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Related Concept Videos

Soundness of Cement01:17

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 ettringite,...
Porosity in Cement Paste01:18

Porosity in Cement Paste

The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is critical—it...

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Related Experiment Video

Updated: Jul 1, 2026

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
11:51

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

[Study on the effect of bone-cement interface with bone cement oscillator].

Yi Wang1, Feng Yan, Dian-chen Song

  • 1Department of Orthopaedics, the First Clinical College of Harbin Medical University, Harbin 150001, China

Zhonghua Wai Ke Za Zhi [Chinese Journal of Surgery]
|September 13, 2008
PubMed
Summary

A bone cement oscillator significantly enhances bone cement-bone interface micro-gomphosis intensity. This innovation promises to reduce the long-term aseptic loosening of artificial prostheses.

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Biological Compatibility Profile on Biomaterials for Bone Regeneration
10:28

Biological Compatibility Profile on Biomaterials for Bone Regeneration

Published on: November 16, 2018

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Last Updated: Jul 1, 2026

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
11:51

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

Biological Compatibility Profile on Biomaterials for Bone Regeneration
10:28

Biological Compatibility Profile on Biomaterials for Bone Regeneration

Published on: November 16, 2018

Area of Science:

  • Orthopedic biomechanics
  • Biomaterials engineering
  • Surgical innovation

Context:

  • Artificial joint replacement surgery relies on secure fixation of prostheses.
  • Aseptic loosening remains a primary cause of long-term implant failure.
  • Improving the bone-cement interface is crucial for implant longevity.

Purpose:

  • To investigate the efficacy of a novel bone cement oscillator in enhancing bone-cement interface micro-gomphosis.
  • To quantitatively assess the mechanical strength of the bone-cement interface under various stress conditions.

Summary:

  • A study involving 100 porcine femurs compared oscillating and control groups for anti-tensile force, anti-pressure, and imaging.
  • Mechanical and CT tests demonstrated significantly greater micro-gomphosis intensity at the bone-cement interface in the oscillating group (P < 0.01).

Impact:

  • The bone cement oscillator effectively increases the micro-gomphosis intensity of the bone-cement interface.
  • This technology has the potential to decrease the incidence of long-term aseptic loosening in artificial prostheses, improving patient outcomes.