Term
| What kind of material is enamel? |
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Definition
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Term
| What is the hardest calcified tissue in the body? |
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Definition
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Term
| Does enamel have and nerves or blood vessels? |
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Definition
| no it is avascular and does not contain any nerves |
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Term
| Can you make more enamel throughout your life? |
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Definition
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Term
| What percentage of enamel is inorganic? |
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Definition
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Term
| What area of the tooth has the thickest enamel? |
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Definition
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Term
| What do ameloblasts do during the maturation of enamel over time? |
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Definition
| they pump more calcium hydroxyapatite crystals into the enamel matrix |
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Term
| What happens to the organic material in enamel over time? |
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Definition
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Term
| How long does mineralization of enamel continue? |
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Definition
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Term
| What happens to enamel minerals throughout life? |
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Definition
| demineralization and remineralization |
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Term
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Definition
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Term
| Where is enamel matrix secreted from? |
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Definition
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Term
| What is the enamel matrix initially composed of? |
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Definition
| proteins, carbohydrates, small amount of calcium hydroxyapatite crystals |
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Term
| Where does the enamel matrix initially form? |
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Definition
| in the incisal/occlusal third of the crown |
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Term
| How are layers or enamel matrix deposited? |
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Definition
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Term
| What are the two parts of enamel? |
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Definition
1.Enamel rod
2.Interprismatic region |
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Term
| How many ameloblasts make up one enamel rod? |
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Definition
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Term
| What is the shape of enamel rods? |
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Definition
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Term
| How many ameloblasts form the head? The tail? |
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Definition
| 1 form the head, 3 form the tail |
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Term
| How do crystals in the rod grow? |
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Definition
| until they are tightly packed |
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Term
| What part of the enamel are the rods? |
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Definition
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Term
| Where does each enamel rod extend from? |
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Definition
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Term
| Are all the rods the same length? |
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Definition
| no they all vary in length, ones at the cusp are the longest, ones in the CEJ are the shortest |
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Term
| What is the interprismic region of enamel matrix? |
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Definition
| the areas surrounding each rod |
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Term
| What is each rod encased in? |
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Definition
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Term
| What helps cement the rods together? |
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Definition
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Term
| What is the interprismic region's purpose? What is it made of? |
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Definition
| gives teeth flexibility, higher concentration of organic material and water |
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Term
| How often is there a slight change in development of enamel? |
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Definition
| about every 4 days, to make it more stable |
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Term
| What are lines of Retzius? |
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Definition
| evidence of slight change in direction that occurs every 4 days |
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Term
| What are neonatal lines? Can we see them with the naked eye? |
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Definition
| an accentuated line of retzius marks the stress ameloblasts undergo during the birth process |
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Term
| What are enamel spindles? |
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Definition
| dentinal tubules that crossed basement membrane and got trapped in enamel matrix |
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Term
| What happens to the enamel around enamel spindles? |
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Definition
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Term
| What are enamel tufts and enamel lamellae? |
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Definition
| both anomaly of crystalization, they are less mineralized |
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Term
| Where are enamel tufts found? |
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Definition
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Term
| Where are enamel lamellae found? |
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Definition
| extend from DEJ to the outer surface |
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