McqMate
| Q. |
What does enamel cover? |
| A. | Crown of the tooth |
| B. | Dentin on all sides |
| C. | Cementum |
| D. | Cementum and partly dentin |
| Answer» A. Crown of the tooth | |
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Explanation: The basic unit of enamel is called an enamel rod which is a tightly packed mass of hydroxyapatite crystals in an organized pattern. In cross section, it is best compared to a keyhole, with the top, or head, oriented toward the crown of the tooth, and the bottom, or tail, oriented toward the root of the tooth. |
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