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Bones of the Upper Limb: Radius

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...

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Distal Radius Osteotomies for Kienbock's Disease-A Minimally Invasive Approach.

Gregory I Bain¹, Sathya Vamsi Krishna², Simon MacLean³

¹Department of Orthopaedic Surgery, Flinders Medical Centre and Flinders University, Adelaide, South, Australia.

Journal of Wrist Surgery

|July 21, 2025

Summary

This summary is machine-generated.

Negative ulnar variance predisposes individuals to Kienbock's disease (KD). This study details minimally invasive radial shortening osteotomy (RSO) and radial closed wedge osteotomy (RCWO) for KD treatment.

Keywords:

Kienbock's disease lunate unloading radial closed wedge osteotomy radial shortening osteotomy single screw shortening osteotomy

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Area of Science:

Orthopedic Surgery
Hand Surgery
Wrist Biomechanics

Background:

Negative ulnar variance is a known risk factor for Kienbock's disease (KD).
Kienbock's disease involves avascular necrosis of the lunate bone in the wrist.
Alleviating stress on the lunate is crucial for managing KD.

Observation:

Radial shortening osteotomy (RSO) decreases radial height, reducing lunate stress.
Radial closed wedge osteotomy (RCWO) reduces radial height and inclination, improving lunate coverage.
Both RSO and RCWO can be performed with minimally invasive techniques, preserving periosteum and stability.

Findings:

A straightforward, minimally invasive RSO technique uses a single cut and screw.
A novel RCWO technique involves two cuts, wedge removal, and single headless screw fixation.
These refined techniques minimize hardware requirements and potential complications like overcorrection.

Implications:

Minimally invasive RSO and RCWO offer effective solutions for Kienbock's disease.
RSO is indicated for KD with negative ulnar variance.
RCWO is preferred for KD with negative ulnar variance and increased radial inclination.