Title: 0835 - Evaluation of Dentin Bonding in Different Resin-core Build-up Methods


Mami Higashi (Presenter)
Osaka University

Atsushi Mine, Osaka University
Takuya Minamino, Osaka University
Dai Imai, Osaka University
Ryoma Ezaki, Osaka University
Hayaki Nakatani, Osaka University
Mariko Matsumoto, Hokkaido University Graduate School of Dental Medicine
Hirofumi Yatani, Osaka University


Objectives: Various methods for resin-core build-up, e.g., direct or indirect technique, and choice of materials, are available in the recent dental treatment. This study evaluated how the different techniques and/or materials affect dentin bonding in the root canal.

Methods: Crowns of human teeth (n=36) were removed at the cement-enamel junction. The root canal preparation was performed and obturated. The teeth were randomly divided into two groups according to the materials used as follows: The DC group; A combination of a light-curing adhesive and a resin composite (Clearfil bond SE ONE and Clearfil DC core automix ONE, Kuraray Noritake Dental), The PV group; A combination of a primer and an adhesive resin cement (Panavia V5 Tooth primer and Panavia V5 paste, Kuraray Noritake Dental). Furthermore, each group was divided into two groups depending on the build-up techniques, direct or indirect. Each tooth was filled with the use of either of materials and either of techniques, then stored (24h). The samples were sectioned into six slabs and a push-out test was conducted. The data were statistically analyzed (Mann-Whitney U test, α= 0.05).

Results: In the direct group, the PV group showed significantly higher bond strength compared to the DC group (P < 0.001). On the other hand, in the indirect group, there was no significant difference in bond strength between the materials (P = 0.73). The two materials did not show any significant differences in dentin bonding ability both in the direct and the indirect resin-core build-up techniques (PV: P = 0.36, DC: P = 1.00).

Conclusions: The adhesive resin cement with a combination of the primer showed stronger bonding ability to root canal dentin compared to the resin composite with a combination of the light-curing adhesive. Any difference was not observed in the dentin bonding ability of the two resin-core build-up techniques.

Disclosure Statement:
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONE