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Erschienen in: Surgical and Radiologic Anatomy 3/2016

15.09.2015 | Original Article

How does wrist position affect the length of the distal radioulnar ligament: a three-dimensional image study in vivo?

verfasst von: Jing Chen, Yu Cheng Sun, Qing Zhong Chen, Ai Xian Zhang, Jun Tan

Erschienen in: Surgical and Radiologic Anatomy | Ausgabe 3/2016

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Abstract

Purpose

This study was designed to investigate the length changes of the distal radioulnar ligament at different wrist positions and to determine the effect of hyperextension on the distal radioulnar ligament and to find out the most vulnerable position where the distal radioulnar ligament rupture and foveal avulsion.

Methods

We obtained computed tomography scans of the wrists for 12 volunteers including two groups: hyperextension group and hyperextension with maximal rotation group. The images were reconstructed to the three-dimensional bone structures with customized software. The four portions of the distal radioulnar ligament were measured and analyzed statistically.

Results

No significant differences were noted in the lengths of the each portion of the distal radioulnar ligament among neutral position, wrist hyperextension, and hyper-radial extension. From neutral position to hyperextension with maximal pronation, the lengths of the palmar superficial radioulnar ligament (psRU) and dorsal deep radioulnar ligament (ddRU) decreased significantly, whereas the dorsal superficial radioulnar ligaments (dsRU) and palmar deep radioulnar ligament (pdRU) increased significantly. From neutral position to hyperextension with maximal supination, the lengths of the pdRU and dsRU ligaments decreased significantly, and the lengths of psRU and ddRU ligaments changed little.

Conclusions

The factor of hyperextension has little effect on the length of the distal radioulnar ligament and the distal radioulnar ligament may be under great tension at the position of hyperextension with maximal pronation. These findings can provide more information to understand the pathomechanics of the triangular fibrocartilage complex injury caused by a fall on the outstretched hand and can provide information relevant to the distal radioulnar ligament restoration.
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Metadaten
Titel
How does wrist position affect the length of the distal radioulnar ligament: a three-dimensional image study in vivo?
verfasst von
Jing Chen
Yu Cheng Sun
Qing Zhong Chen
Ai Xian Zhang
Jun Tan
Publikationsdatum
15.09.2015
Verlag
Springer Paris
Erschienen in
Surgical and Radiologic Anatomy / Ausgabe 3/2016
Print ISSN: 0930-1038
Elektronische ISSN: 1279-8517
DOI
https://doi.org/10.1007/s00276-015-1555-z

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