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.