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Trauma of the wrist is often responsible for multiple ligament injuries. We wanted to know if the association of a luno-triquetral ligament lesion and a triangular fibrocartilage disc lesion has a poor prognosis. We reviewed 32 patients with a traumatic injury of the triangular ligament, with a mean age of 35 years, and 32 months of follow up. The functional scores used were the Modified Mayo Wrist score, the Quick DASH score, and the Herzberg score. Patients were classified according to the severity of luno-triquetral lesions, in conformity with the Geissler's classification. Ten patients had a healthy ligament, 11 a stable lesion stage 1 and 11 an unstable lesion stage 2, 3 or 4. The joint mobility averages were 59.5° in flexion, 64.2° in extension, a pronation of 71.3°, a supination of 74.1°, an ulnar inclination of 33.8° and a radial inclination of 16.8°. The Modified Mayo Wrist score average was 75/100, the Herzberg score average was 81.5/100 and the average of the Quick DASH 8/100. The patients were all very satisfied or satisfied with their intervention. There was no statistically significant difference between the three groups studied regarding mobility and functional scores. In this study, an associated luno-triquetral ligament injury does not seem to worsen the functional outcome after surgery, provided appropriate treatment had been performed. However, a larger patient sample is needed to verify these findings., (Copyright © 2012 Elsevier Masson SAS. All rights reserved.)