Distal Radioulnar Joint Research Articles

Distal Radius Fracture with Dislocation of the Radioulnar Joint.

The authors report on the case of a 30-year-old male who sustained a wrist injury following a motorcycle accident. Emergency department evaluation revealed a left open distal radius fracture with distal radioulnar joint dislocation. The patient underwent surgical fixation to restore full mobility of his wrist.

A Case Report On The Effect Of Early Mobilization In The Rehabilitation Of An Acrobat Post-Open Triangular Fibrocartilage Complex Repair

The Triangular Fibrocartilage Complex (TFCC) is one of the more vital structures in the wrist. The TFCC functions as a stabilizer of the distal radioulnar joint and a conduit in the transmission of load in the upper extremity. Its integrity is important to allow the dynamic movement of the hand and wrist as well as in weight bearing. The TFCC can be subjected to excessive stresses, especially in elite performing athletes such as an acrobat, that can lead to its rupture.
 Partial or complete rupture of the TFCC of an elite athlete would benefit most from an open surgical repair. Surgery is then followed by hand therapy. However, due to the complexity of the TFCC, there is currently no gold standard in the rehabilitation of the TFCC. Albeit the globally practiced treatment post-surgery involves prolonged immobilization in a cast or a Muenster Splint that can range between 3 weeks and 8 weeks beforehand therapy can commence.
 The length of immobilization and time spent in hand therapy to recover range of motion, function, and strength can consume more than four months. This is a time that a performing acrobat may not have.
 This paper presents the effect of immediate hand therapy and early mobilization of the wrist of a professional acrobat who had an open surgical repair of a partial rupture of the TFCC and the Lunotriquetral ligament of the wrist.

The Distal Oblique Bundle in the Distal Forearm: From Anatomical Features to Clinical Implementation.

Background and objective The distal oblique bundle (DOB) is nowadays recognized as thethickest component of the distal interosseous membrane (DIOM). It is neither thought to be a clear-cut ligament, and nor does it follow the typical configuration of the rest of the DIOM. It is not always present and some studies have raised disputes about its prevalence and a few anatomical features. In this study, we aimed to provide data on the prevalence and anatomical features of the DOB, which are of great importance at this early stage of research into the topic. Our findings have been correlated with current knowledge and are expected to contribute to clinical implementation. Materials and methods Twenty-eightfresh-frozen forearms were utilized for measurements. Specifically, mean length, width, distance from the middle of the bundle's insertion to the ulna to the tip of the styloid process of the ulna, as well as the distance from the midpoint of its insertion to the radius to the tip of the radiuses' styloid process were calculated. The prevalence was described with a cutoff thickness point of 0.5 mm. Early results based on three cases of DOB reconstruction with the "Riggenbach" technique due to distal radioulnar joint (DRUJ) instability were documented. Results Eleven DOBs were reported out of the 28 specimens, suggesting a prevalence of 39.3%. The mean thickness was 0.88 mm (range: 0.6-1.3 mm), the mean width was 5.22 mm (range: 2.2-8.4 mm), and the mean length was 25.68 mm (range: 22.7-29.2 mm). Proximally, the mean distance from the bundle's ulnar insertion to the tip of the styloid process of the ulna was 51.02 mm (range: 45.5-55.6 mm) while distally, the mean distance from the bundle's insertion to the radius to the tip of the styloid process of the radius was 34.5 mm (range: 31.3-37.7 mm). After a follow-up of at least six months, improvement was evident in all measured areas in the three patients who underwent surgery. Additionally, they reported satisfaction and accomplishment of their preoperative goals. Conclusions Discrepancies in measurements in some anatomic features between studies are probably due to variations in specimen types, measurement methods, and sites. Efforts must continue to be made on a more extensive scale and in a more standardized manner for more factual results and conclusions. "Reconstruction-recreation" or "original construction-creation" procedures yield promising results in a fast, simple, and less invasive manner than traditional methods of DRUJ stabilization.

