アブストラクト(54巻1号:神奈川歯学)

神奈川歯学

Japanese

Title : 支台築造用コンポジットレジンの曲げ強さと接着性
Subtitle : 原著
Authors : 和田悠希, 青木(三宅)香, 亀山祐佳, 大橋桂, 緑野智康, 押川亮宏, 下山和夫, 二瓶智太郎
Authors(kana) :
Organization : 神奈川歯科大学大学院歯学研究科口腔科学講座クリニカル・バイオマテリアル学分野
Journal : 神奈川歯学
Volume : 54
Number : 1
Page : 1-9
Year/Month : 2019 / 6
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」支台築造は, 崩壊した歯冠形態を回復し, 上部構造物を装着できるようにする処置であり, その目的は補綴物の保持力増大や残存歯質の補強などが挙げられる. 支台築造体は, 口腔内での咬合力, 温度変化, 唾液の存在など厳しい環境下で長期間において, その機能を維持しなければならない. 現在, 支台築造には, 金属の鋳造によるメタルコアと支台築造用コンポジットレジンを用いたレジンコアがある. メタルコアは, 機械的強度が高く, 歯冠崩壊が著しい場合に使用される. しかし, 弾性係数が象牙質より高いことから, ポスト先端に応力集中を起こし, 骨縁下での歯根破折の原因となると報告されている. 一方, レジンコアの機械的強度は, メタルコアと比べて劣るものの, 弾性係数が象牙質と近似しているため, 歯根破折を防止でき, アンダーカット部にも利用できることから, 健全歯質の保存や審美性の点で有利である.
Practice : 歯科学
Keywords : コンポジットレジン, 支台築造, 機械的性質, 接着強さ

English

Title : Flexural strength and adhesion of resin composite for constructing tooth foundation
Subtitle :
Authors : Yuuki WADA, Kaori MIYAKE-AOKI, Yuka KAMEYAMA, Katsura OHASHI, Tomoyasu MIDONO, Akihiro OSHIKAWA, Kazuo SHIMOYAMA, Tomotaro NIHEI
Authors(kana) :
Organization : Division of Clinical Biomaterials, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University
Journal : Kanagawa Shigaku
Volume : 54
Number : 1
Page : 1-9
Year/Month : 2019 / 6
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract] Purpose: The aim of this study was to investigate the three-point bending strength and tensile bond strength to dentin of six resin composites used for building up the core of the tooth. Methods: The resin composites were submitted to a three-point bending test after being stored under the following conditions: dry storage at room temperature for 7 days, storage in water at 37℃ for 7 days, and storage under thermal stress (at 5 and 55℃) for 10,000 cycles. The tensile bond test of the specimen was measured after storing in water at 37℃ for 24 h. The filler content of each resin composite was measured. Data were analyzed using one-way analysis of variance and Tukey's multiple comparison tests (α = 0.05). Results: The three-point bending strengths of all resins were lower than that of dentin; in addition, the strength tended to decrease in five oh the resins after immersion in water or subjection to thermal stress. Significant differences in tensile bond strengths were noted among the six composite resin materials. Positive correlations were observed between the filler content, flexural strength, and flexural modulus. Alternatively, a negative correlation was noted between filler content and tensile bond strength. Conclusions: Thus, resin composites appear to be useful for building up the core of the tooth and preventing root fractures. The tensile bond strength to dentin varied among the six resin composites depending on the type of material.
Practice : Dentistry
Keywords :