Distal radioulnar instability is an independent worsening factor in distal radial fractures

Treatment of injuries to the ulnar side of the wrist occurring with distal radial fractures

We still do not know how to best treat the DRUJ condition that was recognized 200 years ago by Abraham Colles and later addressed in Frykman's classic thesis. To improve the outcome, we must recognize the differences be-tween osteoporotic and other fractures and understand the importance of ligament injuries,especially in patients under the osteoporotic age. However, our current problem is that neither the initial ligament injury nor the posttraumatic laxity is detectable with radiographic methods,which creates future challenges regarding diagnosis and treatment. We therefore have to critically analyze each fracture in each patient and be aware of the complexity of the entire injury to the wrist.

Predicting the outcome of distal radius fractures

There are myriad factors that affect patient satisfaction following a distal radius fracture, including anatomic alignment, age, motion, pain,and hand dominance to name a few. The seeming contradictions in the literature serve to illustrate that individual outcomes are not entirely predict-able because of the different functional demands,expectations, and pain tolerance for each patient. Elderly populations may tolerate greater degrees of residual deformity because of a more sedentary lifestyle. Unrecognized intracarpal pathology may account for poor results despite acceptable radiographic alignment. Possessing a knowledge of the predictive factors that affect adversely the functional outcome, however, does allow the surgeon to manage complications proactively to maximize the potential for an acceptable end result.

Results of acute arthroscopically repaired triangular fibrocartilage complex injuries associated with intra-articular distal radius fractures

PURPOSE

This study reviews the results of acute repair of peripheral ulnar-sided triangular fibrocartilage complex (TFCC) detachment associated with intra-articular distal radius fractures.

TYPE OF STUDY

Two-year follow-up of patients who had undergone acute TFCC repair.

METHODS

Fifty-six patients underwent arthroscopically assisted treatment of intra-articular distal radius fractures using external fixation and adjunctive percutaneous pinning between 1994 and 1998. Thirteen patients with an acute, complete tear of the ulnar attachment of the TFCC were treated using arthroscopic repair of the TFCC in addition to stabilization of the radius fracture. All patients were evaluated at a mean of 24 months (range, 17 to 35 months) with a physical examination, wrist radiographs, and a Disability of Arm, Shoulder, and Hand (DASH) module outcome assessment questionnaire.

RESULTS

Average wrist flexion, extension, pronation, and supination were 67.3, 61.8, 79.1, and 86.8, respectively. The average grip strength was 78% of the uninjured side. The results of the Gartland and Werley grading system were good to excellent in 12 patients and fair in 1 patient. The DASH outcome scores revealed a mean functional score of 13 and a mean athletic score of 12. None of the patients reported ulnar-sided pain at follow-up.

CONCLUSIONS

Arthroscopically assisted TFCC repair in conjunction with distal radius fixation resulted in a high degree of patient satisfaction and good to excellent clinical outcomes.

Ulnar styloid fractures associated with distal radius fractures: incidence and implications for distal radioulnar joint instability

Ulnar-sided injuries of the wrist have received more attention recently for their potential negative impact on the outcome of distal radius fractures. Radiographs and medical records were retrospectively reviewed for 166 distal radius fractures treated during a 1-year interval. Distal radius fractures were classified according to the AO system, and accompanying ulnar styloid fractures were evaluated for both size and displacement. Each distal radius fracture was also evaluated for radiographic and clinical evidence of distal radioulnar joint instability. The distribution of ulnar styloid fractures was not random; greater than one third involved the base. All distal radius fractures complicated by distal radioulnar joint instability were accompanied by an ulnar styloid fracture. A fracture at the ulnar styloid's base and significant displacement of an ulnar styloid fracture were found to increase the risk of distal radioulnar joint instability.

The radioulnar joint in distal radial fractures

We searched The Cochrane Library and Medline regarding the radioulnar joint in distal radial fractures and found no randomized or controlled studies. This review presents the descriptive literature by summarizing accepted views and controversies. There is only weak support for the commonly accepted treatments. Current research has shown that distal radial fractures are often associated with ligament injuries not seen on radiographs. These injuries can lead to laxity of the DRU-joint and subsequent worse outcome, which indicates that we must have a complete diagnosis including ligament injuries if we want to understand better the fracture and its sequelae. Randomized studies should be done before advocating surgical treatment of these unforeseen injuries.