Distal oblique bundle influence on distal radioulnar joint stability: a biomechanical study

Chronic instability of the distal radioulnar joint (DRUJ) presents a highly disabling condition. Several surgical techniques have been reported for its treatment. These involve reconstruction of the distal oblique bundle (DOB) of the interosseous membrane (IOM) of the forearm. The aim of this study was to examine whether surgical reconstruction of the DOB is necessary to restore DRUJ stability following trauma with DOB disruption and to compare two restoration techniques utilizing a tendon or suture-button graft. Stability in supination and pronation was assessed by means of maximum torque and force in twenty forearms. Test cycles were performed with the DOB/IOM in an intact condition, with the DOB or distal IOM transected, and following surgical reconstruction of the DOB with either tendon graft or suture-button system. In pronation, the relative change in maximum axial force was significantly lower in samples with a transected DOB in comparison to samples without a preexisting DOB. No statistically significant differences were observed between forearms including DOB reconstruction and specimens in the intact and transected state. Neither were there statistically significant differences concerning the two surgical techniques. From a biomechanical perspective, surgical DOB reconstruction is hence not indicated in cases of isolated DOB rupture.

Volar distal radioulnar joint dislocation: A case report and literature review

Volar distal radioulnar joint dislocation: A case report and literature review

Standardized reduction and palmar plating of dorsally displaced distal radius fractures for safe and atraumatic reconstruction of the anatomy of the radius

Standardization of palmar plate osteosynthesis in order to consequently achieve physiologic anatomy of the distal radius end. Unstable dorsally displaced distal radius fractures or fractures that should be treated functionally. Severe intraarticular joint depression that cannot be reduced with either apalmar or arthroscopic assisted approach. Patient in supine position with the forearm supinated on arm table. Radiopalmar incision along the radial border of the flexor carpi radialis tendon. Detachment of the pronator quadratus muscle from radial to ulnar. Gross reduction with eventual correction of adorsal or radial shift. Placement of the angular stable plate and preliminary fixation with anonangular stable cortical screw in the long hole at the radius shaft. Fluoroscopic control of axial alignment in the anteroposterior view and of correct distal position of the plate in the lateral view under reduction condition. Placement of one or two angular stable screws at the shaft. Under subtle reduction with flexion, ulnar deviation and axial traction placement of two K‑wires via the holes at the distal edge of the plate. These wires mostly keep reduction maintained while reduction maneuver can be paused. Fluoroscopic control in two planes. Replacement of the wires by distal angular stable screws with the help of the wires as an orientation. In case of insufficient reduction, reduction maneuver can be repeated while the first angular stable screw is locked. Final fluoroscopic control in two planes and ulnar deviation, eventually also in tangential view and clinical testing for stability of the distal radioulnar joint. Wound closure only by skin suture. Application of asterile dressing and apalmar cast. Arm consequently in upright position and active and complete movement of fingers. Palmar below-elbow cast for 2weeks, then movement of wrist without exertion. After regular radiographic control 4-5weeks postoperatively, increase of axial load to normal and, if needed, physiotherapy. Clinical control for irritation of tendons by plate or screws after 1year and eventual plate removal.

Extensor Carpi Ulnaris “Turn Around” Ligamentoplasty For Distal Radioulnar Joint Instability

Extensor Carpi Ulnaris “Turn Around” Ligamentoplasty For Distal Radioulnar Joint Instability

Predictive factors of distal radioulnar joint instability after surgical treatment of distal radius fractures.

Distal radioulnar joint (DRUJ) instability is a common postoperative complication of distal radius fractures, seriously impacting patients' quality of life. This study investigated its possible influencing factors to determine prognosis and to guide treatment better. We retrospectively included a series of patients with distal radius fractures that underwent volar locking plate fixation. Basic patient information and imaging parameters were collected. The incidence of DRUJ instability during follow-up was recorded, and factors associated with DRUJ instability were determined using univariate analysis and multifactorial logistic regression analysis. A total of 159 patients were enrolled in this study. At 6 months of follow-up, 54 patients (34.0%) had DRUJ instability, and multivariate analysis showed coronal plane displacement (OR, 1.665; 95% CI, 1.091-2.541), fracture classification (OR, 0.679; 95% CI, 0.468-0.984) and DRUJ interval (OR, 1.960; 95% CI, 1.276-3.010) were associated with DRUJ instability after volar locking plate. DRUJ interval, coronal plane displacement, and fracture classification are associated with DRUJ instability during follow-up. Therefore, preoperative risk communication and intraoperative attention to recovering relevant imaging parameters are necessary for these patients.

