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Questions and Answers
What is the percentage of mineralized or inorganic material in mature enamel by weight?
What is the percentage of mineralized or inorganic material in mature enamel by weight?
- 96% (correct)
- 98%
- 90%
- 95%
What is enamel composed of, besides calcium hydroxyapatite?
What is enamel composed of, besides calcium hydroxyapatite?
- Mainly bone and cementum
- Mainly dentin and pulp
- 1% organic material and 3% water (correct)
- Mainly pulp and cementum
Why can enamel be lost forever?
Why can enamel be lost forever?
- Because it is the softest calcified tissue in the body
- Because it is nonvital and cannot be replaced (correct)
- Because it is the hardest calcified tissue in the body
- Because it is vascular and has many nerves
How does enamel appear on radiographs compared to dentin and pulp?
How does enamel appear on radiographs compared to dentin and pulp?
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What is the chemical formula of calcium hydroxyapatite?
What is the chemical formula of calcium hydroxyapatite?
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What is the primary structural unit of the enamel?
What is the primary structural unit of the enamel?
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What direction are the enamel rods oriented in relation to the DEJ and the outer enamel surface?
What direction are the enamel rods oriented in relation to the DEJ and the outer enamel surface?
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What is the reason for the varying degrees of curvature in the enamel rods?
What is the reason for the varying degrees of curvature in the enamel rods?
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What is the characteristic of the enamel rods in terms of length?
What is the characteristic of the enamel rods in terms of length?
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What is the term for the region surrounding the enamel rods?
What is the term for the region surrounding the enamel rods?
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