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morphology and physiology of enamel - Coggle Diagram
- morphology and physiology of enamel
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interrod space: space between the enamel rods, contains crystals that are arranged in different direction to the crystals in the rod
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gnarled enamel
near cusp region, intertwining bundles
cross striations, shows the development rate of 4um per day of enamel
DEJ: border between D and E stable bond between the two, wavy, folded, many layers,
enamel tufts: failed ameloblasts, defect in the enamel
enamel spindle, processes of odontoblasts, increase sensitivity
enamel lamellae: cracks in enamel, development, or trauma
enamel surface: thin surface is aprismatic MEANS NO RODS, only apatite crystals, crystals are thick and wide, very narrow gaps, very resilient and tight
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intercrystalline spaces: Cu, Mg, Mn, Zn, Al
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ION EXCHANGE: heteroionic (OH replaced by F) and isionic (Ca replaced by another Ca), happens across the saliva,
around the apatite crystal, there is electrical double layer of Helmholz, this is double layer of anions and cations, different electrical charges, makes surface unstable, this is how ions diffuses into the crystal
stages of ionic exchange
1) reversible, ions diffuse into outer layer
2) reversible, diffuses into inner layer near the crystal surface
3) difficult to reverse, ions reach and join the surface of crystal
4) irreversible, ions replace defects in crystal lattice