Adhesive Dentistry
Online ISSN : 2185-9566
Print ISSN : 0913-1655
ISSN-L : 0913-1655
Volume 18, Issue 1
Displaying 1-6 of 6 articles from this issue
  • Akira Niisato, Hideto Takahashi, Shigeo Yokozuka
    2000 Volume 18 Issue 1 Pages 1-13
    Published: April 15, 2000
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    For appropriate functioning of hybrid ceramics in the oral cavity, not only the mechanical strength of the restoration material itself but also its fitness and bonding to the abutment tooth, i.e., unification with the tooth, is indispensable. One of the factors associated with bonding is surface treatment of the bonding surface of the restoration material.
    To clarify the effects of surface treatment on the bond strength of hybrid ceramics, we performed the combination of sandblast treatment, silane treatment, and heat treatment of the bonding surface before bonding with resin cement. After storage of the samples at 37°C for 24 hours followed by 3, 000 thermal cycles (4-5°C), bond strength was measured.
    Bond strength improved after sandblast treatment performed in combination with silane treatment and heat treatment of the bonding surface. Even after thermal cycles, bond strength only slightly decreased. Therefore, the combination of sandblast treatment, silane treatment, and heat treatment of the bonding surface of hybrid ceramics is useful for improving bond strength and bonding durability .
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  • Takako Ide, Hidetachi Kato, Hideo Matsumura, Mitsuru Atsuta
    2000 Volume 18 Issue 1 Pages 14-21
    Published: April 15, 2000
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of the current study was to evaluate bonding performance of ceramic bonding systems consisting of a two- or three-liquid silane agent and a resin-based luting material. Sintered porcelain disks (VMK 68) were air-abraded with alumina, and bonded with one of the four bonding systems: Clapearl Bonding Agent and Clapearl DC; Clearfil Porcelain Bond and Panavia 21; Porcelain Liner M and Super-Bond C&B; and Tokuso Ceramics Primer and Bistite Resin Cement. Specimens were either thermocycled (100, 000 cycles) or uncycled, and shear bond strengths were determined. With the exception of the Clearfil Porcelain Bond -Panavia 21 system, post-thermocycling bond strengths of three systems were comparable. Although the Tokuso Ceramics Primer -Bistite Resin Cement system recorded the greatest pre-thermocycling bond strength, reduction after thermocycling was remarkable.
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  • The Combination of Self-Etching Primers and Bonding Agents
    Tohru Hayakawa, Kazuyo Kikutake, Ichirou Yokota, Kimiya Nemoto
    2000 Volume 18 Issue 1 Pages 22-29
    Published: April 15, 2000
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The influence of the combination of the self-etching primer and bonding agent of two commercially available self-etching systems was investigated on the adhesion of resin composite to enamel or dentin.
    The bond strengths were influenced by the combination of the self-etching primer and bonding agent, and the combination recommended by the manufactures did not always give the highest bond strengths. The highest bond strength to enamel were obtained by the combination of primer in the MAC-BOND II system and Σbond in the Clearfil Linerbond IIΣ system, and that to dentin was obtained by the combination of Σprimer in the Clearfil Linerbond IIΣ system and Σbond.
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  • Shinichi Arita, Tadao Fukushima, Koji Miyazaki, Takami Itoh, Mitsunari ...
    2000 Volume 18 Issue 1 Pages 30-42
    Published: April 15, 2000
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The bond strengths of orthodontic mesh brackets with a 4-META/MMA-TBB resin to bovine and human premolar enamel, which had been etched with 37% phosphoric acid for 10 seconds, with various contaminants after immersion in water for 15min. and for 24h., and after thermal cycles were measured to investigate the effect of contaminants on bonding. The bond strengths to bovine enamel with mixed saliva, plasma and blood cells were 13.8, 18.3 and 13.5MPa, respectively, and were lower than that (control, 31.5MPa) to dry enamel. The bond strengths after immersion in water for 15 min. to human enamel with water, mixed saliva and blood were 5.0, 6.2 and 7.0MPa, respectively, and were lower than that of control (9.5MPa). The bond strengths after immersion in water for 24h. to human enamel with water and mixed saliva were 6.6, and 6.3MPa, respectively, and were lower than that of control (8.5MPa). Those bond strengths did not reduce by thermal cycles. The reduction in bond strength significantly correlated with the viscosity of con- taminants. There are areas without resin tags on resin surface of specimens with con- taminants. SEM micrographs revealed that specimens exhibiting high bond strength had resin-bracket interface failure after bond test.
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  • Masashi Miyazaki, Jun Higaki, Hirohiko Inage, Seiichi Fujii, Hideo Ono ...
    2000 Volume 18 Issue 1 Pages 43-50
    Published: April 15, 2000
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The one of the most important mechanisms of dentin bonding is believed to be based on creation of resin-dentin interdiffusion (hybrid) layer. Since the width of this layer is quite thin, it has been very difficult to analyze and provide chemical composition of this layer. The purpose of this study was to investigate the method to analyze the hybrid layer by means of a high resolution Laser Raman microscopic system (System-2000, Renishaw). From the results of this study, the reliability of this system was determined as enough as to analyze a thin hybrid layer. The relative amounts of the hydroxyapatite of dentin (960cm-1, P-O totally stretching mode of phosphate), adhesive resin (640cm-1, aromatic ring) and organic substances in adhesive resin and dentin (1, 450cm-1, scissoring vibration of the CH) were able to calculate by using Raman spectra detected from successive layer of resin-dentin interdiffusion zone. And also, it was found that the rate of residual double bonds was determined by comparing the vibration band of the methacrylate C=C bond at 1, 640cm-1 with the C=O bond at 1, 717cm-1. It was concluded that using the Laser Raman microscopic observation enabled the precise analysis of the hybrid layer.
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  • Toshiaki Kashiwada
    2000 Volume 18 Issue 1 Pages 51-62
    Published: April 15, 2000
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    Traditional metal core reconstruction may cause shedding of prosthetic appliance and/ or root fracture, even if it keeps the theory. The fracture toughness of ceramics crowns which were cemented to abutment with/without adhesive at the margin was tested, and the results suggested that the adhesion of margin was important for prevention of the shedding of prosthetic appliance. It was found that AD Gel method improved adhesion. The method was conditioning dentin surfaces using 40% phosphoric acid and 10% sodium hypochlorite gel (AD Gel) prior to applying adhesive cements. Furthermore, we investigated the modulus of tooth structures, core materials and adhesive cements, and the relationship between post hole and post. These results and clinical observation showed that composite resin core system with readymade metal posts and dentin conditioning using AD Gel method gave us sound and durable core reconstruction.
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