Adhesive Dentistry
Online ISSN : 2185-9566
Print ISSN : 0913-1655
ISSN-L : 0913-1655
Volume 23, Issue 2
Displaying 1-8 of 8 articles from this issue
  • Yasushi CHIBA, Keishi TSUBOTA, Youhei ASAKA, Toshiki TAKAMIZAWA, Hiroy ...
    2005 Volume 23 Issue 2 Pages 105-109
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to investigate the influence of surface moisture on dentin bond strength of resin cements that employ self-etching primers. Four resin cements, Bistite II (Tokuyama Dental), Link Max (GC), Multi Bond (Tokuyama Dental), and Panavia Fluoro Cement (Kuraray Medical) were used. Bovine mandibular incisors were used as a substitute for human teeth. After rinsing with three-way syringe, labial surfaces of incisors were divided into three groups; 1) dry with three-way syringe for10sec, 2) dry with three-way syringe for 2 sec, and 3) blot dry. A stainless mold was bonded with resin cements. After storage in 37°C distilled water for 24 h, ten specimens per group were tested in a shear mode at a crosshead speed of 1.0 mm/min. The wet condition of the dentin surface tended to decrease the bond strength compared with those of the dry condition except for Multi Bond. There was no significant difference among three conditions for Multi Bond. The etching effect of self-etching primers might be weakened by the moisture condition of dentin surface. Care should be taken on the moisture conditions of dentin surface when using these resin cements utilizing self-etching primers.
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  • Noriko HISAMATSU, Naomi TANOUE, Mitsuru ATSUTA, Yoshikazu KAWAMOTO, Hi ...
    2005 Volume 23 Issue 2 Pages 110-117
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The objective of the current study was to evaluate the bonding durability between layers of two indirect composite materials (Cesead II and Estenia) when combined with silane primers and unfilled resin bonding agents. Disk specimens were prepared with the dentin portion of the composite materials and abraded with a silicon-carbide rotary cutting instrument. The specimens were conditioned with varying combinations of silane primer (Add-on Primer, Porcelain Liner M, and unprimed) and bonding agent (Modeling Liquid, Stain Diluent, and no-bondinga gent). After placing the enamel portion of the same brand of composite material on each surface of the dentin material, the specimens were light-exposed. Shear bond strengths were determined after 24 hours immer-sion in water and after subsequent thermocycling for20, 000, 50, 000, and 100, 000cycles. Analysis of variance-revealed that the most influential factor was thermocycling. Reduction in bond strength after thermocycling was remarkable for all groups. After100, 000 thermocycling, the combination of Add-on Primer silane material and no -bonding agent showed the greatest strength for the Cesead II material, whereas the Add-on Primer material and Modeling Liquid agent indicated the greatest bond strength for the Estenia material.
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  • Makoto MORIGAMI, Shigeru UNO, Jumpei SUGIZAKI, Masaya KONDO, Toshimoto ...
    2005 Volume 23 Issue 2 Pages 118-121
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The Ceram·X including nanofillers has been developed recently by Dentsply-DeTrey Co. The Ceram·X has the two series of the “Ceram·X mono” for bulk restoration and the “Ceram·X duo” for layering restoration. Seven shades (M1-M7) are lined up for the Ceram·X mono, and three enamel shades (E1-E3) and five dentin shades (D1-D4, DB) are lined up for the Ceram·X duo. The aim of this study was to observe the polished surface of the set Ceram·X under the FE-SEM with the Ar-ion etching technique. Furthermore, a clinical performance of the Ceram·X restoration in combination with the Absolute was examined. The filler composition of the Ceram·X was the glass fillers of5μm in maximum diameter, nanofillers of10nm in diameter, and the nanoparti-cles of 2-3 nm in diameter. The Ceram·X was classified into the category of traditional small filler+nanofiller. According to this clinical application, the Ceram·X showed a good clinical performance with no post-operative accident. It was suggested that the Ceram·X was very useful for anterior and posterior restorations.
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  • Efncacy of phosphoric acid-sodium hypochlorite treatment
    Rena SHIMURA, Toru NIKAIDO, Tomohiro TAKAGAKI, Junji TAGAMI
    2005 Volume 23 Issue 2 Pages 122-128
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purposes of this study were to evaluate dentin bonding performance and to examine secondary caries inhibition using a resin cement combined with two different types of dentin pretreatments. Human dentin surfaces were pretreated with a self-etching primer (ED Primer II) or a combined treatment with phosphoric acid and sodium hypochlorite (K-etchant/AD Gel) followed by ED Primer II, then bonded with a dual-cure resin cement (Panavia F2.0). Micro-tensile bond strength (MTBS) test and SEM examination of artificial secondary caries at the interface were carried out. The results of the MTBS test demonstrated no significant difference between ED Primer II and K-etchant/AD Gel (p>0.05). The SEM observations of the secondary caries formation indicated morphological differences between two groups. The resin cement-dentin interface of the ED Primer II group demonstrated secondary caries inhibition, while no secondary caries inhibition was shown in the K-etchant/AD Gel group. Since the bond strengths obtained in this study were clinically not enough, dentin bond strength of the resin cement should be improved to inhibit secondary caries formation.
