[Reoperation in failure of surgical treatment of sciatica].

39 patients have been reoperated on for failed lumbar discs. In this series enhanced MRI, enhanced CT scan and disco-CT have been used. These modern imaging means allowed a better assessment for the causes of failure; thus, only in 4 patients was a pure periradicular fibrosis disclosed. The results of reoperations are significantly better than those of a previous series of the same institution, where these imaging devices could not been used. 76% of the patients benefited from reoperation.