Effect of composite post placement on bonding to root canal dentin using 1-step self-etch dual-cure adhesive with chemical activation mode

Masako Okuma, Masatoshi Nakajima, Keiichi Hosaka, Shima Itoh, Masaomi Ikeda, Richard M. Foxton, Junji Tagami

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This study evaluated the effect of composite post placement and/or light-irradiation of dual-cure resin composite on adhesion to root canal dentin using the chemical activation mode of a 1-step self-etch dual-cure adhesive. Post spaces were prepared in extracted premolars. Root canal spaces were applied with Unifil Core EM Self-Etching Bond, which was chemically-polymerized, and then filled with Unifil Core EM with or without the placement of composite post. Half the specimens of each group were light-cured for 10 seconds and the other half were chemically-cured in darkness for 30 minutes. After 24 h storage, microtensile bond strengths (mu TBS) at the coronal and apical regions were measured. When light-curing, placement of the composite post significantly reduced the mu TBS to root canal dentin. On the other hand, when chemical-curing, there was no significant difference in mu TBS between with and without placement of the composite post.
Original languageEnglish
Pages (from-to)642 - 648
Number of pages7
JournalDental Materials Journal
Volume29
Issue number6
DOIs
Publication statusPublished - 2010

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