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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

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

Publication:
November 1990
Volume 21 , Issue 11

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Relationship among visible light source, composite resin polymerization shrinkage, and hygroscopic expansion.

Donly, Kevin J.; Dowell, Alan; Anixiadas, Chrysoula; Croll, Theodore P.

PMID: 2084790

Composite resins contract during polymerization, and studies have shown that light-cured composite resins shrink toward the polymerizing light source. The purpose of this study was to investigate differences in the adaptation of composite resin to the axial wall in Class V restorations following light curing from the lingual or facial aspects. Polymerization contraction in relation to hygroscopic expansion of the restoration was also investigated. Results showed no statistically significant differences (P < .05) in the adaptation of composite resin to the axial wall, regardless of the polymerization technique, the composite resin, or the effects of hygroscopic expansion.

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