Cadaveric Biomechanical Analysis of the Distal Radioulnar Joint: Influence of Wrist Isolation on Accurate Measurement and the Effect of Ulnar Styloid Fracture on Stability

2008 ◽  
Vol 33 (5) ◽  
pp. 683-690 ◽  
Author(s):  
Adam J. Mirarchi ◽  
Harry A. Hoyen ◽  
Jayme Knutson ◽  
Steven Lewis
Keyword(s):  
Distal Radioulnar Joint ◽  
Biomechanical Analysis ◽  
Ulnar Styloid ◽  
Radioulnar Joint ◽  
Ulnar Styloid Fracture ◽  
Joint Influence

scholarly journals Prevalence of triangular fibrocartilage complex injuries in patients with distal radius fractures: a 3.0T magnetic resonance imaging study

2019 ◽  
Vol 47 (8) ◽  
pp. 3648-3655
Author(s):  
Bingshan Yan ◽  
Zhaoning Xu ◽  
Yanchao Chen ◽  
Wangping Yin
Keyword(s):  
Distal Radius ◽  
Distal Radioulnar Joint ◽  
Distal Radius Fractures ◽  
Resonance Imaging ◽  
Radius Fractures ◽  
Ulnar Styloid ◽  
Radioulnar Joint ◽  
Ulnar Styloid Fracture ◽  
Triangular Fibrocartilage ◽  
3.0T Mri

Objective This study was performed to determine the prevalence of triangular fibrocartilage complex (TFCC) injuries as shown by 3.0T magnetic resonance imaging (MRI) in patients with distal radius fractures. Methods In total, 57 patients with distal radius fractures underwent 3.0T MRI examinations to observe the incidence of TFCC injuries after manual reduction and cast fixation. The fracture type was categorized by the AO classification, and the TFCC injury pattern was evaluated using the Palmer classification. The correlation between the location of the TFCC injury and the distal radius fracture pattern, distal radioulnar joint instability, or ulnar styloid fracture was analyzed. Results Fifty-five TFCC injuries were diagnosed. There was no significant relationship between the TFCC injury pattern and the type of distal radius fracture, distal radioulnar joint instability, or ulnar styloid fracture. Conclusions This study revealed a high prevalence of TFCC injuries in patients with distal radius fractures. The 3.0T MRI examination helps to assess TFCC injuries in patients with distal radius fractures. Clinical Trial Registration ChiCTR1800017101.

Ulnar Styloid Malunion with Dislocation of the Distal Radioulnar Joint

1998 ◽  
Vol 23 (2) ◽  
pp. 173-175 ◽  
Author(s):  
R. NAKAMURA ◽  
E. HORII ◽  
T. IMAEDA ◽  
E. NAKAO ◽  
K. SHIONOYA ◽  
...  
Keyword(s):  
Corrective Osteotomy ◽  
Distal Radioulnar Joint ◽  
Ulnar Styloid ◽  
Joint Dislocation ◽  
Radioulnar Joint ◽  
Ulnar Styloid Fracture ◽  
Wrist Function

Four patients with dorsal dislocation of the distal radioulnar joint and ulnar styloid malunion had corrective osteotomy of the ulnar styloid. Dislocation of the distal radioulnar joint was reduced in three of four patients. Subluxation persisted in the remaining patient. Wrist function improved in all patients. These results support the contention that a displaced ulnar styloid fracture with distal radioulnar joint dislocation should be reduced and internally fixed. Corrective osteotomy is recommended for malunion of the ulnar styloid associated with dislocation of the distal radioulnar joint.

