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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,...
Types of Cement II01:22

Types of Cement II

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 resistance.

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Related Experiment Video

Updated: Jun 8, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
09:31

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty

Published on: February 27, 2018

Cemented versus cementless stems: a verdict is in.

Robert B Bourne1, Kristoff Corten

  • 1Adult Reconstructive Unit, University Hospital, University of Western Ontario, London, Ontario, Canada. robert.bourne@lhsc.on.ca

Orthopedics
|September 16, 2010
PubMed
Summary
This summary is machine-generated.

Cementless total hip replacements (THRs) show superior long-term outcomes compared to cemented THRs for hip osteoarthritis. Cementless options demonstrated better survivorship, particularly for the implant stem over 20 years.

Related Experiment Videos

Last Updated: Jun 8, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
09:31

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty

Published on: February 27, 2018

Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Clinical trial methodology

Background:

  • Hip osteoarthritis significantly impacts quality of life and necessitates joint replacement.
  • Cemented and cementless total hip replacements (THRs) are common surgical options.
  • Long-term comparative data beyond 20 years is crucial for clinical decision-making.

Purpose of the Study:

  • To compare the >20-year clinical and radiographic outcomes of cemented versus cementless total hip replacements (THRs).
  • To evaluate survivorship, functional capacity, and cost-utility of both THR types in end-stage hip osteoarthritis.

Main Methods:

  • Randomized clinical trial involving 250 patients (124 cemented, 126 cementless).
  • Long-term follow-up (20+ years) with clinical and radiographic assessments every 2 years.
  • Validated outcome measures including WOMAC, MAS, SIP, 6-minute walk test, and cost-utility analysis.

Main Results:

  • Cementless THRs demonstrated significantly superior overall, socket, and stem survivorship compared to cemented THRs (P=.01, P=.009, P<.0001 respectively).
  • Younger patients (<65 years) and male sex were associated with poorer socket survivorship in both cemented and cementless groups.
  • The cementless tapered stem achieved 100% survivorship at 20 years, with aseptic loosening as the endpoint.

Conclusions:

  • Cementless total hip replacement is superior to cemented THR for long-term outcomes in hip osteoarthritis.
  • Patient age and sex are important factors influencing THR survivorship.
  • While demonstrating superiority, results should be generalized cautiously to other implant designs.