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Related Concept Videos

Knee Joint01:23

Knee Joint

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 group...
Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...

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Related Experiment Video

Updated: Jun 20, 2026

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
07:45

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report

Published on: August 4, 2022

Component version in modular total hip revision.

Michael A Kopec1, Aaron Pemberton, Joseph C Milbrandt

  • 1Division of Orthopaedics and Rehabilitation, Southern Illinois University School of Medicine Springfield, IL 62794-9679, USA.

The Iowa Orthopaedic Journal
|September 11, 2009
PubMed
Summary
This summary is machine-generated.

Modular femoral prostheses offer crucial flexibility in revision hip arthroplasty, accommodating complex proximal femur anatomy. This study found modular components effectively address metaphyseal retroversion and diaphyseal varus, unlike traditional stems.

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

Published on: February 27, 2018

Related Experiment Videos

Last Updated: Jun 20, 2026

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
07:45

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report

Published on: August 4, 2022

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
  • Biomedical Engineering
  • Radiology

Background:

  • Revision total hip arthroplasty presents challenges due to proximal femur morphologic changes.
  • Metaphyseal retroversion and diaphyseal varus are frequently encountered in revision hip surgery.
  • Standard monobloc stems have limitations in addressing these complex femoral anatomies.

Purpose of the Study:

  • To evaluate the positioning capabilities of modular femoral prostheses in revision total hip arthroplasty.
  • To assess the ability of modular components to accommodate proximal femoral deformities.
  • To compare component positioning in modular vs. non-modular stems.

Main Methods:

  • Retrospective analysis of 21 revision total hip arthroplasties using modular femoral prostheses.
  • Acquisition of three radiographic views (A/P, surgical lateral, true lateral) for each femur.
  • Creation of CAD models to determine the range of modular component positioning and analyze femoral morphologic parameters.

Main Results:

  • 81% of cases exhibited metaphyseal retroversion and/or varus stems.
  • Modular components allowed for a wide range of positioning to address these deformities.
  • Only 5% of cases achieved component orientation comparable to non-modular prostheses, highlighting modularity's advantage.

Conclusions:

  • Modular femoral prostheses provide essential options for managing proximal femoral remodeling in revision hip arthroplasty.
  • These components offer superior adaptability compared to monobloc stems for complex femoral anatomies.
  • Modular systems enhance surgical outcomes by facilitating optimal component placement in challenging revision cases.