著者

Nobutaka AKAZAWA Hiroyasu KOIZUMI Hiroshi NOGAWA Akihisa KODAIRA Michael F. BURROW Hideo MATSUMURA

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

pp.2018-152, (Released:2019-05-09)

参考文献数

28

被引用文献数

8

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The purpose of the current study was to evaluate the effect of etching with potassium hydrogen difluoride (KHF2) and ammonium hydrogen difluoride (NH4HF2) on the bond strength of a self-polymerizing methyl methacrylate resin (MMA-TBB) bonded to zirconia. Zirconia disks were prepared using the following surface treatment: no treatment, alumina blasting, and etching with KHF2 or NH4HF2. The specimens were bonded with the MMA-TBB. The shear bond (Ø=5 mm) strength was measured. The surface free energies of the specimens were determined by measuring contact angles. The KHF2 and NH4HF2 groups exhibited higher shear bond strength and surface free energy than did the alumina blasting and no treatment groups. Compared with alumina blasting, etching with KHF2 and NH4HF2 exhibited superior bonding ability of mechanical retention to zirconia.

著者

Kunio IKEMURA Takeshi ENDO

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.29, no.5, pp.481-501, 2010 (Released:2010-10-14)

参考文献数

55

被引用文献数

55 121

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This paper reviews our recent studies on radical photopolymerization initiators, which are used in the design of light-curing dental adhesives and resin composites, by collating information of related studies from original scientific papers, reviews, and patent literature. The photopolymerization reactivities of acylphosphine oxide (APO) and bisacylphosphine oxide (BAPO) derivatives, and D,L-camphorquinone (CQ)/tertiary amine were investigated, and no significant differences in degree of conversion (DC) were found between BAPO and CQ/amine system (p>0.05). In addition, a novel 7,7-dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carbonyldiphenyl phosphine oxide (DOHC-DPPO=CQ-APO) was synthesized and its ultraviolet and visible (UV-VIS) spectral behavior was investigated. CQ-APO possessed two maximum absorption wavelengths (λmax) at 350–500 nm [372 nm (from APO group) and 475 nm (from CQ moiety)], and CQ-APO-containing resins exhibited good photopolymerization reactivity, excellent color tone, relaxed operation time, and high mechanical strength. It was also found that a newly synthesized, water-soluble photoinitiator (APO-Na) improved adhesion to ground dentin.

著者

Her-Hsiung HUANG Mau-Chin LIN Chien-Chan LIN Sheng-Chieh LIN Chii-Chih HSU Fang-Lung CHEN Shyh-Yuan LEE Chun-Cheng HUNG

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.32, no.1, pp.195, 2013-01-31 (Released:2013-02-01)

著者

Kanitsak BOONANANTANASARN Kajohnkiart JANEBODIN Prapan SUPPAKPATANA Tawepong ARAYAPISIT Jit-aree RODSUTTHI Panjit CHUNHABUNDIT Surintorn BOONANUNTANASARN Wanida SRIPAIROJTHIKOON

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.33, no.1, pp.149, 2014-01-30 (Released:2014-02-01)

著者

Sonia SANTANDER Clara ALCAINE Jaber LYAHYAI Maria Angeles PÉREZ Clementina RODELLAR Manuel DOBLARÉ Ignacio OCHOA

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.33, no.1, pp.148, 2014-01-30 (Released:2014-02-01)

著者

Mojtaba MAHMOUDI Alireza SAIDI Saied Abdolreza GANDJALIKHAN NASSAB Maryam Alsadat HASHEMIPOUR

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.33, no.1, pp.147, 2014-01-30 (Released:2014-02-01)

著者

Dimitrios DIONYSOPOULOS Eugenia KOLINIOTOU-KOUMPIA Maria HELVATZOGLOU-ANTONIADES Nikolaos KOTSANOS

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.34, no.3, pp.410, 2015-05-28 (Released:2015-06-03)

著者

Akifumi TAKAHASHI Tomohiro TAKAGAKI Takahiro WADA Motohiro UO Toru NIKAIDO Junji TAGAMI

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.37, no.5, pp.734-739, 2018-09-27 (Released:2018-09-30)