Arthrex Mini Tightrope Fixation for Chronic Distal Radioulnar Joint Instability.

Chronic distal radioulnar joint (DRUJ) instability is a complex clinical condition that is difficult to treat. Currently, there is no gold standard treatment. We present a novel technique using Arthrex Mini Tightrope for DRUJ stabilization. In this case series, a 1.6 mm K-wire was passed transversely through the distal ulna and radius. The Mini Tightrope was inserted into the end of the K-wire and pulled through the bone tunnels. Appropriate tension was achieved to stabilize the joint according to individual laxity comparable to the contralateral side. Five patients (3 males and 2 females) comprised this pilot series, with a mean age of 27.1 years. All sustained a traumatic injury at an average of 12.4 months before surgery (range: 5 to 32 mo). In addition, 3 patients had central triangular fibrocartilage complex tears treated with arthroscopy at the time of Mini Tightrope placement. While one patient was lost to follow-up after 7 weeks postoperative due to incarceration, 4 patients demonstrated coronal and sagittal stability in the context of DRUJ motion and a satisfactory range of motion. The mean time for the return to work for the two patients who were laborers or normal activity postoperatively was 5.2 weeks (range: 1 to 16.4 wk). Unrestricted activity was generally allowed 8 weeks postoperatively but varied by patient. The same 4 patients underwent hardware removal at an average of 31 weeks (range: 15 to 44 wk). Although this is only a pilot series, this suggests that temporary Mini Tightrope stabilization of the DRUJ may be a viable solution while upholding the benefits of minimally invasive surgery.

Case report of Galeazzi like fracture associated with fracture of the scaphoid, Rolando fracture and avulsion of the inserting site of the extensor carpi ulnaris

Introduction: Galeazzi fracture is a fracture of the distal third or medial third of the ulnar shaft associated with distal radioulnar joint dislocation. These lesions can be accompanied with others lesions. Case presentation: 21 years old male victim of motorcycle slide with a Galeazzi like fracture accompanied with a fracture of the scaphoid, first and fifth metacarpal and which was treated surgically. Discussion: Galeazzi fracture present the third of the fractures of the radius, the mechanism combines axial loading with excessive rotation. It’s fracture of necessity nonsurgical treatment yields a poor result. Conclusion: for our patient the mechanism suggests an axial loading with excessive pronation trained by the handlebar of the motorcycle.

Reliability and Validity Analysis of the Distal Radioulnar Joint Ballottement Test

Triangular fibrocartilage complex injuries can cause distal radioulnar joint (DRUJ) instability, which can be evaluated clinically with the DRUJ ballottement test. However, the reliability and validity of the test are unclear. This study aimed to analyze the reliability and validity of the test using a tracking device on healthy participants and patients with triangular fibrocartilage complex injuries. In this cross-sectional study, three orthopedic hand surgeons performed the DRUJ ballottement test using a technique of holding the carpal bones to the radius on 25 healthy participants (50 hands; 10 men and 15 women; mean age, 33 years; range, 20-51 years) and eight patients with triangular fibrocartilage complex injuries (16 hands; six men and two women; mean age, 43 years; range, 27-59 years). We used a three-dimensional electromagnetic tracking device to quantify the movement of the DRUJ and verify the reliability and validity of the test. The intrarater and interrater intraclass correlation coefficients for DRUJ movement were 0.77 and 0.61, respectively, and the kappa coefficient for grading of DRUJ instability was 0.79. The correlation coefficient between DRUJ movement measured using the tracking device and instability judged clinically was 0.77. A comparison of healthy participants and the patients showed significantly greater DRUJ movement in the patients. The test showed substantial intrarater and interrater reliability for assessing DRUJ movement and instability. The significant positive correlation between DRUJ movement and instability indicates the concurrent validity of the test. Moreover, the test showed discriminative validity in identifying mild or moderate DRUJ instability. The DRUJ ballottement test using the holding technique has a relatively high diagnostic accuracy and can be used to assess DRUJ instability.

