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Dental Anatomy: Characteristics of Tooth Enamel

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Dental Anatomy: Characteristics of Tooth Enamel

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Questions and Answers

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?

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?

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?

More opaque Signup and view all the answers

What is the chemical formula of calcium hydroxyapatite?

Ca10(PO4)6(OH)2 Signup and view all the answers

What is the primary structural unit of the enamel?

Enamel prisms Signup and view all the answers

What direction are the enamel rods oriented in relation to the DEJ and the outer enamel surface?

Perpendicular Signup and view all the answers

What is the reason for the varying degrees of curvature in the enamel rods?

Movements of the ameloblasts during enamel production Signup and view all the answers

What is the characteristic of the enamel rods in terms of length?

Each enamel rod is varies in length Signup and view all the answers

What is the term for the region surrounding the enamel rods?

Interprismatic region Signup and view all the answers