Ulnar Styloid Fracture with Distal Radioulnar Joint Subluxation/Dislocation

Hand Surgery ◽  
1997 ◽  
Vol 02 (02) ◽  
pp. 141-147
Author(s):  
Ryogo Nakamura ◽  
Emiko Horii ◽  
Toshihiko Imaeda ◽  
Etsuhiro Nakao ◽  
Hitoshi Kato
Keyword(s):  
Computed Tomography ◽  
Distal Radioulnar Joint ◽  
Ulnar Styloid ◽  
Radioulnar Joint ◽  
Ulnar Styloid Fracture ◽  
Distal Radioulnar Joint Subluxation

In 55 patients with ulnar styloid fractures, the site and displacement of the fracture was examined in relation to distal radioulnar joint subluxation/dislocation by computed tomography (CT). Distal radioulnar joint subluxation/dislocation confirmed with CT in 18 of 55 patients, irrespective of the site of the ulnar styloid fracture. In 21 patients with nondisplaced styloid fractures, only 3 fractures were associated with distal radioulnar joint subluxation/dislocation. In 34 patients where the styloid fracture was displaced for 3 mm or more, 15 fractures were associated with a distal radioulnar joint subluxation/dislocation. Therefore, ulnar styloid displacement of 3 mm or more suggests the need for further examination of the distal radioulnar joint.

TRAUMATIC VOLAR DISLOCATION OF THE DISTAL ULNA WITH A FRACTURE OF THE ULNAR STYLOID

Hand Surgery ◽  
2012 ◽  
Vol 17 (03) ◽  
pp. 383-386 ◽  
Author(s):  
Motoki Sonohata ◽  
Hiroko Mine ◽  
Toshiyuki Tsuruta ◽  
Masaaki Mawatari
Keyword(s):  
Functional Disability ◽  
Case Reports ◽  
Forearm Fracture ◽  
Distal Radioulnar Joint ◽  
Emergency Medical Technicians ◽  
Ulnar Styloid ◽  
Distal Ulna ◽  
Ulnar Styloid Fracture ◽  
Type Of Injury

Isolated volar dislocation of the distal ulna without forearm fracture is very rare; however, this injury is incorrectly diagnosed in approximately 50% of cases. This injury can lead to a significant functional disability if left untreated. This report presents a case of isolated volar dislocation of the distal ulna with an ulnar styloid fracture. The dislocation was subsequently reduced, the styloid was surgically repaired, and the patient was satisfied at the last follow-up. The importance of a proper clinical examination and an accurate radiographic position of the wrist are stressed. Furthermore, clinical evaluation of the distal radioular joint after reduction is important in achieving good results. There are various strategies for the treatment of distal radioulnar joint after reduction, including conservative treatment or surgical treatment. We believe that surgical exploration could have been carried out at an earlier stage had such a lesion been suspected. Additional case reports of other instances of successful treatment are needed to educate orthopaedic surgeons and emergency medical technicians on the nature of this type of injury.

The Critical Size of Ulnar Styloid Fragment for the DRUJ Stability

2021 ◽  
Author(s):  
Mauro Maniglio ◽  
Il Jung Park ◽  
Matthias Zumstein ◽  
Michael Kuenzler ◽  
Michelle H. McGarry ◽  
...  
Keyword(s):  
Critical Size ◽  
Fragment Size ◽  
Distal Radioulnar Joint ◽  
Forearm Rotation ◽  
Ulnar Styloid ◽  
Druj Instability ◽  
Ulnar Styloid Fracture ◽  
Fracture Size ◽  
Clinically Significant ◽  
Fracture Types

Abstract Background Ulnar styloid fractures can be associated with clinically significant instability of the distal radioulnar joint (DRUJ). However, the exact fragment size that results in DRUJ instability is unknown. Purpose The objective of this study was to determine the critical size of an ulnar styloid fracture that would result in a significant increase in DRUJ translation and forearm rotation. Methods Eight cadaveric specimens were used to investigate the effects of three different ulnar styloid fracture sizes on DRUJ instability: tip fracture, base fracture, and a fracture including the fovea. Forearm rotation and dorsopalmar DRUJ translation were measured after each sequential increase in fracture size. Results Relative to the uninjured state, a significant increase in forearm rotation and dorsopalmar translation was found for all three fractures. However, the fovea fracture showed a statistically significant increase in forearm rotation compared with all other fracture types and a statistically significant increase in total dorsopalmar translation compared with the tip fracture. Conclusion In this study, ulnar styloid fractures involving the fovea resulted in significantly greater DRUJ instability comparted to tip and base fractures alone. This study provides important biomechanical data regarding the critical size of ulnar styloid fractures that result in DRUJ instability and may aid in the surgical decision-making algorithm in these patients.

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