scholarly journals Sonographic Findings in Adult Congenital Madelung Deformity: A Case Study

2019 ◽  
Vol 36 (1) ◽  
pp. 65-71
Author(s):  
Viviane Créteur ◽  
Afarine Madani ◽  
Stefano Bianchi
Keyword(s):  
Distal Radius ◽  
Imaging Technique ◽  
Distal Radioulnar Joint ◽  
Pronator Quadratus ◽  
Correlative Imaging ◽  
Madelung Deformity ◽  
Cortical Defect ◽  
Adult Congenital ◽  
Rare Malformation

This case study describes six sonographic findings, with correlative imaging, in an adult patient with congenital Madelung deformity. Two are typical of congenital Madelung deformity: a thick volar hyperechoic band extending from the ulnar side of the distal radius toward the lunate-triquetrum area, the so-called Vickers ligament, adjacent to the radiotriquetral ligament, and a cortical defect on the ulnar and volar side of the distal radius. Other findings may be also observed, such as a narrowed distance between the Lister tubercle and the distal radioulnar joint, a dorsal subluxation of the ulnar head, an extensor tendons entrapment and pronator quadratus modifications. Although the diagnosis of congenital Madelung deformity is based usually on clinical examination, this rare malformation may remain undiscovered until adulthood. When sonography is used as the first imaging technique, the sonographic findings of congenital Madelung deformity can facilitate diagnosis and the appropriate radiographs.

Should We Repair the Pronator Quadratus in a Distal Radius Fracture with an Ulnar Styloid Base Fracture? A Biomechanical Study

2021 ◽  
Author(s):  
Mauro Maniglio ◽  
Victor Truong ◽  
Matthias Zumstein ◽  
Lilianna Bolliger ◽  
Michelle H. McGarry ◽  
...  
Keyword(s):  
Distal Radius ◽  
Distal Radioulnar Joint ◽  
Biomechanical Study ◽  
Forearm Rotation ◽  
Ulnar Styloid ◽  
Pronator Quadratus ◽  
Volar Approach ◽  
Druj Instability ◽  
Cadaveric Model

Abstract Background Merits of repairing the pronator quadratus (PQ) to restore distal radioulnar joint (DRUJ) stability after a volar approach remain controversial. Distal radius fractures are often associated with ulnar styloid fractures (USF). When involving the fovea, this USF can lead to a DRUJ instability. The PQ repair may be key in reducing this DRUJ instability. Methods This study aims to assess the biomechanical role of PQ repair in a cadaveric model of USF. In 17 forearm specimens, a USF including the fovea was executed. Positional changes of the DRUJ in forearm rotation and dorso-palmar (DP) translation were measured with variable loads (0, 2.5, and 5N) applied to the PQ origin. Results Forearm rotation and DP-translation decreased significantly with PQ loading of 5N, changing on average by 5 degrees and 0.6 mm, respectively. Conclusion We found a significant decrease in forearm rotation and DP-translation comparing a fully loaded PQ to an unloaded PQ in our cadaveric model.

scholarly journals Madelung Deformity: Diagnosis and Treatment Options

2021 ◽  
Vol 49 (02) ◽  
pp. e140-e154
Author(s):  
Ricardo Kaempf de Oliveira ◽  
Samuel Ribak ◽  
João Pedro Farina Brunelli ◽  
Márcio Aita ◽  
Pedro J. Delgado
Keyword(s):  
Distal Radius ◽  
Treatment Options ◽  
Surgical Techniques ◽  
Distal Radioulnar Joint ◽  
Lunate Bone ◽  
Radioulnar Joint ◽  
Madelung Deformity ◽  
Computed Tomography Scans ◽  
Tridimensional Reconstruction ◽  
Loss Of Motion

AbstractMadelung deformity (MD) comprises an increased volar and ulnar tilt of the joint facet of the distal radius, secondary to an idiopathic physeal dysplasia. Such change causes radial shortening and consequent distal ulnar prominence, along with wrist pain and loss of motion. Surgery becomes an option in patients with severe deformity that do not respond to conservative treatment.The classic surgical techniques are problematic for adults, as they are specific for children and adolescents, whose radial physis is still open. Very few papers discuss the treatment of adult patients; furthermore, most are focused on the distal radioulnar joint, and thus do not approach the origin of the pathology.When analyzing computed tomography scans with tridimensional reconstruction, a feature of MD, growth arrest of the volar and ulnar portions of the distal radius, is noted, causing the typical distal radius deformity that leads to lack of coverage of the lunate bone. That leads to palmar subluxation of the lunate bone and consequent radiocarpal instability.We herein describe the possibilities of treatment in different stages of evolution, summarizing the authors' view on MD.

