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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

Publication:
November 1994
Volume 25 , Issue 11

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The effect of acid-etched dentin on marginal seal

Sidhu

Pages: 797-800
PMID: 7568686

Treatment of dentin with acids results in a surface change that is potentially useful for mechanical retention of resins in tooth structure. This study examined the effect of etching of dentin on the seal of cavities restored with composite resin. Eighty cavities, each measuring 2.0 mm in diameter and 1.5 mm in depth, were prpared in dentin of extrac ted human teeth and randomly assigned to two equal groups. The experimental group was etched with 37% phosphoric acid for 15 seconds before restoration. The control specimens were similarly restored but without any etch ing of dentin. After the specimens were thermocycled, the seal of each cavity was assessed by measurement of the gap between the restorative material and the tooth structure. The experimental group registered significantly better adpatation to the cavities than did the control group.

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