研究者詳細 - 丸尾　幸憲

論文 - 丸尾　幸憲

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Top-Down Stereolithography-Based System for Additive Manufacturing of Zirconia for Dental Applications

Kumiko Yoshihara, Noriyuki Nagaoka, Fiona Spirrett, Yukinori Maruo, Yasuhiro Yoshida, Bart Van Meerbeek, Soshu Kirihara

Applied Sciences 2025年5月

Initial Bonding Performance to CAD/CAM Restorative Materials: The Impact of Stepwise Concentration Variation in 8-Methacryloxyoctyl Trimethoxy Silane and 3-Methacryloxypropyl Trimethoxy Silane on Feldspathic Ceramic, Lithium Disilicate Glass-Ceramic, and Polymer-Infiltrated Ceramic

Yukinori Maruo, Miho Kuwahara, Kumiko Yoshihara, Masao Irie, Noriyuki Nagaoka, Mai Yoshizane, Takuya Matsumoto, Kentaro Akiyama

Materials 2025年4月

Antibacterial Dental Adhesive Containing Cetylpyridinium Chloride Montmorillonite. 査読国際誌

Yohei Okazaki, Kiichi Nakamori, Chenmin Yao, Mohammed H Ahmed, Benjamin Mercelis, Noriyuki Nagaoka, Yukinori Maruo, Yasuhiro Yoshida, Yasuhiko Abe, Bart Van Meerbeek, Kumiko Yoshihara

Materials 17 ( 17 ) 2024年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

Oral bacteria cause tooth caries and periodontal disease. Much research is being conducted to prevent both major oral diseases by rendering dental materials' antimicrobial potential. However, such antimicrobial materials are regarded as 'combination' products and face high hurdles for regulatory approval. We loaded inorganic montmorillonite with the antimicrobial agent cetylpyridinium chloride, referred to below as 'CPC-Mont'. CPC-Mont particles in a 1, 3 and 5 wt% concentration were added to the considered gold-standard self-etch adhesive Clearfil SE Bond 2 ('CSE2'; Kuraray Noritake) to render its antibacterial potential (CSE2 without CPC-Mont served as control). Besides measuring (immediate) bonding effectiveness and (aged) bond durability to dentin, the antibacterial activity against S. mutans and the polymerization-conversion rate was assessed. Immediate and aged bond strength was not affected by 1 and 3 wt% CPC-Mont addition, while 5 wt% CPC-Mont significantly lowered bond strength and bond durability. The higher the concentration of the antimicrobial material added, the stronger the antimicrobial activity. Polymerization conversion was not affected by the CPC-Mont addition in any of the three concentrations. Hence, adding 3 wt% CPC-Mont to the two-step self-etch adhesive rendered additional antimicrobial potential on top of its primary bonding function.

DOI： 10.3390/ma17174368

PubMed

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Long-Term Bonding Performance of One-Bottle vs. Two-Bottle Bonding Agents to Lithium Disilicate Ceramics 査読

Masao Irie, Masahiro Okada, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto

Polymers 16 ( 16 ) 2266 - 2266 2024年8月

掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

The aim of this study was to compare the long-term bonding performance to lithium disilicate (LDS) ceramic between one-bottle and two-bottle bonding agents. Bonding performance was investigated under these LDS pretreatment conditions: with hydrofluoric acid (HF) only, without HF, with a two-bottle bonding agent (Tokuyama Universal Bond II) only. Shear bond strengths between LDS and nine resin cements (both self-adhesive and conventional adhesive types) were measured at three time periods: after one-day water storage (Base), and after 5000 and 20,000 thermocycles (TC 5k and TC 20k respectively). Difference in degradation between one- and two-bottle bonding agents containing the silane coupling agent was compared by high-performance liquid chromatography. With HF pretreatment, bond strengths were not significantly different among the three time periods for each resin cement. Without HF, ESTECEM II and Super-Bond Universal showed significantly higher values than others at TC 5k and TC 20k when treated with the recommended bonding agents, especially at TC 20k. Difference in degradation between one- and two-bottle bonding agents containing the silane coupling agent was compared by high-performance liquid chromatography (HPLC). For both cements, these values at TC 20k were also not significantly different from pretreatment with only Tokuyama Universal Bond II. For LDS, long-term bond durability could be maintained by pretreatment with Tokuyama Universal Bond II instead of the hazardous HF.

