著者

INOUE Go NIKAIDO Toru SADR Alireza TAGAMI Junji

出版者

日本歯科理工学会

雑誌

Dental materials journal (ISSN:02874547)

巻号頁・発行日

vol.31, no.2, pp.232-238, 2012-03-01

参考文献数

27

被引用文献数

1 9

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This study investigated the influence of the composition of self-etching primer adhesive systems on the morphology of acid-base resistant zones (ABRZs). One-step self-etching primer systems (Clearfil Tri-S Bond, G-Bond, and One-Up Bond F Plus) and two-step self-etching primer systems (Clearfil SE Bond, Clearfil Protect Bond, UniFil Bond, and Mac Bond II) were used in this study. Each adhesive was applied on prepared dentin disk surfaces, and a resin composite was placed between two dentin disks. All resin-bonded specimens were subjected to acid-base challenge. Observation under a scanning electron microscope (SEM) revealed the creation of an ABRZ adjacent to the hybrid layer for all the self-etch primer adhesive systems, even when non-fluoride releasing adhesives were used. The presence of fluoride in two-step self-etching adhesive significantly increased the thickness of ABRZ created. Results suggested that an ABRZ was created with the use of self-etching primer adhesive systems, but its morphology differed between one-and two-step self-etching primer adhesive systems and was influenced by fluoride release activity.

著者

SHIMURA Rena NIKAIDO Toru YAMAUTI Monica IKEDA Masaomi TAGAMI Junji

出版者

一般社団法人日本歯科理工学会

雑誌

Dental materials journal (ISSN:02874547)

巻号頁・発行日

vol.24, no.1, pp.70-75, 2005-03

被引用文献数

8 33

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This study evaluated the influence of curing method and storage condition on the microhardness of dual-cure resin cements : Panavia F 2.0 (PF) and Nexus 2 (NX). The specimens were either light-cured (LC) or chemically cured in darkness (CC). After 24 hours of storage in dry chamber (Dry) or distilled water (DW), the specimens were sectioned and polished. The microhardness of resin cement matrix was measured using a nanoindentation tester (ENT-1100). The data (n=6) were statistically analyzed with t-test, two-way ANOVA (p<0.05), and Tukey HSD test (α=.05). It was found that the factors of curing method and storage condition had significant effect on microhardness. For both PF and NX, LC presented higher microhardness than CC, while DW showed higher microhardness than Dry. In conclusion, dual-cure resin cements could achieve high degree of cure when light-cured. In addition, the microhardness of the resin cements evaluated did not decrease when kept in water.

著者

KANNO Tama OGATA Miwako FOXTON Richard Mark NAKAJIMA Masatoshi TAGAMI Junji MIURA Hiroyuki

出版者

一般社団法人日本歯科理工学会

雑誌

Dental materials journal (ISSN:02874547)

巻号頁・発行日

vol.23, no.4, pp.550-556, 2004-12

被引用文献数

13 14

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The purpose of this study was to measure the bond strength of dual-cure resin cement at different regions of root canal dentin using three kinds of curing method. Thirty-six extracted bovine teeth were used. Each root was sectioned vertically into halves. Their pulpal dentin walls were polished flat and then applied with two dual-cure resin cements (Bistite II, Panavia F), and divided into three curing strategy groups : multi-direction light, one-direction light and no-light. The bonded specimens were sectioned perpendicularly to the long axis of the root into approximately 0.7 mm thick slabs within two-third of the root from the coronal end, and prepared for microtensile bond strength (μTBS) test. Knoop hardness of the cements was also measured. Within each curing strategy for both dual-cure resin cements, there were no significant differences between the μTBS values at the coronal third and mid third regions. The effect of curing method on bond strength and KHN was found to be dependent on the material.