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Related Concept Videos

Stability of Equilibrium Configuration01:23

Stability of Equilibrium Configuration

Understanding the stability of equilibrium configurations is a fundamental part of mechanical engineering. In any system, there are three distinct types of equilibrium: stable, neutral, and unstable.
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
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The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
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Residual Stresses01:26

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Related Experiment Video

Updated: May 13, 2026

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
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Understanding Varus Posteromedial Instability: Biomechanics, Injury Patterns, and Achieving Successful Stability.

Armin Badre1

  • 1Western Hand & Upper Limb Facility, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada.

Hand Clinics
|October 17, 2025
PubMed
Summary
This summary is machine-generated.

Varus posteromedial rotatory instability (VPMRI) diagnosis and management are improved by detailed clinical exams and 3D CT scans of anteromedial facet fractures. This aids in creating reliable treatment algorithms to prevent complications from undertreatment or overtreatment.

Keywords:
Anteromedial facetCoronoidElbow instabilityPMRIPosteromedial instabilityVPMRIVarus posteromedial instability

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Traumatology

Background:

  • Varus posteromedial rotatory instability (VPMRI) is a complex elbow injury.', 'Accurate diagnosis and characterization of anteromedial facet fractures are crucial for effective management.', 'Current management algorithms may lead to undertreatment or overtreatment, increasing complication risks.'], 3D computed tomography (CT) humeral subtraction views offer improved radiographic detail for these subtle fractures.

Purpose of the Study:

  • To enhance the understanding of varus posteromedial rotatory instability (VPMRI).
  • To improve radiographic characterization of anteromedial facet fractures using 3D CT.
  • To develop a reliable algorithm for managing VPMRI, distinguishing between nonoperative and operative treatments.

Main Methods:

  • Detailed clinical examination protocols for VPMRI assessment.
  • Utilizing 3-dimensional computed tomography (3D CT) with humeral subtraction views for radiographic analysis.
  • Developing a management algorithm based on radiographic features of VPMRI.

Main Results:

  • 3D CT humeral subtraction views provide superior characterization of anteromedial facet fractures.
  • A structured approach based on radiographic findings can reliably differentiate injury severity.
  • The proposed algorithm aims to guide appropriate nonoperative versus operative decision-making.

Conclusions:

  • Improved radiographic assessment, particularly with 3D CT, is key to understanding VPMRI.
  • A detailed assessment algorithm can optimize management strategies for VPMRI.
  • This approach helps avoid complications associated with undertreatment and overtreatment of elbow instability.