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Related Concept Videos

Knee Joint01:23

Knee Joint

3.4K
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.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
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Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
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Function related specifications for total knee arthroplasty implant devices.

Alexander A Fokin1, R David Heekin2

  • 1Heekin Institute for Orthopedic Research, Jacksonville, FL.

Journal of Long-Term Effects of Medical Implants
|March 4, 2014
PubMed
Summary

Current total knee implant specifications are insufficient. A new functional approach and Index of Congruence are proposed for better implant evaluation, surgeon planning, and comparative studies.

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Area of Science:

  • Biomedical Engineering
  • Orthopedic Surgery
  • Medical Device Design

Background:

  • Current total knee implant device specifications analyze components individually, often using non-comparable units.
  • This fragmented approach fails to account for crucial component interactions affecting overall functional capabilities, wear, and survivorship.

Purpose of the Study:

  • To propose a novel, function-related approach to total knee implant specifications.
  • To introduce a standardized methodology for evaluating implant performance and facilitating clinical relevance.

Main Methods:

  • Development of a new functional specification approach for total knee implants.
  • Proposal of a universal "Index of Congruence" for implant standardization.

Main Results:

  • The proposed approach addresses the limitations of current component-specific specifications.
  • The Index of Congruence offers a unified metric for evaluating implant assembly performance.

Conclusions:

  • A function-related specification approach, including the Index of Congruence, is essential for accurate implant evaluation.
  • This standardization will enhance preoperative planning for surgeons and enable robust comparative studies across different implant designs and manufacturers.