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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:

January/February 2010
Volume 12 , Issue 1



Pages: 55 - 62
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Benefits of a Two-step Cementation Procedure for Prefabricated Fiber Posts

Jongsma, Leontine A. / Bolhuis, Peter B. / Pallav, Prem / Feilzer, Albert J. / Kleverlaan, Cornelis J.

Purpose: To determine whether two-step cementation of prefabricated fiber posts leads to higher bond strengths. Materials and Methods: Forty-eight human canine teeth were divided into six groups and fiber posts were cemented with DC Core, RelyX Unicem and Panavia F2.0, according to a one-step or two-step procedure. Per root, four cross-sections were prepared. The differences in push-out strength between procedure, cement and location within the root were determined. Results: For all cements, the push-out strengths for the two-step procedure were significantly higher than for the onestep procedure (p < 0.001). Differences between the cements for both the one-step and two-step procedure were not statistically significant (p = 0.05). Conclusion: The reduction of the C-factor by means of a two-step cementation, a procedure equivalent to the layering technique of composite restorations, resulted in significantly higher bond strengths. The increase of 60% in bond strength may be beneficial to the retention of post and core restorations.

Keywords: prefabricated fiber post, cementation procedure, C-factor, push-out strength, polymerization shrinkage

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