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Related Concept Videos

Ankle Joint01:10

Ankle Joint

2.0K
The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Stability of Equilibrium Configuration01:23

Stability of Equilibrium Configuration

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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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Related Experiment Video

Updated: Sep 30, 2025

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
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Does an Internal Joint Stabilizer and Standardized Protocol Prevent Recurrent Instability in Complex Persistent Elbow

Ching-Hou Ma1,2, Yu-Huan Hsueh1,3, Chin-Hsien Wu1,3

  • 1Department of Orthopedics, E-Da Hospital, Kaohsiung, Taiwan.

Clinical Orthopaedics and Related Research
|March 10, 2022
PubMed
Summary
This summary is machine-generated.

This study shows that an internal joint stabilizer effectively treats complex persistent elbow instability, improving pain and function without worsening arthritis. Patients should be aware of potential complications and the need for device removal.

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Area of Science:

  • Orthopedic Surgery
  • Trauma Reconstruction
  • Elbow Instability Management

Background:

  • Complex persistent elbow instability post-trauma presents treatment challenges due to varied surgical techniques and high arthritis progression rates.
  • Existing internal joint stabilizers show promise, but standardized protocols for complex cases and the impact of arthritis on outcomes require further investigation.

Purpose of the Study:

  • To evaluate the efficacy of a hinged internal joint stabilizer with a standardized protocol in preventing recurrent instability and complications.
  • To assess pre- to postoperative improvements in pain, disability, elbow performance, and range of motion (ROM).
  • To determine if post-traumatic arthritis development impacts functional outcomes.

Main Methods:

  • Retrospective analysis of 14 patients with complex persistent elbow instability treated with an internal joint stabilizer and standardized protocol.
  • Protocol included debridement arthroplasty, ulnar neurolysis, bony/ligamentous restoration, stabilizer application, and early rehabilitation.
  • Outcomes assessed via radiographs, complication review, VAS pain scores, DASH, MEPS, and ROM measurements; patients grouped by arthritis development.

Main Results:

  • No recurrent instability was observed. Significant improvements in pain (VAS), disability (DASH), function (MEPS), and ROM were noted (p < 0.001).
  • Seven patients experienced complications (wound infection, seroma, neurovascular injury, hardware issues, heterotopic ossification).
  • No significant differences in postoperative pain, disability, function, or ROM were found between patients with and without post-traumatic arthritis.

Conclusions:

  • An internal joint stabilizer with a standardized protocol effectively manages complex persistent elbow instability, improving functional outcomes and allowing early motion.
  • The treatment did not negatively impact outcomes in the presence of post-traumatic arthritis.
  • Patients require counseling regarding potential complications, including those related to radial head prostheses and the need for a secondary removal procedure.