DOI： 10.3390/polym16162266

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上下無歯顎者におけるニュートラルゾーンの記録法と形態の違いに関するデジタル評価

松岸諒, 愛甲文音, 兒玉直紀, 庄賀春生, 丸尾幸憲, 萬田陽介, 田中祐貴, 杉本皓, 角谷実穂[桑原], 森慧太朗, 北川佳祐, 加藤知香[市川], 原哲也

日本補綴歯科学会誌 16 ( 特別号 ) 183 - 183 2024年7月

【高齢社会における義歯臨床で知っておきたい義歯のリライン】インプラントオーバーデンチャーとインプラント部分床義歯のリラインどんな時に必要?どのように行う?

兒玉直紀, 吉實舞, 藤澤綾香, 丸尾幸憲

日本歯科評論 84 ( 2 ) 55 - 63 2024年2月

Shear Bond Strength of Resin Luting Materials to Lithium Disilicate Ceramic: Correlation between Flexural Strength and Modulus of Elasticity 査読

Masao Irie, Masahiro Okada, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto

Polymers 15 ( 5 ) 1128 - 1128 2023年2月

掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

This study investigates the effect of the curing mode (dual-cure vs. self-cure) of resin cements (four self-adhesive and seven conventional cements) on their flexural strength and flexural modulus of elasticity, alongside their shear bond strength to lithium disilicate ceramics (LDS). The study aims to determine the relationship between the bond strength and LDS, and the flexural strength and flexural modulus of elasticity of resin cements. Twelve conventional or adhesive and self-adhesive resin cements were tested. The manufacturer’s recommended pretreating agents were used where indicated. The shear bond strengths to LDS and the flexural strength and flexural modulus of elasticity of the cement were measured immediately after setting, after one day of storage in distilled water at 37 °C, and after 20,000 thermocycles (TC 20k). The relationship between the bond strength to LDS, flexural strength, and flexural modulus of elasticity of resin cements was investigated using a multiple linear regression analysis. For all resin cements, the shear bond strength, flexural strength, and flexural modulus of elasticity were lowest immediately after setting. A clear and significant difference between dual-curing and self-curing modes was observed in all resin cements immediately after setting, except for ResiCem EX. Regardless of the difference of the core-mode condition of all resin cements, flexural strengths were correlated with the LDS surface upon shear bond strengths (R2 = 0.24, n = 69, p < 0.001) and the flexural modulus of elasticity was correlated with them (R2 = 0.14, n = 69, p < 0.001). Multiple linear regression analyses revealed that the shear bond strength was 17.877 + 0.166, the flexural strength was 0.643, and the flexural modulus was (R2 = 0.51, n = 69, p < 0.001). The flexural strength or flexural modulus of elasticity may be used to predict the bond strength of resin cements to LDS.

DOI： 10.3390/polym15051128

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Does Multifunctional Acrylate’s Addition to Methacrylate Improve Its Flexural Properties and Bond Ability to CAD/CAM PMMA Block? 査読

Yukinori Maruo, Kumiko Yoshihara, Masao Irie, Noriyuki Nagaoka, Takuya Matsumoto, Shogo Minagi

