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相关概念视频

Hydration of Cement01:24

Hydration of Cement

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Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
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Biofilms01:29

Biofilms

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Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Mortar Properties01:17

Mortar Properties

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Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
399
Pozzolans01:21

Pozzolans

453
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
453
Types of Cement II01:22

Types of Cement II

371
Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
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Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
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相关实验视频

Updated: Jan 10, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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Published on: December 20, 2024

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探索生物活性玻璃离子体水泥的多功能潜力

J O Makanjuola1, R G Hill2, S A Niazi1,3

  • 1Centre for Oral, Clinical & Translational Sciences, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, Guy's Hospital, London, UK.

Journal of dental research
|November 27, 2025
PubMed
概括

这项研究引入了一种新的无生物活性玻璃 (J-BAG),用于玻璃离子体水泥 (GIC). 结合J-BAG可以提高机械强度,离子释放,抗菌性能和矿化,提供更好的牙修复材料.

关键词:
抗微生物药物/抗微生物耐药性生物活性材料是生物活性材料.生物膜 (BioFilm) 是一种生物膜.玻璃离子体是一种玻璃离子体.机械性能 机械性能 机械性能矿物化的组织/发育.

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科学领域:

  • 生物材料科学 生物材料科学
  • 牙科材料科学 牙科材料科学
  • 纳米技术纳米技术

背景情况:

  • 在玻璃离子体水泥 (GIC) 中的传统生物活性玻璃可改善矿化,但由于高含量,其机械性能不佳.
  • 需要具有增强机械和治疗性质的先进GIC,以改善临床结果.

研究的目的:

  • 为GICs研究一种新的无,化物和丰富的生物活性玻璃 (J-BAG).
  • 评估J-BAG结合对GICs机械性能,离子释放,抗菌功效和矿化能力的影响.

主要方法:

  • 合成了J-BAG (38.3SiO2-6P2O5-43.9CaO-6.8CaF2-5MgO) 和实验性的离子体玻璃,使用融灭技术.
  • 将J-BAG纳入实验Mg-Zn和参考Fuji IXGIC,重量百分比不同 (5%,10%,15%).
  • 在实验室中评估了机械性能 (压力强度,曲强度,微硬度),离子释放,对空心生物膜的抗菌活性和矿化能力.

主要成果:

  • 与未经修改的对照组相比,J-BAG的结合 (5-10重量%) 显著改善了GIC的压力强度,屈曲强度和微硬度.
  • 在J-BAG修饰的GIC中观察到增强的化物,和离子释放.
  • J-BAG增强了对多种菌生物膜的抗菌疗效,并促进了脱矿性牙表面显著的矿物沉积.
  • 在Mg-Zn GIC (LG5) 中,最佳的J-BAG负荷为5%,在Fuji IX (F10) 中为10%.

结论:

  • 新型无J-BAG在最佳度纳入GIC时,同时增强机械性能,离子释放,抗菌活性和矿化.
  • 这些多功能J-BAG修改的GIC代表了创伤后修复治疗和长期牙康复的有希望的进步,特别是在高病风险患者中.