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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...

Bones of the Upper Limb: Humerus

Bones of the Upper Limb: Humerus

The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...

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Related Experiment Video

Updated: Jul 19, 2025

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Published on: May 23, 2025

Triceps Rupture After Olecranon Fixation with Proximal Ulna Plate and Suture Augmentation: A Case Report.

Sergio Eduardo Flores¹, Joseph Ryan Sheridan, Eric Stanley Larson

¹Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California.

JBJS Case Connector

|August 17, 2023

Summary

Proximal ulna plate fixation for olecranon fractures can prevent displacement but may cause triceps rupture. This case report details a rare triceps rupture complication and its surgical repair.

Related Experiment Videos

Last Updated: Jul 19, 2025

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Published on: May 23, 2025

Area of Science:

Orthopedic surgery
Trauma care
Surgical complications

Background:

Olecranon fractures are common elbow injuries.
Proximal ulna plate fixation with triceps suture augmentation is a standard treatment.
This technique aims to prevent olecranon escape but carries risks.

Observation:

A rare case of triceps rupture occurred following olecranon fracture fixation.
The rupture was a complication of the surgical repair and hardware placement.
The patient required subsequent triceps repair surgery.

Findings:

Surgical dissection for plate fixation and triceps augmentation can alter the failure mode of olecranon fracture constructs.
Excessive force on the augmented tendon footprint may lead to triceps rupture instead of hardware failure or fracture redisplacement.
Minimizing triceps dissection is crucial during olecranon fracture fixation.

Implications:

Surgeons must be aware of the potential for triceps rupture as a complication.
Techniques to minimize triceps dissection during olecranon fracture fixation should be employed.
Further research may explore modifications to reduce this specific complication.