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Updated: Jun 7, 2025

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Laura Haas, Sebastian Hahnel, Angelika Rauch

    The International journal of prosthodontics
    |November 14, 2024
    PubMed
    概括

    树脂改性玻璃离子体水泥 (GIC) 与基于树脂的无尤金醇水泥 (RBEFC) 和基于氧化的临时水泥 (ZOE) 相比,在植入物修复方面提供了更好的保留能力. GIC和RBEFC在植入物凝固方面显示出有希望的结果,尽管RBEFC可能会增加移除难度.

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    The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
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    Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
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    Soundness of Cement

    The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
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    Testing Water Quality01:14

    Testing Water Quality

    When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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