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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 short...

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Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

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Published on: February 17, 2023

Corrective distal radius osteotomy: including bilateral differences in 3-D planning.

J G G Dobbe¹, J C Vroemen, S D Strackee

¹Department of Biomedical Engineering and Physics, Academic Medical Center, University of Amsterdam, Room No. L0-113-3, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands. j.g.dobbe@amc.uva.nl

Medical & Biological Engineering & Computing

|March 6, 2013

Summary

This study introduces a new 3-D planning method for corrective distal radius osteotomy. It compensates for bone length differences, significantly improving accuracy in planning corrective surgeries for distal radius malunions.

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Area of Science:

Orthopedic surgery
Medical imaging
Biomechanical engineering

Background:

Distal radius fractures can heal in suboptimal positions, impairing hand function and potentially leading to osteoarthritis.
Current 3-D planning uses the contralateral radius as a mirror, but bilateral asymmetry can cause length errors.
Ulna asymmetry is often concomitant with radius asymmetry and can be used to improve planning accuracy.

Purpose of the Study:

To investigate a novel method for planning corrective osteotomy of the distal radius.
To compensate for bilateral length differences during preoperative planning using ulna asymmetry.
To improve the accuracy of 3-D planning for distal radius malunions.

Main Methods:

A linear regression model was developed to describe the relationship between radius and ulna asymmetry.
The method was evaluated using CT scans from 20 healthy individuals (quantitative) and patients with distal radius malunion (qualitative).
The planning method incorporates ulna length data to correct for radius length discrepancies.

Main Results:

The improved planning method reduced absolute length deviations by a factor of two.
Positioning variation decreased significantly, from 2.9 ± 2.1 mm to 1.5 ± 0.6 mm.
The method demonstrated enhanced accuracy in preoperative planning for corrective osteotomy.

Conclusions:

The developed method effectively compensates for bilateral length differences in distal radius planning.
This approach is expected to enhance the precision of 3-D planning for corrective distal radius osteotomies.
The technique offers a valuable improvement for surgical planning in cases of distal radius malunion.