Overview

enamel

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accretion lines

Overview page. Subjects: Dentistry.

Lines visible in microscopic sections of enamel marking successive layers of added material.

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ameloblast

Overview page. Subjects: Dentistry.

Columnar epithelial cells responsible for secreting the outer enamel layer of the tooth. The apical surface has a pyramidal process (Tomes process) that is embedded within the enamel...

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Ardipithecus ramidus

Overview page. Subjects: Zoology and Animal Sciences — Earth Sciences and Geography.

The earliest known member of the human lineage, discovered in 1993 by Tim White, Gen Suwa, and Berhane Asfaw at Aramis, Ethiopia, and dated to 4.4 million years bp. The canine teeth are...

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bonding to enamel

Overview page. Subjects: Dentistry.

Is achieved by the removal of hydroxyapatite and enamel prisms using an acid, usually 37% phosphoric acid, by the acid-etch technique creating a micromechanical bond. Because dentine has a...

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calcium fluorapatite

Overview page. Subjects: Dentistry.

A mineral formed during the remineralization of enamel when fluoride ions are present. The formation takes place according to the following equation:Ca10 (PO4)6 (OH)2null...

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cemento-enamel junction

Overview page. Subjects: Dentistry.

(CEJ)

The line at which the enamel of the tooth crown meets the cementum of the tooth root. The area above this line constitutes the anatomical crown of the tooth. In about 60% of...

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crevice

Overview page. Subjects: Dentistry.

A narrow opening or gap. The gingival crevice (gingival sulcus) is a narrow gap between the free gingiva and the enamel of the tooth.

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dark zone

Overview page. Subjects: Dentistry.

An area of demineralized enamel which is part of a carious lesion visible on ground sections of a tooth viewed under transmitted light. It lies between the outer intact layer and the deeper...

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demineralization

Overview page. Subjects: Dentistry — Chemistry.

A loss or removal of mineral salts from the tissues of the body. It occurs in dentine and enamel as part of the carious process. Enamel starts to demineralize when the plaque or saliva pH...

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dentine

Overview page. Subjects: Dentistry.

(den-teen)

a hard tissue that forms the bulk of a tooth. The dentine of the crown is covered by enamel and that of the root by cementum.

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