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Videos de Conceptos Relacionados

Setting Time of Cement01:12

Setting Time of Cement

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The setting time of cement refers to the process of cement paste transitioning from a plastic state to a solid state. This process is crucial in construction as it dictates the timeframe for concrete placement, compaction, and finishing. The onset of this solidification is termed the initial set, indicating when the paste becomes unworkable. The final set is when the paste has solidified completely, and further handling or manipulation can no longer affect its shape. The cement strength is...
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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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Soundness of Cement01:17

Soundness of Cement

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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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Portland Cement01:21

Portland Cement

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Portland cement is the essential binding ingredient in concrete, made from finely ground materials including lime, iron, silica, and alumina. Lime is derived primarily from limestone, marble, marl, seashells, and clays, which also supply iron and alumina, while silica is sourced from sand, chalk, and bauxite. Contemporary manufacturing of Portland cement is a significant source of carbon dioxide emissions, prompting research into reducing its content in concrete through alternative...
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Fineness of Cement01:15

Fineness of Cement

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The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...
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Strength of Cement01:20

Strength of Cement

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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.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
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Pull-off bond strength of orthodontic molar bands cemented to enamel with novel calcium silicate, glass ionomer, and zinc phosphate cement.

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Video Experimental Relacionado

Updated: Feb 13, 2026

Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way
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Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way

Published on: November 21, 2017

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Cemento de silicato de calcio hidráulico de fijación rápida para la cementación de la corona.

Atefeh Nemati Karimooy1, Bahram Ranjkesh2, Dirk Leonhardt3

  • 1Section for Oral Ecology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.

Journal of prosthodontics : official journal of the American College of Prosthodontists
|February 11, 2026
PubMed
Resumen

El cemento hidráulico de silicato de calcio de fijación rápida (CSC de fijación rápida) muestra un espesor de película, resistencia a la tracción diametral y resistencia a la retención de la corona comparables a los cementos de luting convencionales, lo que indica un potencial para la cementación de la corona.

Palabras clave:
El cemento de silicato de calcio es un cemento de silicato de calcio.La cementación es la cementación.Las coronas dentales son coronas dentales.Prueba de arranque y arranque.la retención de la retención.

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Área de la Ciencia:

  • Materiales dentales Ciencias de la ciencia.
  • Ingeniería de Biomateriales Ingeniería de Biomateriales
  • Odontología Restaurativa Odontología Restaurativa.

Sus antecedentes:

  • Los cementos de lución convencionales se enfrentan a limitaciones en el rendimiento clínico.
  • Los cementos hidráulicos de silicato de calcio (CSC) de rápida fijación ofrecen avances potenciales en los procedimientos de restauración dental.

Objetivo del estudio:

  • Para evaluar el grosor de la película, la resistencia a la tracción diametral (DTS) y la resistencia a la retención de la corona de un CSC hidráulico de ajuste rápido.
  • Para comparar el CSC de ajuste rápido con el cemento de fosfato de zinc convencional y el cemento de ionómero de vidrio para aplicaciones de lutado.

Principales métodos:

  • El grosor de la película se midió según la norma ISO 9917-1:2007.
  • La resistencia a la tracción diametral (DTS) se evaluó utilizando muestras cilíndricas después de 7 días de almacenamiento húmedo.
  • La fuerza de retención de la corona se determinó mediante pruebas de extracción de coronas metálicas cementadas en molares extraídos después de 10.000 ciclos térmicos.

Principales resultados:

  • Todos los cementos probados, incluido el CSC de ajuste rápido, exhibieron espesores de película por debajo del umbral de 25 μm.
  • El CSC de ajuste rápido demostró DTS comparable a los cementos de ionómero de vidrio y fosfato de zinc.
  • No se observaron diferencias significativas en la resistencia a la retención de la corona entre los tres tipos de cemento, predominando las fallas mixtas.

Conclusiones:

  • Fast-set CSC posee un espesor de película aceptable y comparable DTS y la fuerza de retención de la corona a los cementos de luting convencionales.
  • Los resultados sugieren un potencial clínico prometedor para el CSC de ajuste rápido en la cementación de la corona.
  • Se requiere más investigación para explorar completamente la utilidad clínica de la CCS de ajuste rápido.