Adhesive Dentistry
Online ISSN : 2185-9566
Print ISSN : 0913-1655
ISSN-L : 0913-1655
Volume 24, Issue 3
Displaying 1-13 of 13 articles from this issue
  • Rena MARUOKA, Toru NIKAIDO, Junji TAGAMI
    2006 Volume 24 Issue 3 Pages 105-110
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to evaluate coronal leakage inhibition using a resin coating technique after endodontic treatment. Seventy-two human molars were cut at the cementoenamel junction and standard endodontic obturation was performed. The specimens were randomly divided into twelve groups according to the following factors: post-space preparation, resin coating and temporization. Post-spaces, 5mm in length, were prepared from the cementoenamel junction. For the resin coating, the dentine surface was coated with a combination of a self-etching primer bonding system, Clearfil Mega Bond and a low viscosity micro-filled resin, Protect Liner F (MB/PLF), or an experimental one-step self-etching primer bonding system, Hybrid Bond (HB). HB was applied2times for coating. A water-setting temporary filling material, Cavit-G, was used as the control. Following this, the specimens were stored in37°C distilled water for24h. They were then placed in1% methylene blue solution for48h. After that, the specimens were facio-lingually sectioned into two halves along the root canal using a diamond saw. The length of dye penetration along the cavity wall was measured from the cementoenamel junction for each group. Three-way ANOVA revealed that the dye penetration score was influenced by resin coating (F=818.608; p<0.0001), post-space preparation (F=26.620; p<0.0001) and temporization (F=44.154;p<0.0001). The resin coating with 2 applications of HB significantly reduced the dye penetration score. The resin coating with MB/PLF eliminated dye penetration completely. The resin coating technique can effectively inhibit coronal leakage in endodontically treated teeth.
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  • Xiaohua ZHAO, Masahiro YOSHIYAMA
    2006 Volume 24 Issue 3 Pages 111-119
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    This study was carried out to investigate the effects of active vs. inactive application of one-step self-etching adhesives on bond strengths to carious dentin. Two one-step self-etching adhesive systems, One-Up Bond F Plus (OB-P, the adhesive was applied actively) and One-Up Bond F (OB, the adhesive was applied inactively), were employed. Human extracted molars with mild occlusal caries were stained with a caries detecting solution and ground perpendicularly to the long axis of the tooth to expose the flat dentin surfaces. The dentin surfaces were classified into sound dentin (SD), caries-affected dentin (CAD) and caries-infected dentin (CID) groups by the degree of staining. Each adhesive system was applied to the surfaces, and a composite resin was built up and polymerized. After immersion in water for24hours, a micro-tensile bond strength test was performed. The treated dentin surfaces and the resin-dentin interfaces with OB-P or OB were observed by SEM. The bond strengths of OB-P for each dentin type were significantly higher than those of OB; however, the bond strengths of both adhesive systems to CAD and CID were significantly lower than those to SD. SEM observation showed that OBP improved the capacity of decalcification and resin-infiltration compared to OB. Thus, the carious dentin adhesive property of OB-P with active application was better than that of OB.
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  • Hiroaki YANAGIDA, Naomi TANOUE, Mitsuru ATSUTA, Mitsuo NAKAMURA, Hideo ...
    2006 Volume 24 Issue 3 Pages 120-124
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of the current study was to examine the effectiveness of organic sulfur compounds on bonding durability between silver-palladium-copper-gold alloy and acrylic adhesive. The Metal Link (ML) and V-Primer (VP) primers were assessed; the ML primer contains10-methacryloyloxydecy1-6, 8-dithiooctanoate (MDDT) for noble metal and6-methacryloxyhexylphosphonoacetate (MHPA) for base metal in acetone, while the VP includes 6-(4-vinylbenzyl-n-propyl) amino-1, 3, 5-triazine-2, 4-dithione (VTD) in acetone. After air-abrasion with alumina, cast disk specimens made of silver-palladium-cupper-gold alloy were primed and bonded with different acrylic adhesives (Multi-Bond or Super-Bond C&B). Unprimed specimens were also prepared as controls for each adhesive. Regarding the Super-Bond adhesive, both primers had significant effects on the post-thermocycling (100, 000cycles) shear bond strengths. Concerning the Multi-Bond adhesive, the post-thermocycling strength for the ML primer was not statistically (p>0.05) different from that for the unprimed group.
