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Chapter 12 Enamel

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Question
Answer
What is the most highly calcified dental tissue?   Enamel  
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What is enamel composed of?   Calcium Hydroxyapatite  
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Calcium Hydroxyapatite   Ca10(PO4)6(OH)2  
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Does enamel have blood vessels or nerves?   No  
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Attrition   Loss through tooth to tooth contact from mastication with age or parafunctional habits  
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Erosion   Loss through chemical means-such as acid.  
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Abrasion   Loss through friction from tooth brushing or toothpaste.  
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Caries   Cavities. Loss from chemical means-acid; from cariogenic bacteria by way of biofilm.  
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Abfraction   Possible loss through tensile and compressive forces during tooth flexure with parafunctional habits. The pressure can cause cracks or splits in the enamel.  
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What are some clinical considerations for enamel?   Attrition, Erosion, Abrasion, Caries, and Abfraction  
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What is amelogenesis   The process of enamel matrix formation  
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When does amelogenesis occur?   During the apposition stage of tooth development.  
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What do ameloblasts secret?   Enamel matrix from the Tome's procces  
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When does the enamel organ become an ameloblast?   After dentin is deposited in the IEE of the enamel organ.  
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What is the function of amelobasts?   They pump calcium hydroxyapatite into the partial mineralized enamel matrix while trying to take out the organic materials.  
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REE fuses with the oral epithelium to form?   a canal to allow the enamel cusp to erupt through the oral epithelium into the oral cavity.  
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Packed masses of hydroxyapatite crystals from what?   enamel rods or prisms  
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Function of enamel prisms   Help with strength, they run from the DEJ and the outer edge of the enamel surface.  
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Fluoridation can be supplied what two ways?   Systemically through water or supplements or topically through fluoride trays.  
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What are enamel sealants?   protective covering of cavities and fissures.  
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What is a clinical consideration of whitening trays or strips?   They do not produce any structural changes in the dentin tissues but some people are sensitive to the bleach.  
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Created by: Strobelight95
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