Materials 15 ( 21 ) 7564 - 7564 2022年10月

担当区分：筆頭著者,　責任著者掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

This study investigated the effects of a multifunctional acrylate copolymer—Trimethylolpropane Triacrylate (TMPTA) and Di-pentaerythritol Polyacrylate (A-DPH)—on the mechanical properties of chemically polymerized acrylic resin and its bond strength to a CAD/CAM polymethyl methacrylate (PMMA) disk. The methyl methacrylate (MMA) samples were doped with one of the following comonomers: TMPTA, A-DPH, or Trimethylolpropane Trimethacrylate (TMPTMA). The doping ratio ranged from 10 wt% to 50 wt% in 10 wt% increments. The flexural strength (FS) and modulus (FM) of PMMA with and without comonomer doping, as well as the shear bond strength (SBS) between the comonomer-doped PMMA and CAD/CAM PMMA disk, were evaluated. The highest FS (93.2 ± 4.2 MPa) was obtained when doped with 20 wt% of TMPTA. For TMPTMA, the FS decreased with the increase in the doping ratio. For SBS, TMPTA showed almost constant values (ranging from 7.0 to 8.2 MPa) regardless of the doping amount, and A-DPH peaked at 10 wt% doping (8.7 ± 2.2 MPa). TMPTMA showed two peaks at 10 wt% (7.2 ± 2.6 MPa) and 40 wt% (6.5 ± 2.3 MPa). Regarding the failure mode, TMPTMA showed mostly adhesive failure between the CAD/CAM PMMA disk and acrylic resin while TMPTA and A-DPH showed an increased rate of cohesive or mixed failures. Acrylate’s addition as a comonomer to PMMA provided improved mechanical properties and bond strength to the CAD/CAM PMMA disk.

DOI： 10.3390/ma15217564

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Shear bond strength of resin cement on moist dentin and its relation to the flexural strength of resin cement. 査読

Masao Irie, Masahiro Okada, Akio Yoshimoto, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto

Dental materials journal 41 ( 3 ) 429 - 439 2022年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

We sought to compare the bond strength of resin cement on moist dentin to that on dry dentin, and determine the relationship between the bond strength and flexural strength of resin cement. The water content of the moist and dry dentins was estimated using infrared spectroscopy. Four adhesive and three self-adhesive resin cements were used. At three times of immediately, after one-day storage, and after 20,000 thermocycles (TC 20k), the shear bond strengths were measured. For all resin cements, both the shear bond strength and the flexural strength were the lowest immediately after setting; however, after one day of water storage or TC 20k, these resin cements had the highest values. Regardless of the condition of the dentin surface upon shear bond strength, the flexural strength of each resin cement was correlated with the shear bond strength of the dentin surface.

DOI： 10.4012/dmj.2021-278

PubMed

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Flexural Property of a Composite Biomaterial in Three Applications 査読

Masao Irie, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto

Journal of Composites Science 5 ( 10 ) 2021年10月

Relationships between Flexural and Bonding Properties, Marginal Adaptation, and Polymerization Shrinkage in Flowable Composite Restorations for Dental Application. 査読国際誌

Akimasa Tsujimoto, Masao Irie, Erica Cappelletto Nogueira Teixeira, Carlos Alberto Jurado, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto, Franklin Garcia-Godoy

Polymers 13 ( 16 ) 2021年8月

Phosphate group adsorption capacity of inorganic elements affects bond strength between CAD/CAM composite block and luting agent. 査読

Eri Tokunaga, Noriyuki Nagaoka, Yukinori Maruo, Kumiko Yoshihara, Goro Nishigawa, Shogo Minagi

Dental materials journal 40 ( 2 ) 288 - 296 2021年3月

Touch-Cure Polymerization at the Composite Cement-Dentin Interface 査読国際誌

K. Yoshihara, N. Nagaoka, Y. Benino, A. Nakamura, T. Hara, Y. Maruo, Y. Yoshida, B. Van Meerbeek

Journal of Dental Research 100 ( 9 ) 002203452110010 - 002203452110010 2021年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SAGE Publications