Ulnar Head Fracture with Volar Dislocation of the Distal Radioulnar Joint: A Case Series and Systematic Review

AbstractDislocations of the distal radioulnar joint associated with a fracture of the distal ulna articular surface without an associated radial fracture are extremely rare.We present a case of a fracture of the distal ulna with an associated dislocation of the distal radioulnar joint, where the articular head fragment was displaced anterior to the sigmoid notch.We also present the results of a formal systematic review of these injuries which confirmed this is the first such injury described, although there is a very similar fracture pattern described in the literature with dorsal dislocation.We describe the mechanism of injury and hypothesize about the etiology of the fracture pattern and suggest that it represents the end of a spectrum that also includes the isolated dislocations and those associated with an ulna styloid fracture.

Arthroscopic Examination of the Triangular Fibrocartilage Complex in Galeazzi Injuries: Revisiting a Complex Injury

AbstractGaleazzi fracture-dislocations result from severe trauma and can lead to loss of function of the wrist and forearm if not treated appropriately. To avoid such disasters, meticulous surgical management of the injury is necessary. The current literature talks about symptomatic distal radioulnar joint injuries in Galeazzi fracture-dislocations and the various approaches to managing instability. However, unfortunately, there is a dearth of data on the true incidence of injury to the triangular fibrocartilage in the backdrop of the severity of the mechanism of Galeazzi fractures and the damage it may cause as direct inspection of the triangular fibrocartilage complex is not done routinely as a part of management of such cases. We conducted a retrospective review of six consecutive patients with Galeazzi fracture-dislocations. Wrist arthroscopy was performed in these cases, which revealed complex tears of the triangular fibrocartilage complex involving large segments of the ligament and always involving the dorsal periphery. All tears followed the same pattern of disruption of the attachments of two sides of the triangular fibrocartilage complex. We believe our findings will pave the path to further prospective studies in understanding the degree of damage in the triangular fibrocartilage in such devastating injuries and the need for meticulous arthroscopic repair.

Morphometry of sigmoid notch: A novel method of shape assessment for clinical practice

PurposeUsing a novel technique, we assess and describe the distal radioulnar joint (DRUJ) anatomy with reference to sigmoid notch shapes. The purpose of this study was to develop a non-invasive, fast, reliable and reproducible technique for analysing the shapes of sigmoid notch on CT scans. Methods40 cadaveric wrist specimens exposing the sigmoid notch and 100 normal adult wrist CT scans with end on axial sections showing the sigmoid notch outline were obtained. The shape of the sigmoid notch was assessed on both using the geometric construction method. ResultsOf the 40 cadaveric specimens, 42 % were C-shaped, 33 % were flat,17 % were Ski sloped, and 8 % were S-shaped.Of the 100 wrist CT scans, 48 % were C-shaped sigmoid notch, 17 % were flat, 15 % were ski-sloped, and 20 % were S-shaped shapes. ConclusionsOur sample population had a higher prevalence of C-shaped sigmoids in both cadaveric and CT-based studies. It is considered the most stable shape because of its increased depth. The DRUJ morphology in our sample population can be inferred to have a stable configuration. Clinical relevanceThe relationships and measurements demonstrated in this study can be a guide when considering ligament reconstruction for DRUJ instability, managing complex fractures involving the DRUJ and in decision-making for notchplasty, osteotomy and arthroplasty of DRUJ.

DRUJ Capsular Release for Forearm Rotational Limitation: Surgical Technique and Case Series.

