Term
| What happens to enamel when it is sectioned? |
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Definition
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Term
| Calcium Hydroxyapatite chemical formula |
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Definition
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Term
| Why does fluoride subsitution increase the stability of enamel? |
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Definition
1. Fluoride fits better into the structure
2. Increases electronegativity which pulls Ca2+ and PO3- ions in closer
3. More compact therefore more stable structure |
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Term
| At what angle to hydroxyapatite molecules alternate along a column? |
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Definition
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Term
| Better hardness: Enamel or Dentine |
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Definition
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Term
| Better stifness: Enamel or Dentine |
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Definition
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Term
| Better compressive strength: Enamel or Dentine |
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Definition
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Term
| Better tensile strength: Enamel or Dentine |
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Definition
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Term
| Mohs hardness for Enamel and Dentine |
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Definition
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Term
| Where in the tooth is the enamel densest? |
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Definition
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Term
| Where in the tooth is there the highest concentration of magnesium in enamel? |
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Definition
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Term
| Describe the relationship between magnesium and hydroxyapatite density in enamel |
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Definition
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Term
| Describe fluoride distribution in enamel |
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Definition
| On surface of enamel where toothpaste most easily reaches |
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Term
| Describe the relationship between fluoride distribution and magnesium/carbonate distribution |
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Definition
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Term
| Apatite crystals in dentine |
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Definition
| are smaller! but with similar chemistry |
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Term
| Magnesium/Carbonate content of dentine compared to enamel? |
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Definition
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Term
| What are the hydroxyapatite crystals in dentine embedded in? |
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Definition
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Term
| Dentine collagen features |
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Definition
| Highly cross-linked and very stable |
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Term
| What is the advantage of dentine being cellular (as compared to enamel) |
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Definition
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Term
| Protein distribution in enamel |
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Definition
| Most near amelodentinal junction and reside between the prisms |
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Term
| What can proteins in enamel protect against? |
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Definition
| The dissolution of enamel |
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Term
| Concept of supersaturation: ________ materials will only dissolve is surrounding solution is below ___________ |
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Definition
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Term
| Ionic materials will only __________ if surrounding solution is __________ above |
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Definition
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Term
| Saturation is achieved when solubility _________ reaches a certain value |
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Definition
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Term
| Solubility product equation for binary salt XY |
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Definition
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Term
| Solubility product for Ca10(PO4)6(OH)2 |
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Definition
| Ksp=[Ca]^10 x [PO4]^6 x [OH]^2 |
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Term
| For a given salt ksp must be __________ for precipitation to occur |
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Definition
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Term
| What effect to carbonate/magnesium have on the solubility product? |
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Definition
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Term
| What effect does fluoride have on the solubility product? |
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Definition
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