巻号一覧
21 巻 (2002)
- 4 号 p. 285-
- 3 号 p. 225-
- 2 号 p. 73-
- 1 号 p. 1-
21 巻, 3 号
選択された号の論文の5件中1～5を表示しています
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Kazuhiko SUESE, Takayoshi KAWAZOE2002 年 21 巻 3 号 p. 225-237
発行日: 2002年
公開日: 2009/02/12
ジャーナル フリーComparative studies on two-body sliding wear resistance were performed between a hybrid composite resin and conventional light-curing composite veneering materials. This study investigated the wear resistance of hybrid composite resins compared with three composite resin veneering materials for 12% Au-Ag-Pd alloy, the wear resistance of four restorative materials opposed to hybrid composite resin, and the influence of surface characteristics on hybrid composite resins. Hybrid composite resin without heat-curing, which was compared with other composite resin materials exhibited inferior wear resistance, but hybrid composite resin mechanically polished after heat-curing exhibited the most superior wear resistance.抄録全体を表示PDF形式でダウンロード (3969K) -
Effects on the Marginal Leakage of Composite Resin RestorationYoshimi SHIGETANI, Yasuaki TATE, Akira OKAMOTO, Masaaki IWAKU, Neamat ...2002 年 21 巻 3 号 p. 238-249
発行日: 2002年
公開日: 2009/02/12
ジャーナル フリーThe purpose of this study was to evaluate marginal leakage of composite resin restoration from cavities prepared by Er: YAG laser. The observation of the dentin surface after the application of laser irradiation was performed by LSM, the cutting surface showed a rough surface similar to scales, and exposed dentinal tubules were observed without striations or a smeared layer formation that were observed when using a rotary cutting device. Leakage tests revealed no significant differences in the marginal seal for both enamel and dentin between cavities prepared by Er: YAG laser irradiation and when using an air-turbine. In this study, the usefulness of cavity preparation by Er: YAG laser irradiation in composite resin restoration was suggested.抄録全体を表示PDF形式でダウンロード (3415K) -
Megumi NAGAI, Tohru HAYAKAWA, Akira FUKATSU, Masafumi YAMAMOTO, Masahi ...2002 年 21 巻 3 号 p. 250-260
発行日: 2002年
公開日: 2009/02/12
ジャーナル フリーThe aim of this study was to examine the influence of collagen coating on titanium on the initial attachment of human gingival fibroblasts for the development of the implant with periimplant soft tissue attachment. The morphological changes of cultured human gingival fibroblasts were investigated by scanning electron microcopy (SEM). Four different surfaces, i.e. non-coated mirror-polished titanium, collagen-coated titanium, non-coated tissue-culture polystyrene, and collagen-coated polystyrene were examined. Collagen coating of titanium was effective for enhancing the initial cell attachment. It is expected that collagen coating of titanium implants will improve the attachment of the peri-implant soft tissue to titanium at early stages after the implantation. SEM observation revealed the morphological effect of collagen coating on both titanium and polystyrene surfaces. Many lamellipodia and filopodia were recognized on collagen-coated titanium or polystyrene. Collagen coating improved the activity of human gingival fibroblasts.抄録全体を表示PDF形式でダウンロード (3301K) -
The Effect of Position and the Number of Woven Glass FibersTakahito KANIE, Hiroyuki ARIKAWA, Koichi FUJII, Seiji BAN2002 年 21 巻 3 号 p. 261-269
発行日: 2002年
公開日: 2009/02/12
ジャーナル フリーThis study examined the effects of the position and the number of woven glass fibers on the flexural strength, flexural modulus, and toughness of reinforced denture base resin. The woven glass fiber consisted of 1-4 laminated sheets. Chemical curing was used to polymerize three types of 4-mm-thick test specimens: fibers in compression, fibers in the center, and fibers in tension. Unreinforced specimens were produced as controls. A three-point flexural test was performed and the woven glass fiber content was calculated after the woven glass fiber was fired. The best results were obtained when the woven glass fiber was incorporated outside the base resin under tension, thereby increasing the flexural strength and flexural modulus. Furthermore, the denture base resin reinforced with woven glass fiber was made tougher by increasing the number of woven glass fibers incorporated into the portion under tension.抄録全体を表示PDF形式でダウンロード (894K) -
Masatoshi TAKAHASHI, Masafumi KIKUCHI, Yukyo TAKADA, Osamu OKUNO2002 年 21 巻 3 号 p. 270-280
発行日: 2002年
公開日: 2009/02/12
ジャーナル フリーIn this study, experimental Ti-Ag alloys (5, 10, and 20mass% Ag) and Ti-Cu alloys (2, 5, and 10mass% Cu) were made in an argon-arc melting furnace. The alloys were cast into magnesia molds using an argon gas-pressure dental casting machine, and the mechanical properties and microstructures of the castings were investigated. As the concentration of silver or copper in the alloys increased, the tensile strength, yield strength, and hardness of the alloys became higher than those of CP Ti, and the elongation of the alloys became lower than that of CP Ti. Changes in the mechanical properties by alloying were considered to be caused by solidsolution strengthening of the α-phases and by precipitation of intermetallic compounds.抄録全体を表示PDF形式でダウンロード (2815K)
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