Forearm stiffness can be caused by distal radioulnar joint (DRUJ) capsular contractures, which can occur after trauma such as a distal radius fracture. In this setting, a DRUJ capsular release may help improve forearm rotation, but the long-term functional outcomes remain unknown. The purpose of this case series is to investigate the short-term improvement in total pronosupination arc range of motion and long-term patient-reported outcomes (PROs) after DRUJ capsular release. We performed a retrospective review of consecutive patients who underwent DRUJ capsular release. Range of motion prior to surgery and at final short-term follow-up was collected and analyzed with a Wilcoxon signed-rank test. Patient-reported outcomes including QuickDASH and Patient-Reported Outcomes Measurement Information System (PROMIS) Upper Extremity (UE) scores were obtained as medians with interquartile range (IQR), while patient satisfaction was measured on a 4-point Likert scale. Five patients met the inclusion criteria with a median short-term follow-up of 5.5 (IQR: 4.3-10.3) months. The median preoperative supination was 25° (IQR: 0°-35°), and the median postoperative supination was 50° (IQR: 40°-60°; P = .03). The median preoperative pronation was 45° (IQR: 10°-60°), and the median postoperative pronation was 70° (IQR: 60°-80°; P = .04). After the long-term median follow-up of 10.9 (IQR 9.7-11.2) years, all the patients were satisfied or very satisfied with the results of the surgery. The median QuickDASH score was 13.6 (IQR: 9.1-20.5), and the median PROMIS UE score was 46.5 (IQR: 43.8-47.7). Distal radioulnar joint capsular release can improve pronation and supination in patients with posttraumatic forearm stiffness and is associated with high long-term patient satisfaction.

Radiographic Comparison of Forearm Symmetry in Healthy Individuals and its Importance in the Diagnosis of Longitudinal Radioulnar Dissociation.

Longitudinal radioulnar dissociation (LRD) is an injury often missed upon initial presentation. A recent study examined a radiographic screening test in cadavers that showed increased interosseous distance when the interosseous ligament (IOL) was divided. For this test to be clinically useful, it is necessary for uninjured forearms to have similar interosseous spaces. The purpose of this study was to determine the typical differences between right and left interosseous spaces of healthy individuals. Anterior-posterior x-rays of bilateral forearms in maximum supination of 28 surgical residents with no history of injury were obtained. These images were uploaded into a picture archiving and communication system and then digitized. The length of the radius was measured (Xr). The maximum interosseous distance (Dmax) between the radius and ulna as well as the interosseous distance at a location 0.3 Xr from the distal radioulnar joint was measured. The right and left arm distances were compared. Also, an outlier analysis was used to evaluate forearm rotational asymmetry between right and left arms. The outlier analysis revealed two sets of forearm x-rays were rotationally different compared to the rest of the group due to asymmetric arm positioning; these data were excluded from the analysis. The average difference in Dmax was 1.7 mm (standard deviation [SD] 1.5) between right and left arms, and this was found at a position of 0.28 Xr on average. The difference in interosseous distance measured at a fixed location 0.3 Xr was 1.6 mm (SD 1.5). No significant difference was found between the paired right and left arms for Dmax or at 0.3 Xr. There does not appear to be any significant difference between the maximum interosseous distance of right and left arms in healthy individuals. Therefore, analyzing bilateral forearm x-rays may be a simple LRD screening test. Understanding the degree of normal variation in the forearm bone spacing might inform evaluation of abnormal forearm bone alignment resulting from LRD.

Foveal triangular fibrocartilage complex pathology: a potentially under-recognized injury.