参考文献数

23

被引用文献数

20

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The effects of contamination and cleaning methods on bonding of self-adhesive resin cement to zirconia ceramics were examined. Airborne particle-abraded zirconia (Zpex Smile) specimens were divided into the following four groups: control (con), contaminated with saliva and cleaned with tap water (HS), cleaned with Ivoclean (IC), and cleaned with Multi Etchant (ME). The pretreated specimens were bonded using three self-adhesive resin cements, and tensile bond strengths were measured using a universal testing machine at a crosshead speed of 2 mm/min. Con and IC groups showed significantly higher bond strength than those of HS and ME groups. Separately, the surface chemical composition of the groups was determined using X-ray photoelectron spectroscopy (XPS). XPS revealed that the N/Zr ratio increased in the HS group but decreased in the IC and ME groups. Cleaning agents can improve the adverse effect of saliva contamination on zirconia, but this effect varies depending on the product.

著者

Tomoyo OKAZAKI Hiroyasu KOIZUMI Hiroshi NOGAWA Akihisa KODAIRA Tomotaro NIHEI Hideo MATSUMURA

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

pp.2017-183, (Released:2018-01-26)

参考文献数

33

被引用文献数

1

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This study aimed to investigate how different compositions of experimental silane-based primers in a methyl methacrylate solution containing 3-(trimethoxysilyl)propyl methacrylate (3-TMSPMA) or 3-(4-methacryloyloxyphenyl)propyl trimethoxysilane (3-MPPTS) might act as silicon dioxide bonding agents. With or without post-silanization heat treatment, primer-treated quartz discs were bonded using the MMA-TBB resin and their bond strengths were evaluated. The disks were primed with one of the following materials: 1 mol% 3-TMSPMA, 2 mol% 3-TMSPMA, 1 mol% 3-MPPTS, and 2 mol% 3-MPPTS. Shear bond strength was determined both before and after thermocycling. Statistical analyses were performed with non-parametric procedure (Kruskal-Wallis, Mann-Whitney U, and Steel-Dwass tests). Both primers were effective with heat treatment to enhance bonding between quartz and the MMA-TBB, and the bonding durability of the 1 and 2 mol% 3-MPPTS (16.8 and 24.9 MPa) with heat groups was significantly higher than in the 1 and 2 mol% 3-TMSPMA (5.4 and 9.8 MPa) with heat groups.

著者

Seiichiro FUJISAWA Yoshinori KADOMA Yasuo KOMODA

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.10, no.1, pp.18-26,97, 1991-06-25 (Released:2009-02-12)

参考文献数

10

被引用文献数

2 2

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生体膜と歯科用接着性モノマーの相互作用のメカニズムを分子レベルで明らかにするため,4-META及びその関連化合物(4-methacryloyloxyethoxycarbonyl-phthalic Acid 4-MET,フタール酸,無水フタール酸)とジパルミトイルホスファチジルコリン(DPPC)リポソームとの相互作用をNMR及びDSCを用いて研究した。pH 7.4で,4-META,及び無水フタール酸により誘起されたDPPCリポソームのNMRケミカルシフトと相転移温度の変化は,フタール酸のそれより大きかった。DPPC/4-METAリポソーム系のNMRスペクトルはDPPC/4-METリポソーム系と類似した。これは4-METAが加水分解し4-METになった為と推察された。さらに,4-META及びその関連化合物のヒト赤血球に及ぼす影響を検討した。4-META,及び無水フタール酸は4-MET及びフタール酸に比べて高い溶血性を示した。このことは,イオン化する化合物は生体膜に透入できないことを示した。

著者

Shunichi SUDA Akimasa TSUJIMOTO Wayne W. BARKMEIER Kie NOJIRI Yuko NAGURA Toshiki TAKAMIZAWA Mark A. LATTA Masashi MIYAZAKI

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

pp.2017-059, (Released:2017-11-23)

参考文献数

51

被引用文献数

20

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The effect of phosphoric acid pre-etching on enamel bond fatigue durability of universal adhesives and two-step self-etch adhesives was investigated. Four universal adhesives and three two-step self-etch adhesives were used. The initial shear bond strengths and shear fatigue strengths to enamel with and without phosphoric acid pre-etching using the adhesives were determined. SEM observations were also conducted. Phosphoric acid pre-etching of enamel was found to increase the bond fatigue durability of universal adhesives, but its effect on two-step self-etch adhesives was material-dependent. In addition, some universal adhesives with phosphoric acid preetching showed similar bond fatigue durability to the two-step self-etch adhesives, although the bond fatigue durability of universal adhesives in self-etch mode was lower than that of the two-step self-etch adhesives. Phosphoric acid pre-etching enhances enamel bond fatigue durability of universal adhesives, but the effect of phosphoric acid pre-etching on the bond fatigue durability of two-step self-etch adhesives was material-dependent.