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  • Naoko KAMISHIMA, Takatsumi IKEDA, Yasuko NAKAOKI, Hidehiko SANO
    2006 Volume 24 Issue 3 Pages 125-129
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of the study was (1) to determine the relationship between thickness and translucency of resin composites and (2) to evaluate the minimal thickness at which the resin composites can avoid unfavorable color changes due to the dark background color. The CIELAB parameters for disks (0.5, 1.0, 2.0, 3.0, and4.0mm in thickness) ofA2-and OA2-shade of Clearfil Majesty (Kuraray Medical: MJ A2, MJ OA2), Estelite Σ(Tokuyama Dental: ES A2, ES OA2), and Solare (GC: SL A2, SL OA2) were evaluated on black and white backings to calculate a translucency parameter (TP). In the case of this TP, OA2-shades were found to be less translucent than A2-shades, while translucency increased exponentially due to a reduction in thickness, regardless of the shade. It was found that the minimal thicknesses at which the resin composites can avoid an unfavorable color change caused by the dark background color were 3.18, 3.00, and 2.82mm for MJ A2, ES A2, and SL A2, respectively. Correspondingly, the minimal thickness of MJ OA2, ES OA2 and SL OA2were calculated as2.77, 2.57 and 2.39mm, in order.
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  • Shigeru UNO, Makoto MORIGAMI, Jumpei SUGIZAKI, Toshimoto YAMADA
    2006 Volume 24 Issue 3 Pages 130-135
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    This study was carried out to evaluate the curing characteristics of a flowable resin composite, Estelite Flow Quick (EFQ, Tokuyama Dental).
    EFQ paste of shade A2, A4or Inc was filled into a split cylindrical mold and irradiated for 5 or 20 seconds with a halogen lamp. After the longitudinal split surface was polished, micro-hardness was measured on the surface by the nano-indentation method at the depth of50, 100 or500μm and1, 2or3mm from the top surface. As a control, Medium Flow A3irradiated for20seconds was used.
    For Inc, 5-seconds irradiation gave a constant hardness regardless of the depth (Tukey HSD, p>0.05). Fiveseconds irradiation resulted in lower hardness than20-seconds irradiation for any shade of EFQ (P<0.05), but generated comparable hardness with the control (p>0.05) except for A4at the depth of2and3mm.
    The results indicated that the curing property of EFQ was enhanced by the radical amplified photo-polymerization initiator contained. However, the shorter irradiation may cause insufficient polymerization at the deeper part for the darker shade.
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  • Yuji TSUBOTA, Nao FUKAGAWA, Shigeru KITAMURA, Takatoshi ONE, Yasushi N ...
    2006 Volume 24 Issue 3 Pages 136-144
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    Dislodgement of crowns even with foundation restorations is one of the most common troubles in daily practice.In this study, post holes were prepared in human lower incisors and glass-fiber posts were cemented to them with several adhesive materials. After that, the posts were pulled out and the failure strength and mode were determined.
    As a result, there were significant differences among adhesive materials concerning the failure mode due to the differences of adhesive strengths between two interfaces: between adhesive materials and fiber posts and between adhesive materials and dentin, and also due to the properties of the adhesive materials themselves. On the other hand, there were no significant differences concerning the failure strength.
