Related Experiment Video
Updated: Apr 19, 2026
06:40
Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies
Published on: January 11, 2019
12.6K
Analysis of ulnar variance as a risk factor for developing scaphoid nonunion
S Lirola-Palmero1, G Salvà-Coll2, F J Terrades-Cladera1
1Departamento de Cirugía Ortopédica y Traumatología, Hospital Son Llàtzer, Palma de Mallorca, España.
Revista Espanola De Cirugia Ortopedica Y Traumatologia
|December 10, 2014
Summary
Patients with a scaphoid fracture and ulnar variance less than -1mm have a significantly higher risk of nonunion. This finding highlights ulnar variance as a crucial factor in scaphoid fracture healing.
Area of Science:
- Orthopedic Surgery
- Radiology
- Hand Surgery
Background:
- Scaphoid fractures are common wrist injuries.
- Predicting scaphoid fracture union can be challenging.
- Ulnar variance has been investigated as a potential risk factor for nonunion.
Purpose of the Study:
- To investigate the association between ulnar variance and scaphoid nonunion.
- To determine if ulnar variance is a significant predictor of scaphoid fracture healing.
Main Methods:
- Retrospective review of 95 posteroanterior wrist radiographs of patients with scaphoid fractures.
- Inclusion criteria: fractures with <1mm displacement, treated conservatively.
- Measurement of ulnar variance in all included patients.
Main Results:
- Eighteen patients (19%) developed scaphoid nonunion.
- Mean ulnar variance in nonunion group: -1.34 mm (p<.05).
- Patients with ulnar variance < -1mm showed a 4.58 times higher odds of nonunion (p<.007).
Conclusions:
- Ulnar variance is a significant risk factor for scaphoid nonunion.
- A ulnar variance less than -1mm increases the likelihood of scaphoid fracture healing complications.
- Radiological assessment of ulnar variance may aid in risk stratification for scaphoid fractures.
More Related Videos
Related Concept Videos
01:15Bones of the Upper Limb: Ulna
11.2K
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...
11.2K
01:09Bones of the Upper Limb: Radius
11.7K
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...
The radius has a nail-shaped head, and a...
11.7K
01:12Arteries of the Upper Limbs
3.3K
The subclavian artery transitions into the axillary artery as it exits the chest and enters the axillary region. This artery is critical for supplying blood to the shoulder area, including the head of the humerus, through the humeral circumflex arteries. As the vessel continues into the upper arm or brachium, it becomes the brachial artery. This artery plays a key role in vascularizing the brachial region and bifurcates at the elbow into several branches. These branches include the deep...
3.3K