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Related Concept Videos

Knee Joint01:23

Knee Joint

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The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
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In mechanical systems, bearings are crucial in facilitating relative motion between two components while minimizing friction and wear. They help distribute various loads (radial, axial or a combination of both loads) across machinery parts, ensuring smooth and efficient operation.
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Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants
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Bearing surfaces in hip replacement - Evolution and likely future.

Narinder Kumar1, Gen N C Arora2, Barun Datta3

  • 1Senior Advisor (Orthopaedics & Joint Replacement Surgeon), Military Hospital, Kirkee, Pune 411020, India.

Medical Journal, Armed Forces India
|November 11, 2014
PubMed
Summary
This summary is machine-generated.

Total hip arthroplasty (THA) has advanced significantly. Newer bearing surfaces like ceramic-on-ceramic and metal-on-highly crosslinked polyethylene show promise for reducing wear and improving implant longevity, especially in younger patients.

Keywords:
Bearing surfacesEvolutionTotal hip arthroplasty

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Biomedical Engineering

Background:

  • Total hip arthroplasty (THA) has evolved substantially since its inception.
  • Aseptic loosening due to polyethylene wear debris is a primary cause of THA failure.
  • Novel bearing surfaces aim to minimize wear particle generation and enhance implant survival.

Purpose of the Study:

  • To review the evolution of bearing surfaces in total hip arthroplasty.
  • To compare the performance of various bearing surfaces currently in clinical use.
  • To explore emerging technologies for improved THA outcomes.

Main Methods:

  • Literature review of historical and current total hip arthroplasty bearing surfaces.
  • Analysis of clinical data and research on wear rates, friction, and osteolysis.
  • Discussion of the advantages and disadvantages of different articulation types.

Main Results:

  • Metal-on-polyethylene bearings generate significant wear debris, leading to osteolysis.
  • Ceramic-on-ceramic, ceramic-on-highly crosslinked polyethylene, and metal-on-highly crosslinked polyethylene exhibit lower wear rates.
  • Metal-on-metal bearings present safety concerns, while other advanced surfaces show promising clinical results.

Conclusions:

  • Advanced bearing surfaces offer improved wear characteristics compared to traditional metal-on-polyethylene.
  • Ceramic-based and highly crosslinked polyethylene options are suitable for younger, active patients.
  • Continued innovation in bearing surface technology is crucial for enhancing long-term total hip arthroplasty survivorship.