Ceramic restorations are often adhesively luted onto the tooth prep. The so-called touch-cure concept was developed to yield optimum polymerization of composite cement at the restoration-cement-tooth interface for immediate bond stabilization. Although this touch cure is theorized to initiate polymerization at the interface when the accelerator in the primer makes contact with the cement, this process has not yet been proven. This study aimed to elucidate the mechanism of touch cure by measuring the degree of conversion (DC) of composite cement applied with or without an accelerator-containing tooth primer (TP) versus an accelerator-free primer using real-time Fourier-transform infrared spectroscopy (RT-FTIR) and attenuated total reflection (ATR)–FTIR. Interfacial bond strength was measured in shear mode, the accelerator composition confirmed by X-ray fluorescence analysis (XRF), and the interfacial interaction of TP and composite cement with dentin investigated by X-ray diffraction (XRD), focused-ion-beam scanning electron microscopy (FIB-SEM) with 3-dimensional interface reconstruction, and transmission electron microscopy (TEM). RT/ATR-FTIR revealed the significantly highest DC when the composite cement was applied with the accelerator-containing primer. XRF disclosed a vanadium compound as a novel chemical accelerator within TP, instead of a classic chemical curing initiator system, to set off touch cure as soon the cement contacts the previously applied primer. Although the TP contains the acidic functional monomer 10-MDP for adhesion to tooth tissue, touch cure using the accelerator-containing TP combined the fastest/highest DC with the highest bond strength. FIB-SEM and TEM confirmed the tight interfacial interaction at dentin with submicron hybridization along with stable 10-MDP also Ca-salt nanolayering.

DOI： 10.1177/00220345211001020

PubMed

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その他リンク： http://journals.sagepub.com/doi/full-xml/10.1177/00220345211001020

Flexural Property of Composite Biomaterials Used in the Oral Cavity 査読

Masao Irie, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto

Preprints 2021 2021年2月

Flexural Strength of Resin Core Build-Up Materials: Correlation to Root Dentin Shear Bond Strength and Pull-Out Force. 査読国際誌

Masao Irie, Yukinori Maruo, Goro Nishigawa, Kumiko Yoshihara, Takuya Matsumoto

Polymers 12 ( 12 ) 2020年12月

Development of self-adhesive pulp-capping agents containing a novel hydrophilic and highly polymerizable acrylamide monomer. 査読国際誌

Kumiko Yoshihara, Noriyuki Nagaoka, Takumi Okihara, Masao Irie, Akihiro Matsukawa, Mariano Simón Pedano, Yukinori Maruo, Yasuhiro Yoshida, Bart Van Meerbeek

Journal of materials chemistry. B 8 ( 24 ) 5320 - 5329 2020年6月

Silane-coupling effect of a silane-containing self-adhesive composite cement 査読国際誌

Kumiko Yoshihara, Noriyuki Nagaoka, Yukinori Maruo, Goro Nishigawa, Yasuhiro Yoshida, Bart Van Meerbeek

Dental Materials 36 ( 7 ) 914 - 926 2020年5月

Flexural properties, bond ability, and crystallographic phase of highly translucent multi-layered zirconia 査読

Yukinori Maruo, Kumiko Yoshihara, Masao Irie, Goro Nishigawa, Noriyuki Nagaoka, Takuya Matsumoto, Shogo Minagi

Journal of Applied Biomaterials and Functional Materials 18 2020年

Performance of Class I composite restorations when polished immediately or after one-day water storage 査読国際誌

Masao Irie, Yukinori Maruo, Goro Nishigawa

PLOS ONE 12 ( 8 ) e0183381 - e0183381 2017年8月

Bacterial adhesion not inhibited by ion-releasing bioactive glass filler 査読国際誌

Kumiko Yoshihara, Noriyuki Nagaoka, Yukinori Maruo, Hidehiko Sano, Yasuhiro Yoshida, Bart Van Meerbeek

Dental Materials 33 ( 6 ) 723 - 734 2017年6月

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