal line
the grooves between each of the scales

perikymata
incremental lines showing that enamel is secreted cyclically

lines of Retzius
enamel matrix is first formed at the______edge of the tooth

incisal
if your enamel is wearing away because of tooth to tooth contact, it is called what?

attrition
if the enamel is being decalcified by the waste produts of cariogenic bacteria, it is called what?

caries
if enamel is wearing away caused by contact with some sort of non-tooth structure (like a bobby pin or a toothbrush) is called what?

abrasion
if the enamel just breaks off at the cervical margin of the tooth, it is a weird condition called what?

abfraction
if some sort of chemical is wearing away your enamel (usually stomach acid) it is a condition called what?

erosion
where does most stain collect, and therefore, where bleaching is most active?

interprismatic region
etching removes the organic portions of the enamel to open gaps for sealant material to adhere to, this is a________ attachment

mechanical
Why does bleachinc cause sensitivity?

because the bleach reaches down to the dentin which has dentinal tubules that reach to, and send signals to the pulp which contains nerves

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Author

sthomp88

51044

Card Set

Embryology

Description

Ch. twelve 8

Updated

2010-12-06T07:11:24Z

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