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  • Yoshikazu KAWAMOTO, Hiroyuki KAWASE, Tasuku HASHIMOTO, Yumi ISHIKAWA, ...
    2005 Volume 23 Issue 2 Pages 129-136
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of the current study was to investigate the effect of silane treatment on bond strength to the Esteniaindirect resin composite.
    Although the silanization to indirect resin composite enhanced significantly higher bond strength, the bondstrength was affected by the type of silane treatment. The most effective silane system was Two-liquid systemcontaining the phosphoric ester monomer for the functional monomer, and showed the twice as high bond strengthcompared with the lowest value system. Application of a silane treatment improves the bond strength to indirectresin composite for repair, which was dependent upon the silane treatment systems. The results suggested that theappropriate silane treatment should be selected when repair bonding to indirect resin composite.
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  • Keishi TSUBOTA, Satoshi UEKUSA, Kazuaki NAKAMURA, Akira YAMAMOTO, Tosh ...
    2005 Volume 23 Issue 2 Pages 137-142
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    he purpose of this study was to know the influence of adhesive application duration on dentin bond strengths of single-step self-etch adhesive systems; Adper Prompt L-Pop (AP) and AQ Bond Plus (AQ). Shear bond strengths to bovine dentin were measured and failure modes after testing were observed with microscope. The treated dentin surfaces and the resin-dentin interfaces were also observed with SEM. The dentin bond strengths ranged 9.0-12.2 MPa for AP and 11.5-12.3 MPa for AQ. When the adhesive application duration was shortened, the dentin bond strength tended to decrease and a significant difference in bond strength was observed for AP. Demineralization of the dentin surface was more pronounced with longer adhesive application duration of the treated dentin surfaces. There were no apparent differences in SEM images with adhesive application duration. This study suggested adhesive application duration might be one of the technique sensitive factors of single-step self-etch systems.
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  • Toshiki TAKAMIZAWA, Kanako YAMAGUCHI, Akira YAMAMOTO, Kazuaki NAKAMURA ...
    2005 Volume 23 Issue 2 Pages 143-151
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    Light-cured resins have reached remarkable progress in bonding ability to tooth structure, leading to long-term durability of the restoration. From the survey of the reasons for replacement of the restoration, surface roughness and marginal fracture might relate to the clinical problems of the resin restoration. The purpose this study was to evaluate filler contents and thermal expansion of various light-cured resins. Inorganic filler contents were measured by a thermogravimeter and thermal expansion of the light-cured resins were evaluated by a thermomechanical analyzer. Filler contents of universal resins ranged from 42.5 to 68.4 wt% and flowable resins ranged from 42.5 to 68.4 wt%. Thermal expansion of universal resins ranged from 20.8 to 55.1×10-6°C and flowable resins ranged from 45.3 to 73.2×10-6/°C. The coefficient of correlation between filler contents and thermalexpansion were-0.690 for universal resins and-0.353for flowable resins. Various size and shape of filler wereobserved under the FE-SEM.
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  • Shigeru UNO, Eiji YOSHIDA, Susumu HIRANO, Toshimoto YAMADA
    2005 Volume 23 Issue 2 Pages 152-160
    Published: August 15, 2005
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    This study was aimed to evaluate the bonding efficacy of a one-step adhesive system Adper Prompt L-Pop. Inmicrotensile bond testing to human dentin, 23 out of 30 specimens were broken down at the bonding interfaceduring trimming of the specimens. The result was 2.7±5.89 MPa or 11.6±6.87 MPa when n=30 or n=7, respectively. FE-SEM observation of the fractured surfaces showed that most failures occurred at the interface between adhesive resin and resin composite, and void-like structures were appeared on the adhesive resin surfaces. FE-SEM figures of the bonding interfaces revealed the tight adhesions to enamel, sound dentin and caries-affecteddentin, while voids formation was found at the interface between adhesives and composites. At the interface withdentin, there was a hybrid layer approximately 2-3μm thick. In TEM observation, the oxygen inhibition layerswere created in the superficial adhesive resin layer. Due to a low pH of approximately 0.9 and a strong demineraliz-ing effect, this system might create a hybrid layer composed of mainly collagen and impregnated monomers.However, it was suggested that its highly hydrophilic and acidic properties likely caused poor bonding with the resin composite.
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