Ulnar-styloid nonunion and partial rupture of extensor carpi ulnaris tendon: two case reports and review of the literature

Two unusual cases of symptomatic partial rupture of the extensor carpi ulnaris tendon associated with ulnar-styloid nonunion are described. Intraoperative findings suggested that the jagged surface of the distal ulna was the cause of flaying. In one case, debridement of the frayed extensor carpi ulnaris tendon and fixation of the ulnar styloid were effective for the relief of symptoms. But after the same procedure in another case, osteosynthesis of the ulnar-styloid could not be attained and tenodesis of the extensor carpi ulnaris tendon to the ulnar head was needed. Partial rupture of the ECU tendon should be taken into account in the differential diagnosis of a patient with ulnar wrist pain after ulnar-styloid fracture.

Intrafocal pinning of distal radius fractures: a simplified approach

Distal radius fractures are not often treated by plastic surgeons. At the authors' institution, plastic surgery manages half of all traumas below the elbow, including distal radius and forearm fractures. This opportunity gives the residents a unique perspective for comprehensive training in treating upper extremity injuries. Because a distal radius fracture is the most common fracture of the upper extremity, the authors describe the use of intrafocal pinning as a simple and effective approach in the treatment of extra-articular distal radius fractures (Colles' fractures). They conducted a prospective study of 18 patients with Colles' fractures treated sequentially at their institution from 1998 to 2001 using this technique. They measured ulnar variance and palmar tilt of the distal radius at the time of injury, after closed reduction, immediately postoperatively, and 11 weeks postoperatively. Acceptable distal radius reduction aims to achieve at least neutral ulnar variance and 0-deg palmar tilt. Compared with closed reduction, they achieved superior anatomic reduction with intrafocal pinning: ulnar variance, +2.6 mm vs. -1.4 mm; palmar tilt, -13.3 deg vs. +2.1 deg). These results were stable at the 11-week follow-up. Intrafocal pinning is a valuable tool in the management of Colles' fractures. It is simple to perform and to teach, and it produces results that are superior to closed reduction alone.

[Unstable fracture of the distal radius and its treatment: comparison of three techniques: external fixation, intramedullary pinning and AO plates]

This retrospective study compares 94 distal radius fractures. Sixty one women (median age 66) and 33 men (median age 42) were reviewed clinically and radiologically by a surgeon not involved in treatment. Fractures were classified into three AO groups. Standard X-rays were used for radiological evaluation. Fractures of the distal ulna were evaluated separately. Chi-square tests, Wilcoxon, Mann-Whitney and Fisher's tests were used for statistical evaluation. Women presented mainly "A" type fractures. They were treated by intramedullary pinning. Forty two fractures were grafted, using autogenous bone for young patients and bone substitute for the elderly. Twelve scapholunate dissociations were recorded, all but one were detected in women, 50 years of age or more. Four were painfree, two presented climatic pain and six claimed pain during effort; none had snapping. Radio-ulnar laxity was similar with or without styloid fractures. External fixator and autogenous grafts appeared the most efficient technique for maintaining radial length. Ulnar head fractures were related to a significant higher incidence of sympathetic dystrophy with reduced prono-supination, a correlation not previously noted to your knowledge. This suggests that radius and ulnar head fracture should be classified independently. The amount of pain was not related to classification, internal fixation or gender.

Wrist arthroscopy in distal radial fractures using a modified horizontal technique

Wrist arthroscopy has today become an important adjunct in the management of displaced intra-articular distal radial fractures, with reduction of joint incongruencies as well as detection and treatment of associated soft-tissue injuries. However, standard upright arthroscopy makes it difficult to combine arthroscopic-assisted reduction with additional treatment of the often comminuted, extra-articular fracture component. This article describes a modified arthroscopic technique in which the arm is blocked in pronation with the traction horizontally over a handle on a normal hand table, without any other changes in the arthroscopy itself. The author has operated on 17 patients using this horizontal technique in combination with arthroscopic-assisted reductions, closed and open osteosynthesis, and soft-tissue procedures. The horizontal technique allows complete treatment of comminuted, unstable distal radial fractures, intra-articular and extra-articular reduction, and bone grafting, as well as assessment and treatment of associated soft-tissue injuries.