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Ulnar shortening after failed arthroscopic treatment of triangular fibrocartilage complex tears.

Ulnar shortening osteotomy was performed in 11 wrists with ulnar abutment syndrome, after failed arthroscopic surgery on the TFCC (ten debridements, one repair). A delayed union was present in three, a non-union occurred in two, of whom one needed a revision and grafting procedure. According to the Mayo wrist score, only four had an acceptable outcome. Patient's satisfaction was higher: seven were satisfied, four were not. The postoperative wrist pain score was good in ten patients. Overall outcome was not very successful. Problems related to the procedure could be avoided by adapting the technique (oblique osteotomy, palmar placement of the plate, and compression devices). The key statement remains however to us; ulnar sided wrist pain thought to be caused by an ulnar abutment is not necessarily resolved by decompressing the ulnocarpal joint.

Adolescent↗

Outcome study of arthroscopic suturing of ulnar avulsions of the triangular fibrocartilage complex of the wrist.

INTRODUCTION: Ulnar wrist pain due to a TFCC lesion is frequent. Based on studies of the vascularity, ulnar avulsion can be sutured. Arthroscopic techniques have been designed but results are sparsely published. MATERIALS AND METHODS: This is a retrospective study of 35 patients with an ulnar avulsion of the TFCC. All the patients were treated with an originally designed arthroscopical technique. The evaluation was focused on the subjective and functional ouome. A pain score and a DASH score were used. RESULTS: The general impression was positive with a mean DASH score of 15 points. Two-thirds of the patients had a DASH score totaling less than 20. Twenty-nine patients had a good outcome, six were fair or poor. CONCLUSION: Arthroscopical repair of the TFCC is a reliable and useful technique.

Adolescent↗

[TFCC (Triangular Fibrocartilage Complex) lesions. Diagnosis and therapy].

Lesions of the TFCC may have degenerative or post-traumatic causes. Distal radioulnar joint as well as the ulnocarpal joint can be affected. Patients present with ulnar-sided wrist pain especially in forearm rotation. Therapy depends on the degree of lesions and additional pathology. Wrist arthroscopy offers a certain diagnostic tool. In addition, adequate therapy can be realized. After failed arthroscopic therapy, ulnar shortening osteotomy reduces ulnar load significantly.

Arthroscopy↗

Histologic anatomy of the triangular fibrocartilage.

Histologic examination of the TFC reveals parallel, longitudinally oriented collagen fibers peripherally, while the more central articular disc is made up of interweaving obliquely oriented sheets of collagen fibers. This suggests a peripheral region experiencing tensile loads between the region of origin from the radius and the area of insertion into the ulna. The fiber orientation in the central region is more compatible with a structure experiencing multidirectional stresses. The articular disc origin from the radius is reinforced by collagen bundles projecting out from the radius for 1 to 2 mm. A large number of traumatic tears are oriented parallel to the radial origin of the TFC and located approximately 1 to 2 mm from the origin site. This corresponds to the junction of the short, radially oriented fibers and the remainder of the articular disc. The inner 80% of the articular disc is avascular, as is its radial attachment. Traumatic tears in this region would have a low healing potential unless some method for introducing additional vascularity was undertaken, such as reattachment through drill holes in the radius, allowing neovascularization of this otherwise avascular region.

Cartilage, Articular↗

Arthroscopic treatment of triangular fibrocartilage tears.

Lesions of the TFCC are more frequently implicated as a cause of ulnar-sided wrist pain. Accurate diagnosis of TFCC pathology must be based on a thorough history and physical examination. Imaging modalities of particular use include plain radiographs, triple compartment arthrography, and MR imaging. The most sensitive and accurate diagnosis of the extent as well as the clinical significance of intra-articular pathology on the ulnar side of the wrist is by means of the arthroscope. With the advent of smaller and more elaborate arthroscopic instrumentation, the ability to perform arthroscopic surgery on the TFCC has dramatically increased over the past decade. The present arthroscopic treatment of traumatic central and radial lesions consists of debridement of unstable flaps, whereas dorsal and ulnar-sided lesions can be directly repaired. Centrally located degenerative perforations can be debrided in conjunction with an arthroscopic wafer procedure on the distal ulna.

Arthroscopy↗

Arthroscopic treatment of degenerative tears of the triangular fibrocartilage.

The arthroscope permits treatment of degenerative tears of the TFC and associated lesions. It lends itself to the assessment and treatment of both "primary" and "secondary" ulnar impaction syndromes. Ulnocarpal, radiocarpal, and midcarpal synovitis can be excised, as can partial tears of the lunatotriquetral interosseous ligament. The primum movens of the ulnar impaction syndrome, a long ulna, can be shortened arthroscopically if the positive ulnar variance is less than 4 mm and no distal radioulnar joint instability or degenerative changes are noted. Although an arthroscopic "wafer" procedure is possible, more clinical studies are needed to allow an accurate assessment of its efficacy.

Adult↗

Evaluation of selective wrist arthrography of contralateral asymptomatic wrists for symmetric ligamentous defects.

OBJECTIVE: The objective of this investigation was to study the role of selective wrist arthrography of the asymptomatic wrists of patients with unilateral wrist pain and the efficacy of three-compartment and selective-compartment injections of contrast medium into the asymptomatic wrist in demonstrating symmetric and asymmetric intercarpal ligament and triangular fibrocartilage communicating defects. SUBJECTS AND METHODS: Wrist arthrography with bilateral three-compartment injections was performed for 62 patients with unilateral wrist pain. The numbers of bilateral intercarpal ligament and triangular fibrocartilage communicating defects were recorded. The results obtained with three-compartment injections in each wrist of these patients were compared with those obtained with single-compartment injections. RESULTS: Bilateral three-compartment injections identified 110 communicating defects (59 in the symptomatic and 51 in the asymptomatic wrists). Midcarpal injections showed all 36 scapholunate and lunatotriquetral ligament defects that were also shown by three-compartment injections in asymptomatic wrists. However, only 26 (72%) of these 36 ligament defects were shown by radiocarpal injections. No single-compartment injection showed all triangular fibrocartilage defects that were shown by three-compartment injections. Ten bilateral symmetric triangular fibrocartilage communicating defects were shown by three-compartment injections. All 10 triangular fibrocartilage communicating defects in asymptomatic wrists were shown by radiocarpal injections. However, only five of the 10 triangular fibrocartilage communicating defects in asymptomatic wrists were shown by injection of the distal radioulnar joints. CONCLUSION: Selective midcarpal injection of an asymptomatic wrist showed all matching defects in that wrist when only intercarpal ligament defects were found in the symptomatic wrist. Similarly, selective radiocarpal injection of an asymptomatic wrist showed all matching defects of the triangular fibrocartilage in that wrist. In either situation, routine injection of all three compartments of the asymptomatic wrist should not be necessary.

Adolescent↗