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Updated: Feb 25, 2026

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CAD-CAM義肢材料の表面前処理のための空気磨き装置と砂吹き装置の対比

Kentaro Nakajima1, Yoshiki Ishida1, Daisuke Miura1

  • 1Department of Dental Materials Science, School of Life Dentistry at Tokyo, The Nippon Dental University.

Dental materials journal
|February 23, 2026
PubMed
まとめ

50μmアルミニウムを使用した椅子の横の空気磨きは,CAD-CAM修復のための実験室の砂吹きに匹敵する結合強さを提供します. このテクニックは,人工義肢材料の表面前処理に臨床的に有効な代替手段を提供します.

キーワード:
空気摩擦による摩擦.CAD-CAMで作成したものです.プリートリートメントリアクティベーション リアクティベーションサンドブレイディング (砂吹き)

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Abrasion Resistance of Concrete01:23

Abrasion Resistance of Concrete

Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
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Design Example: Aggregate Gradation

The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
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