著者

TETÈ Stefano ZIZZARI Vincenzo Luca BORELLI Bruna DE COLLI Marianna ZARA Susi SORRENTINO Roberto SCARANO Antonio GHERLONE Enrico CATALDI Amelia ZARONE Fernando

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.33, no.1, pp.7-15, 2014

被引用文献数

31

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Human gingival fibroblasts (HGFs) were cultured onto CAD/CAM zirconia (Group A), CAD/CAM zirconia after polishing (Group B), CAD/CAM lithium disilicate after polishing (Group C), and feldspathic ceramic (Group D) to evaluate their proliferation and adhesion potential. After 3 h, HGF adhesion was similar in all groups. Later, HGFs closely adhered to surfaces, particularly onto groups B, C and D, acquiring an elongated shape. Proliferation assay showed no differences in cell viability among the groups after 24 h, while significant increase was shown after 72 h in Groups B and C. After 24 h, similar Collagen I levels were found in all groups, while after 72 h Groups B and C revealed a deep reduction in respect to the 24 h level. <i>In vitro</i>, HGF behavior may reflect variability in soft tissue response to different surface materials for prosthetic restorations, and support that polished zirconia is able to achieve a better integration <i>in vivo</i> in respect to the other materials.

著者

Duck-Su KIM Sang Hyuk PARK Gi-Woon CHOI Kyoung-Kyu CHOI Sun-Young KIM

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.30, no.5, pp.717-722, 2011 (Released:2011-10-08)

参考文献数

26

被引用文献数

12 14

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The effect of the ethylenediaminetetraacetic acid (EDTA) treatment on the hybrid layer durability of total-etch dentin adhesives was investigated. A flat dentin surface was exposed and treated with 37% phosphoric acid or 0.1M EDTA. Dentin adhesive was applied and a 4 mm thick composite resin was built-up. Twenty 0.9×0.9 mm2 resin-dentin beams were fabricated in each experimental group. Artificial aging with 10% NaClO was performed in half of the experimental groups for 1 hour. A micro-tensile bond strength (μTBS) test was performed and the bonded interface was analyzed with transmission electron microscopy (TEM). The 37% phosphoric acid-treated group showed a lower μTBS after artificial aging, whereas the 0.1M EDTA-treated group did not. TEM analysis revealed collagen fibrils dissolved in the 37% phosphoric acid-treated group but not in the 0.1M EDTA-treated group. Undissolved minerals were observed in the 0.1M EDTA-treated group. In conclusion, a dentin treatment with 0.1M EDTA is effective in improving the hybrid layer durability.

著者

Kenji ARITA Aimi YAMAMOTO Yukari SHINONAGA Keiko HARADA Yoko ABE Keizo NAKAGAWA Shigeru SUGIYAMA

出版者

The Japanese Society for Dental Materials and Devices

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.30, no.5, pp.672-683, 2011 (Released:2011-10-08)

参考文献数

39

被引用文献数

40 63

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The aims of this study were to improve the mechanical and chemical properties of conventional restorative glass ionomer cement (GIC) by adding hydroxyapatite (HAp) preparations with different characteristics, and to investigate the underlying reaction mechanisms. Fuji IX GP® was used as the control GIC. The experimental GICs consisted of four HAp-particles with different characteristics added at 8 mass% to Fuji IX-powder. All cements were prepared by mixing with Fuji IX-liquid (P/L=3.6). Four HAp-particles were analyzed, and then the mechanical strengths and the fluoride-ion- release-recharge-behaviors of five GIC groups were evaluated. The results of this study demonstrate that the addition of HAp particles with highly reactive properties such as high specific surface area can enhance the flexural strength and fluoride ion release properties of conventional restorative GIC. Our results further indicate that HAp functions as an adsorbent and an ion exchangeable agent, resulting in improved mechanical and chemical properties of GIC.