|  | 11. | Enamel's primary mineral is hydroxyapatite, which is a crystalline calcium phosphate. 
 
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|  | 12. | These minerals, especially hydroxyapatite, will become soluble when exposed to acidic environments. 
 
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|  | 13. | The odontoblast process causes the secretion of hydroxyapatite crystals and mineralization of the matrix. 
 
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|  | 14. | He is most widely known for his development of the bioceramic hydroxyapatite orbital implant. 
 
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|  | 15. | Fluoride helps prevent decay of a tooth by binding to the hydroxyapatite crystals in enamel. 
 
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|  | 16. | The undermineralised, immature enamel containing long, thin prisms of hydroxyapatite, now matures. 
 
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|  | 17. | The most important mineral phases have been identified as hydroxyapatite, silica, and aragonite. 
 
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|  | 18. | This produces the stronger and more acid-resistant fluorapatite, rather than the natural hydroxyapatite. 
 
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|  | 19. | Hydroxyapatite, also known as hydroxylapatite, is the major component of tooth enamel and bone mineral. 
 
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|  | 20. | In contrast, low to medium porosity microporous layers displayed more stable configurations and induced hydroxyapatite growth. 
 
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