Effects of Water Pressure during Polymerization on Mechanical Properties of Autopolymerized Resins
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概要
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Purpose: This study evaluated the effects of water pressure on the mechanical properties and tensile bond strength of autopolymerized resins during polymerization at room temperature using a dental pressure pot with chair-side ease of handling.Methods: Four different autopolymerized resins (Unifast II, Unifast III, Provinice, and Miky Plus) were used. Specimens were fabricated by the brush-on technique. In the pressure group, specimens were polymerized in a dental pressure pot under 0.2 MPa water pressure at room temperature. In the non-pressure group, specimens were polymerized on bench. The 2 groups were compared for dimensional accuracy, 3-point bending, and tensile bond strength. Data were statistically analyzed by two-way analysis of variance (ANOVA) with Tukey’s multiple comparison test at a significance level of α=0.05.Results: Two-way ANOVA indicated that both resin and pressure had significant effects on the polymerization shrinkage rate (PSR). Interaction between resin and pressure was also significant. The PSR was lower in the pressure group than in the non-pressure group. The PSRs of Unifast II and Miky Plus were greatly improved by pressure polymerization. Significant differences in flexural strength were observed between the 2 groups. The flexural strength significantly increased under pressure. No significant differences in tensile bond strength were observed between the 2 groups.Conclusion: The dimensional accuracy and flexural strength of autopolymerized resins were significantly improved by the application of water pressure during polymerization. No significant changes in tensile bond strength were observed following pressure application at room temperature.
- 日本補綴歯科学会の論文
- 2007-10-01
著者
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TAKAHASHI Hidekazu
Advanced Biomaterials, Graduate School, Tokyo Medical and Dental University
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Takahashi Hidekazu
東京医科歯科大学 医歯学総合研究科包括診療歯科学講座総合診療歯科学
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SUZUKI TETSUYA
Department of Orthopedic Surgery, Akita University School of Medicine
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ODA Nobusuke
Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Sciences Division Of Oral Health Sciences Graduate S
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OHKUBO Takuya
Department of Astronomy, University of Tokyo
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Oda Nobusuke
Department Of Removable Prosthodontics School Of Dentistry Iwate Medical University
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Ohkubo Takuya
Department Of Astronomy University Of Tokyo
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Suzuki Tetsuya
Iwate Medical Univ. Iwate Jpn
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FURUYA Junichi
Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
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Furuya Junichi
Department Of Removable Prosthodontics School Of Dentistry Iwate Medical University
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TOYODA Yasuo
Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
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OIZUMI Makoto
Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
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Oizumi Makoto
Iwate Medical Univ. Morioka Jpn
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Oizumi Makoto
Department Of Geriatric Dentistry Tokyo Medical And Dental University Faculty Of Dentistry
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Takahashi Hidekazu
Advanced Biomaterials Graduate School Of Medical And Dentistry Tokyo Medical And Dental Univ.
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Sciences Tokyo Medical And Dental University
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Toyoda Yasuo
Department Of Removable Prosthodontics School Of Dentistry Iwate Medical University
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Oda Nobusuke
Iwate Medical Univ. Iwate Jpn
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Takahashi Hidekazu
Oral Biomaterials Engineering Department Of Oral Materials Sciences And Technology Course Of Oral He
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Suzuki Tetsuya
Department Of Orthopedic Surgery Akita Rosai Hospital
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Science Division Of Oral Health Science Graduate Sch
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Sciences Division Of Oral Health Sciences Graduate S
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Suzuki Tetsuya
Department Of Computer Science Faculty Of Engineering Yamanashi University
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