The primary aim of the present study was to present a case series of 24 patients with foveal triangular fibrocartilage complex (TFCC) injuries that were treated with arthroscopically assisted TFCC foveal repair. In total, 19 patients had a stable distal radioulnar joint (DRUJ) and five had an unstable DRUJ. Despite this, all patients were found to have a foveal tear upon DRUJ arthroscopy. Magnetic resonance imaging (MRI) scans detected only eight out of 23 patients with foveal injuries. In addition to their foveal injury, 19 of the 24 patients had additional pathology that required treatment. At a mean follow-up of 18 months, there was a statistically significant improvement in pain, range of motion, grip strength and functional scores. In this study, we demonstrate that having a stable DRUJ upon clinical examination and normal MRI findings does not rule out foveal TFCC injury and a high index of clinical suspicion is needed when managing patients with ulnar sided wrist pain.Level of evidence: IV.

Comparative Analysis of Treatment Outcomes: Modified Ulnar Gutter Slab vs. Sugar Tong Slab for Distal Radioulnar Joint Instability Following Triangular Fibrocartilage Complex Repair.

The standard treatment for distal radioulnar joint (DRUJ) instability involves repairing the triangular fibrocartilage complex (TFCC) and immobilizing the joint with a sugar tong slab, but this can cause elbow stiffness. To address this, a modified ulnar gutter slab was designed to enhance elbow mobility during immobilization. A prospective randomized controlled trial was conducted on 23 DRUJ instability patients who underwent arthroscopic TFCC repair. Two post-operative splinting techniques were compared: the modified ulnar gutter slab and the sugar tong slab. The assessment included the Disabilities of Arm, Shoulder, and Hand (DASH) score; elbow, forearm, and wrist range of motion (ROM); post-operative DRUJ stability; and complications. DASH scores at 4 and 6 weeks were not significantly different. However, the modified ulnar gutter slab improved elbow extension range of motion at 4 weeks (extension lag: 20.0 vs. 6.5 in the sugar tong group) (p = 0.011). Post-operative DRUJ stability was comparable between the two groups. Notably, one patient in the sugar tong slab group experienced complex regional pain syndrome (CRPS). The modified ulnar gutter slab offers a post-operative alternative after TFCC repair. It effectively immobilizes forearm and wrist motion while enhancing elbow mobility, potentially reducing post-operative elbow stiffness.

Current Concepts: Corrective Osteotomy for Extra-Articular Deformity Following a Distal Radius Fracture.

Fracture malunion alters wrist and distal radioulnar joint (DRUJ) biomechanics, resulting in incongruence and instability of the DRUJ. Selected patients with painful functional limitation and significant deformity of the radius, but without advanced degenerative joint disease, may benefit from corrective distal radial osteotomy. Non-union and complications arising from metalwork are the most common reasons for reoperation. Surgeons should have a good understanding of risks and complications in order to fully inform their patients and manage expectations. This article reviews the biomechanical effects of radial malunion and the current concepts for treatment. Distal radial osteotomy is suitable for symptomatic patients with angular radial deformity and shortening. Evidence supports a volar approach without bone grafts for modest corrections. Bone grafts or synthetic bone substitutes are appropriate for larger corrections. Functional improvements are reported regardless of technique. Despite a high complication rate, patient satisfaction with the corrective radial osteotomy is high.

Mini-invasive Indirect Distraction in the Treatment of Neglected DRUJ Dislocations—A Novel Surgical Technique

Abstract Introduction: This study presents mini-invasive indirect distraction in the treatment of neglected distal radioulnar joint (DRUJ) dislocations as a novel surgical technique. Pure DRUJ dislocation is a rare injury caused by over rotation of the forearm. It is often undiagnosed in an acute setting. There is no consensus on the treatment of neglected dislocations. Materials and methods: We present a group of six patients with neglected pure DRUJ dislocation, treated by a single surgeon between 2012 and 2019. Results: Closed reduction was impossible in six of six patients. The indirect distraction allowed the reduction of the DRUJ in all cases with final stable DRUJ. Forearm rotation returned to normal in four patients, one patient had 50%, and another patient had 60% of the range of forearm. Mean pain dropped from 7 to 0.8 on visual analog scale. At the 2-year follow-up, the mean Disabilities of the Arm, Shoulder, and Hand score was 8 (0–37.5), and minor degenerative X-ray changes were observed in four patients. Level of evidence IV