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Bones of the Upper Limb: Ulna

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...

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Updated: Sep 9, 2025

Author Spotlight: Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome

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Published on: May 26, 2023

Dynamic Tenodesis Technique for Ulnar Drift With Extensor Tendon Subluxation due to Rheumatoid Arthritis.

Ryo Oda¹, Naoki Okubo¹, Shogo Toyama¹

¹Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Journal of Hand Surgery Global Online

|September 2, 2025

Summary

This study presents a new surgical method for rheumatoid arthritis patients with ulnar drift and extensor tendon subluxation. The dynamic tenodesis technique effectively restored finger joint motion and function without recurrence.

Keywords:

Centralization Extensor tendon subluxation Rheumatoid arthritis Ulnar drift

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Last Updated: Sep 9, 2025

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Published on: May 26, 2023

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Vascularized Composite Hand Allograft Procurement and Preparation for Distal and Proximal Forearm Allotransplantation: A Stepwise Approach

Vascularized Composite Hand Allograft Procurement and Preparation for Distal and Proximal Forearm Allotransplantation: A Stepwise Approach

Published on: May 23, 2025

Area of Science:

Orthopedics
Rheumatology
Hand Surgery

Background:

Rheumatoid arthritis commonly causes ulnar drift (UD) and extensor tendon subluxation.
Functional limitations in the metacarpophalangeal (MCP) joint significantly impact hand function.

Purpose of the Study:

To evaluate the outcomes of an original functional reconstruction procedure for UD with extensor tendon subluxation.
To assess the efficacy of a dynamic tenodesis technique in preserving joint function and preventing recurrence.

Main Methods:

A cohort of 10 patients (31 fingers) with rheumatoid arthritis-induced UD underwent reconstruction between 2018-2022.
A dynamic tenodesis technique involved creating a half-slip tendon and anchoring it to the MCP joint's center of rotation.
Patient-reported outcomes were assessed using the Disabilities of the Arm, Shoulder, and Hand (DASH) and Michigan Hand Outcomes Questionnaire (MHOQ).

Main Results:

Mean MCP joint extension improved from -12° to 1.5° (P < .05), and active arc of motion increased to 95° (P < .05).
Significant improvements were observed in DASH and MHOQ scores, indicating enhanced functional outcomes.
No recurrence of ulnar drift was documented at an average follow-up of 4.5 years.

Conclusions:

The dynamic tenodesis technique offers a viable solution for functional reconstruction of UD with extensor tendon subluxation in rheumatoid arthritis.
This soft tissue reconstruction approach focuses on joint preservation and achieves good functional results without recurrence.