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Related Concept Videos

Pivot Bearings01:23

Pivot Bearings

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.
A pivot bearing is a specialized type of bearing designed to support axial loads on a rotating shaft. The bearing surface, or the pivot, is positioned at the end of a shaft to support the axial thrust. The pivot may...
Bearings: Problem Solving01:24

Bearings: Problem Solving

Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...

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Related Experiment Video

Updated: Jun 30, 2026

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

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[Bearing selection in total hip arthroplasty].

R Sonntag1, J Reinders1, U Müller1

  • 1Klinik für Orthopädie und Unfallchirurgie, Labor für Biomechanik und Implantatforschung, Universitätsklinikum Heidelberg, Zentrum für Orthopädie, Unfallchirurgie und Paraplegiologie, Heidelberg.

Zeitschrift Fur Orthopadie Und Unfallchirurgie
|September 15, 2015
PubMed
Summary

Surgeons need evidence to choose total hip arthroplasty bearing materials. This review provides criteria for selecting bearing materials based on wear performance and revision rates.

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Medical device engineering

Context:

  • Total hip arthroplasty (THA) involves diverse bearing materials, with surgeons choosing between hard-on-soft, hard-on-hard, and alternative options.
  • Material selection in THA ideally requires evidence-based data on wear performance, revision surgery incidence, and bearing-associated risks for patient-specific material combinations.

Purpose:

  • To establish evidence-based bearing selection criteria for surgeons performing total hip arthroplasty.
  • To review current literature on the performance of various bearing material combinations in THA.

Summary:

  • The article reviews bearing materials used in total hip arthroplasty (THA), including hard-on-soft, hard-on-hard, and alternative options.
  • It highlights the need for evidence-based selection criteria, addressing data gaps for certain material combinations.
  • The review focuses on wear performance, revision rates, and associated risk factors for different THA bearing materials.

Impact:

  • Aims to guide orthopedic surgeons in making informed decisions regarding THA bearing material selection.
  • Contributes to optimizing patient outcomes by promoting the use of materials with proven performance and lower risk profiles.
  • Addresses a critical need for comprehensive data to support the choice of bearing materials in total hip replacement surgery.