In vivo measurement of distal radioulnar translation following distal radius fracture

2021 ◽  
pp. 175319342110166
Author(s):  
Grey E. B. Giddins ◽  
Greg T. Pickering
Keyword(s):  
Distal Radius Fracture ◽  
Distal Radius ◽  
Distal Radioulnar Joint ◽  
Wrist Fracture ◽  
Radius Fracture ◽  
Normal Range ◽  
Radioulnar Joint ◽  
In Vivo Measurement ◽  
Objectively Measured

The incidence of distal radioulnar joint instability following a distal radius fracture is estimated around one in three based upon clinical examination. Using a validated rig, we objectively measured distal radioulnar joint translation in vivo following distal radius fracture. Dorsopalmar translation of the distal radioulnar joint was measured in 50 adults with previous distal radius fractures. Measurements were compared with the uninjured wrist and against a database of previous measurements within healthy and clinically lax populations. Translation at the distal radioulnar joint was greater in injured wrists at 12.2 mm (range 10–15, SD 1.2) than the uninjured wrists at 6.4 (range 4–9, SD 0.8) ( p < 0.001) and was always outside the established normal range. There was no statistically significant link between translation and the severity of the injury. Instability appears almost inevitable following a distal radius (wrist) fracture, albeit subclinical in the vast majority.

Classification and Management of Failed Fixation of the Volar Marginal Fragment in Distal Radius Fractures

2021 ◽  
Author(s):  
M. Carolina Orbay ◽  
Jorge L. Orbay
Keyword(s):  
Distal Radius ◽  
Patient Characteristics ◽  
Distal Radioulnar Joint ◽  
Distal Radius Fractures ◽  
Volar Plating ◽  
Radius Fractures ◽  
Fracture Patterns ◽  
Loss Of Reduction ◽  
Operative Fixation ◽  
Specific Fracture

AbstractGreater understanding of specific fracture patterns following distal radius fractures has arisen with the advent of volar plating. The volar marginal fragment (VMF) is a small peripheral piece of bone which is critical to carpal stability. Failure to achieve good fixation of the VMF can result in volar subluxation of the carpus and distal radioulnar joint instability. Due to its small, distal nature, this fragment can be easily missed and difficult to fix. Loss of reduction of the VMF following operative fixation presents specific challenges and surgical considerations dictated by patient characteristics and timing. Our goal of this review is to present a classification system for these failed VMFs which can help guide surgical treatment as well as expected outcomes.

The Fate of Pronator Quadratus Muscle after Volar Locking Plating of Unstable Distal Radius Fractures

2014 ◽  
Vol 27 (3) ◽  
pp. 191
Author(s):  
Chae-Hyun Lim ◽  
Heun-Guyn Jung ◽  
Ju-Yeong Heo ◽  
Young-Jae Jang ◽  
Yong-Soo Choi
Keyword(s):  
Distal Radius ◽  
Distal Radius Fractures ◽  
Radius Fractures ◽  
Pronator Quadratus ◽  
Pronator Quadratus Muscle

scholarly journals The Effect of Dorsal Angulation on Distal Radioulnar Joint Arthrokinematics Measured Using Intercartilage Distance

2018 ◽  
Vol 08 (01) ◽  
pp. 010-017
Author(s):  
Emily Lalone ◽  
Masao Nishiwaki ◽  
Ryan Willing ◽  
James Johnson ◽  
Graham King ◽  
...  
Keyword(s):  
Distal Radius ◽  
Contact Area ◽  
Three Dimensional ◽  
Distal Radioulnar Joint ◽  
Radioulnar Joint ◽  
Motion Data ◽  
Contact Patterns ◽  
Dorsal Angulation ◽  
Triangular Fibrocartilage

Background The effects of dorsal angulation deformity on in vitro distal radioulnar joint (DRUJ) contact patterns are not well understood. Purpose The purpose of this study was to utilize intercartilage distance to examine the effects of forearm rotation angle, distal radius deformity, and triangular fibrocartilage complex (TFCC) sectioning on DRUJ contact area and centroid position. Methods An adjustable implant permitted the creation of simulated intact state and dorsal angulation deformities of 10, 20, and 30 degrees. Three-dimensional cartilage models of the distal radius and ulna were created using computed tomography data. Using optically tracked motion data, the relative position of the cartilage models was rendered and used to measure DRUJ cartilage contact mechanics. Results DRUJ contact area was highest between 10 and 30 degrees of supination. TFCC sectioning caused a significant decrease in contact area with a mean reduction of 11 ± 7 mm2 between the TFCC intact and sectioned conditions across all variables. The position of the contact centroid moved volarly and proximally with supination for all variables. Deformity had a significant effect on the location of the contact centroid along the volar–dorsal plane. Conclusion Contact area in the DRUJ was maximal between 10 and 30 degrees of supination during the conditions tested. There was a significant effect of simulated TFCC rupture on contact area in the DRUJ, with a mean contact reduction of 11 ± 7 mm2 after sectioning. Increasing dorsal angulation caused the contact centroid to move progressively more volar in the sigmoid notch.

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