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Pivot Bearings01:23

Pivot Bearings

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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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Bearings: Problem Solving01:24

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Bearing Stress01:22

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Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
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Positron Emission Tomography Using 64-Copper as a Tracer for the Study of Copper-Related Disorders
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Ti6Al4V-Bioglass-Copper Composites for Load-Bearing Implants.

Lochan Upadhayay1, Bryson White1, Susmita Bose1

  • 1W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, USA.

Advanced Healthcare Materials
|January 27, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel titanium composite for joint implants, enhancing wear resistance and biocompatibility. The new material offers improved strength and inherent antibacterial properties, addressing concerns with current implant materials.

Keywords:
45S5 BioglassStaphylococcus aureusTi6Al4Vadditive manufacturingtribofilmwear

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Area of Science:

  • Biomaterials Science
  • Materials Engineering
  • Orthopedic Surgery

Background:

  • Cobalt-chromium alloys in hip and knee replacements raise concerns about cobalt ion release.
  • Ceramic alternatives face challenges with long-term mechanical stability.
  • Ti6Al4V (Ti64) shows promise but lacks sufficient wear resistance for articulating surfaces.

Purpose of the Study:

  • To develop a novel Ti64-based composite with enhanced wear resistance, biocompatibility, and antibacterial properties for orthopedic implants.
  • To investigate the effects of incorporating 45S5 bioglass (BG) and copper (Cu) into Ti64.
  • To evaluate the material's performance using various characterization and testing methods.

Main Methods:

  • Laser-directed energy deposition (L-DED) additive manufacturing was used to create Ti64, Ti64-1 wt% BG, Ti64-3 wt% BG, and Ti64-3 wt% BG-3 wt% Cu composites.
  • Microstructural characterization and phase analysis were performed.
  • Uniaxial compression, biotribological, in vitro biocompatibility (osteoblast cells), and antibacterial (Staphylococcus aureus) tests were conducted.

Main Results:

  • BG addition localized at melt pool boundaries, while Cu distributed uniformly.
  • Incorporation of BG and Cu increased the composite's strength.
  • Wear resistance significantly improved due to BG and Cu, with a protective nanoscale tribofilm forming on BG-containing samples.
  • Enhanced biocompatibility with human osteoblast cells and inherent antibacterial properties from copper were observed.

Conclusions:

  • The novel Ti64-BG-Cu composite demonstrates superior performance compared to traditional materials.
  • This advanced biomaterial offers enhanced biocompatibility, antibacterial characteristics, and wear resistance.
  • The findings suggest a promising new material for total hip and knee arthroplasty applications, potentially reducing revision rates and improving patient outcomes.