-
enamel is a crystalline structure made up of mostly what substance?
calcium hydroxyapatite
-
What percent of enamel is mineralized by:
inorganic material
organic material
water
-
What is the hardest substance in the body?
enamel
-
true or false. enamel is avascular and has no nerves, and it is non-vital and not renewable
both statements are true
-
Enamel produces a hard substance that is useful in __________ and_________
-
What does enamel look like, color wise?
shades of bluish white (it looks yellow because of the dentin underneath it
-
process of enamel matrix formation that occurs during the apposition stage
amelogenesis
-
Enamel is first secreted at the __________ _____________ and continues in ____________
- incisal edge
- waves (like a volcano)
-
cells that are derived from the IEE, produce the enamel matrix, secrete the enamel matrix from the tome's process, and differentiate ONLY in the crown
ameloblasts
-
does enamel maturation/mineralization continue after the tooth erupts?
yes
-
What type of cells are specifically responsible for enamel mineralization?
ameloblasts
-
true or false. Enamel mineralization happens in waves just like enamel formation
true
-
cells that are made up of compressed enamel organ and spent ameloblasts
Reduced enamel epithelium (REE)
-
REE fuse with the __________ ____________
oral mucosa
-
What cells create a tunnel/canal for tooth eruption?
REE reduced enamel epithelium
-
When does the REE disintegrate and the ameloblasts are lost?
upon tooth eruption
-
residue from REE left on tooth
nasmith's membrane
-
mineralization of tooth structure after eruption is due to what?
deposition of minerals from the saliva
-
What are the microscopic components that make up mature enamel?
enamel rods
-
What is the shape of enamel rods?
hexagonal because of tom'es process
-
outer region surrounding each enamel rod, where stain collects in enamel. This area can be bleached
interprismatic region
-
slight ridges that exted mesial to distal in the cirvical third on certain teeth
imbrication lines
-
What teeth are imbrication lines usually seen on in enamel/
maxillary central incisors
-
these are associated with lines of retzius
imbrication lines
-
incremental lines in preparation of mature enamel, they are microscopic
lines of retzius
-
groove in between imbrication lines that are evident in some teeth
perimykata
-
wearing away of enamel cuz of tooth on tooth
attrition
-
wearing away of enamel because of chemical means, like stomach acid or lemons
erosion
-
wearing away of enamel from some sort of mechanical force like a tooth brush
abrasion
-
wearing away of enamel because of cariogenic bacteria
caries
-
wearing away of enamel because of unknow factors, maybe clenching, it breaks off at cervical area
abfraction
|
|
