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BDS2 BAMS Oral Biology > 2. Enamel > Flashcards

2. Enamel Flashcards

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1
Q

Basic unit of enamel

A

Enamel rod (enamel prism)

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2
Q

Course of enamel rod

A

From DEJ/ADJ to the surface of the crown

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3
Q

Definition of cross striations

A

A response to daily rod growth

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4
Q

Definition of striae of Retzius

A

An effect on transmitted light crossing enamel and are formed at weekly intervals

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5
Q

How is crystalline orientation determined

A

During enamel formation

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6
Q

What establishes crystallite organisation

A

Tomes process

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7
Q

How is crystallisation induced

A

Secretion of proteins by ameloblasts

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8
Q

Chemical formula of hydroxyapatite

A

Ca10(PO4)6(OH)2

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9
Q

Course of enamel rod

A

Sinusoidal course

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10
Q

Definition of Hunter-Schreger bands

A

Periodic orientation cause banding patterns that are absent in outer enamel

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11
Q

Definition of neonatal line

A

Growth line, part of striae of Retzius

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12
Q

Definition of EDTA

A

Calcium ion trapper

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13
Q

Function of EDTA

A

Removes calcium, demineralises tooth

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14
Q

Definition of enamel tufts

A

Hypomineralised regions at the ADJ due to residual matrix protein at prism boundaries

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15
Q

Definition of enamel lamella

A

Incomplete maturation of groups of prisms - the fault lines extend through enamel thickness

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16
Q

Definition of enamel spindles

A

Odontoblast processes extending into enamel

BDS2 BAMS Oral Biology (14 decks)

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