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Related Concept Videos

Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

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 short...
Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Bones of the Upper Limb: Ulna01:15

Bones of the Upper Limb: Ulna

The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side of the...

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Related Experiment Video

Updated: Jun 17, 2026

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation
11:21

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation

Published on: March 13, 2026

Treatment of Perilunate Injuries With Radial-sided Fixation.

Justin E Kleiner1, William Dotterweich2, Andrew Stein3

  • 1Mount Sinai Hospital, New York, NY, USA.

Hand (New York, N.Y.)
|June 16, 2026
PubMed
Summary
This summary is machine-generated.

This study shows that treating perilunate injuries with fixation only on the radial side effectively restores carpal alignment. This simplified approach avoids the need for lunotriquetral stabilization in high-energy wrist injuries.

Keywords:
lunateoutcomessurgerytraumawrist

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Area of Science:

  • Orthopedic Surgery
  • Trauma Surgery
  • Wrist Biomechanics

Background:

  • Perilunate dislocations and fracture-dislocations are severe wrist injuries requiring prompt treatment.
  • Standard treatment involves open reduction and fixation of both radial (scapholunate) and ulnar (lunotriquetral) intervals.
  • This study investigates a simplified approach focusing on radial-sided fixation for these injuries.

Purpose of the Study:

  • To evaluate the efficacy of radial-sided fixation alone in managing acute perilunate injuries.
  • To determine if separate lunotriquetral stabilization is necessary when addressing radial-sided injuries.
  • To present the largest case series to date using this simplified fixation protocol.

Main Methods:

  • A retrospective review of 36 patients with acute perilunate injuries treated with radial-sided fixation.
  • Urgent closed reduction followed by Kirschner wire or headless compression screw fixation for radial-sided injuries.
  • Immobilization in a short arm cast for 8 weeks, with radiographic assessment of carpal alignment and stability.

Main Results:

  • All patients achieved stable carpal alignment with radial-sided fixation.
  • Mean scapholunate angle was 55°, mean scapholunate interval 1.8 mm, and mean lunotriquetral interval 1.7 mm.
  • No patients developed VISI or DISI deformity postoperatively.

Conclusions:

  • Fixation limited to the radial side is an effective management strategy for perilunate injuries.
  • This approach simplifies surgical management by eliminating the need for lunotriquetral pinning.
  • Excellent radiographic outcomes support this technique, challenging traditional treatment paradigms.