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  • Masao HANABUSA, Naotake AKIMOTO, Takatsugu YAMAMOTO, Yasuko MOMOI
    2006 Volume 24 Issue 3 Pages 145-157
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to evaluate the one-year clinical performance of adhesion to enamel margin with four one-step adhesive systems. A total of173restorations of Class I were placed with one of the four one-step adhesive systems, AQ Bond Plus (Sun Medical), Adper Prompt L-Pop Self-Etch Adhesive (3M ESPE), Absolute (Dentsply Sankin), G-BOND (GC) and a two-step self-etching system, Imperva Fluoro Bond (Shofu). Restorations were assessed in4categories: marginal discoloration, marginal integrity, secondary caries and pulpal response according to modified USPHS criteria. Assessments were done immediately after placement and again at1year.Intraoral color photographs were also taken at the same time. Impressions of all restorations were taken for the observation of marginal adaptation by scanning electron microscope. Neither pulpal response nor secondary caries was found at the1-year recall period. In51restorations, slight marginal disintegration was seen but clinically did not require re-filling. These clinical findings suggest that adhesion to enamel with one-step adhesive systems is acceptable for use in adhesive restorations.
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  • Mariko IIDA, Naotake AKIMOTO, Mayuko HARA, Yasuko MOMOI
    2006 Volume 24 Issue 3 Pages 158-166
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to observe the resin-dentin interface of four one-bottle self-adhesives by FESEM.Dentin discs were prepared from freshly extracted human third molars and the surfaces were ground with #600SiC paper under running water. These surfaces were treated with four commercially available one-bottle selfadhesives (Absolute; Dentsply Sankin, G Bond; GC, i Bond; Heraeus Kulzer, and Clearfil tri-S Bond; Kuraray Medical), respectively following the manufacturer's directions, and then treated surfaces were restored with a flowable composite resin (Revolution Formula2-Kerr; Sybron Dental) and light cured. Specimens were longitudinally sectioned through the resin-dentin interface and stored in water or not in water for1day and1month. After each period, the specimen was argon ion (Ar-ion) beam etched for30or60seconds with1kV acceleration voltage (EIS-200ER; Elionix), and the resin-dentin interface was observed by FE-SEM (ERA-8900FE; Elionix). The bond layer of all materials showed a rough surface after Ar-ion etching. The morphological structure of the bond layer observed depended on the adhesive systems. However, all materials showed that there were no morphological differences between1day and 1 month storage. It was suggested that the morphological structure of the four commercially available one-bottle self-adhesives was stable after1month water storage.
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  • Naoko KAMISHIMA, Takatsumi IKEDA, Yasuko NAKAOKI, Hidehiko SANO
    2006 Volume 24 Issue 3 Pages 167-171
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of the study was to evaluate the color of opaque-shade resin composites. The products and shades of resin composites used in the present study were A2-and OA2-shade of Clearfil Majesty (Kuraray Medical: MJ A2, MJ OA2), Estelite Σ(Tokuyama Dental: ES A2, ES OA2), and Solare (GC: SL A2, SL OA2). The CIELAB parameters (L*, a*, b*) of disks 4mm in thickness were measured on a backing of white tile to evaluate differences between the products and shades. In addition, color differences (ΔE*) were calculated to compare them with a threshold of human perception in color. As a result, it was found that the L* of OA2-shade were always larger than that of A2-shade. Regarding a*, MJ OA2 showed a smaller value than MJ A2, though the OA2-and A2-shade of the other two products indicated no difference. As for b*, OA2 revealed a larger value compared with A2, except for ES OA2. In clinical situations, it seems essential to understand differences of color in opaque-shade resin composites.
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  • Part II: Influence of thermal cycling on flexural properties
    Toshiki TAKAMIZAWA, Atsushi IROKAWA, Toru MAEDA, Kanako YAMAGUCHI, Gen ...
    2006 Volume 24 Issue 3 Pages 172-178
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    Provisional restorations are used to restore during interim period between tooth preparation and fitting a definitive restoration, and to ensure that the patient can continue to function as well as for esthetic restorations. Recently, newly developed paste-type provisional resins, which include inorganic fillers, have been available. Though the newly developed provisional resins might have certain advantages, little is known about their long term stability in terms of physical and mechanical properties. The purpose of this study was to evaluate the effect of thermal cycling on the flexural properties of paste-type resins and compare the results with those of PMMA resins. After thermal cycling, the flexural strength and elastic modulus of the provisional resins increased. This tendency was more pronounced for paste-type resins than PMMA-type resins. SEM observations of the fracture surface showed irregular fracture patterns containing cleavage steps, characteristic of a gritty fracture surfaces. For PMMA resins, rough and irregular fracture patterns containing numerous exposed and placed PMMA beads were observed.
