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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

March/April 2012
Volume 14 , Issue 2



Pages: 147 - 154
PMID: 21935515
DOI: 10.3290/j.jad.a22093
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Effectiveness of the Bond Established Between Ceramic Inlays and Dentin Using Different Luting Protocols

Rathke, Andreas / Hokenmaier, Gerd / Muche, Rainer / Haller, Bernd

Purpose: To evaluate the ceramic-to-dentin bond following luting with light- and dual-curing resin composites using different adhesive techniques. Materials and Methods: Dentin surfaces from 160 human molars were ground flat and randomly divided into eight groups (n = 20). Vita Mark II ceramic disks measuring 2 and 4 mm in thickness were bonded to the dentin with one of the following luting systems: Syntac/Tetric Ceram (ST), Syntac/Variolink II (SV), OptiBond Solo Plus/ Prodigy (OP), OptiBond Solo Plus/Nexus 2 (ON). Two different irradiation times (60 s, 120 s) were used per luting system, each without (-PC) and with (+PC) precuring the respective adhesive layer. After storage in water for 24 h at 37C, the bonded specimens were sectioned perpendicularly to the adhesive interface into 1-mm-thick sticks. Three sticks per specimen were loaded to failure under tension in the Zwicki 1120. Failure analysis was performed using a scanning electron microscope (SEM). Results: Four-way ANOVA showed that the ceramic thickness, the type of luting system used, and the adhesive precuring had a significant effect on the microtensile bond strength. The longer irradiation times did not significantly increase the bond strength. The highest values were recorded with SV/+PC (27.9 4.3 MPa) and the lowest with ST/-PC (10.2 3.5 MPa). Under the SEM, failed specimens that had not been precured showed significantly more exposed dentin than those which had been precured (chi-square test). Conclusion: The precuring step of light-curing bonding systems and the use of dual-curing luting composites were shown to optimize the dentin bond under thick ceramic layers. Keywords: ceramic-to-dentin bond, luting system, light curing, dual curing, precuring, bonding effectiveness

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