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Related Concept Videos

Bones of the Upper Limb: Radius01:09

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The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a...
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Updated: May 16, 2025

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
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Interosseous Membrane Reconstructions for Longitudinal Radioulnar Instability: A Cadaveric Comparison.

A Jordan Grier1, Scott E Dart2, Patrick Marinello3

  • 1OrthoCarolina Hand Center, Charlotte, NC, USA.

Hand (New York, N.Y.)
|May 12, 2025
PubMed
Summary
This summary is machine-generated.

Pronator teres transfer with suture button suspension effectively restores radioulnar stability after interosseous membrane reconstruction. Augmentation with suture buttons did not significantly alter stability compared to pronator teres transfer alone.

Keywords:
Essex-Loprestibiomechanicalforearm instabilityinterosseous membraneradial head replacementsuture button

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Area of Science:

  • Orthopedic surgery
  • Biomechanical engineering
  • Upper extremity reconstruction

Background:

  • Interosseous membrane (IOM) reconstruction offers multiple material options.
  • This study evaluates biomechanical properties of IOM reconstruction using suture button suspension with and without pronator teres (PT) tendon rerouting.

Purpose of the Study:

  • To biomechanically assess the efficacy of suture button suspension in interosseous membrane reconstruction.
  • To compare radioulnar displacement with and without pronator teres tendon transfer and suture button augmentation.

Main Methods:

  • Eight cadaveric specimens were tested under various conditions: intact, IOM release with radial head (RH) resection, PT tendon transfer alone, and PT transfer with suture button suspension (with/without RH replacement).
  • Specimens underwent cyclic loading to 130 N, with radioulnar displacement measured.
  • Statistical analysis used a repeated measure 1-way ANOVA and Tukey test (P < .05).

Main Results:

  • IOM reconstruction with PT graft and suture button suspension (with RH arthroplasty) did not significantly reduce radioulnar displacement (2.99 ± 1.92 mm vs. 2.88 ± 1.56 mm).
  • Suture button suspension augmentation did not significantly increase the stiffness of the PT IOM reconstruction construct with RH arthroplasty (82.48 N/mm vs. 71.51 N/mm).

Conclusions:

  • Pronator teres transfer combined with suture button augmentation effectively restores radioulnar stability.
  • No significant difference in stability was found between PT transfer with and without suture button suspension augmentation.