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  • Tetsuya ASAI, Ryunosuke KAZAMA, Takashi OKIJI, Masayoshi FUKUSHIMA
    2006 Volume 24 Issue 3 Pages 179-184
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to compare the adaptation of laminate veneers milled using the dental CAD/CAM CEREC2and CEREC3systems. An artificial resin tooth of the upper-left incisor was prepared for laminate veneer restoration. The prepared tooth was subjected to optical impression procedures using either CEREC2or CEREC 3. The adaptation of the laminate veneer restoration was evaluated by a cement-replica method using an injection type of silicon impression material. Each silicon replica specimen was sectioned in the buccolingual direction through the center of the labial surface with a surgical knife. Film thicknesses were measured at three points (incisal, center and gingival) on the cut surface using a stereomicroscope. The mean film thicknesses of the respective CEREC2and CEREC3groups were 185±49μm and26±16μm for the incisal, 245±37±μm and95±35 μm for the center and212±87μm and30±20μm for the gingival. Significant differences between the two groups were recognized by one way ANOVA and Bonferroni correction of multiple comparison. It was concluded that the CEREC3system showed a better fit of laminate veneer restorations than the CEREC2system.
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  • Yasushi SHIMADA, Akhtar UZZAMAN, Yasutaka SASAFUCHI, Masayuki OHTSUKI, ...
    2006 Volume 24 Issue 3 Pages 185-189
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to evaluate the pulpal response of a resin inlay bonded with a resin-modified glass ionomer cement known as Ionotite F. Cervical class V cavities were prepared in monkey teeth. A resin-modified glass ionomer cement was mixed and applied, and then composite resin inlays were bonded to the cavities. The teeth were then extracted after3, 30, and90days, fixed with 10% buffered formalin solution, and prepared in accordance with routine histological techniques. Five-micrometer sections were stained with hematoxylin and eosin, or with a Brown & Brenn gram stain for bacterial observation. No serious inflammatory reaction of the pulp, such as necrosis or abscess formation, was observed in any of the samples of the experimental periods. No bacterial penetration along the cavity walls was detected when the resin inlay was bonded with Ionotite F. The resin-modified glass ionomer cement showed an acceptable biological compatibility to the monkey pulp.
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  • Masahiro AIDA, Haruhiko GOTOU, Norihiro NISHIYAMA, Yuji OMURA, Masanob ...
    2006 Volume 24 Issue 3 Pages 190-195
    Published: December 15, 2006
    Released on J-STAGE: June 07, 2011
    JOURNAL FREE ACCESS
    In this study, the effects of storage temperature of ceramic primers on the bond strength of resin cements to the GN-1composite resin for the CAD/CAM system or GRADIA for the crown & bridge resin were examined.
    We used Porcelain Liner M and Lamina Bond Porcelain Primer as a ceramic primer. After receiving these primers, we stored them for20months at freezer or room temperature. The GN-1composite resin or GRADIA was treated with these primers. A polyvinylchloride ring mold was then placed on the primed surfaces. After this, the inside of the ring mold was filled with resin cement. The shear bond strength of the resin cement was measured, and29Si NMR observations of these primers were conducted.
    We did not observe any difference in the bond strength of the resin to the primed GN-1composite resin and GRADIA before and after storage of the Porcelain Liner M. However, when the Lamina Bond Porcelain Primer, which had been stored for20months, was applied, the bond strength decreased. The reduction in the bond strength obtained from storage at room temperature was greater than that obtained from the freezer storage. This was due to condensation of the silane coupling agent during the storage period.
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