✓ The operative technique and results of radical removal and early mobilization in lumbar disc surgery are presented. The operation involves decompression of the nerve root ventrally and dorsally and radical removal of disc material. The importance of immediate mobilization and an exercise regime without braces is stressed. Spondylolisthesis with sciatica is treated as a simple disc. The results were good to excellent in 96% of the patients, with a return to work in 2 to 4 weeks. The recurrence rate in 779 cases over 10 years has averaged 2.7%.