[Lumbar segmental spondylodesis--isolated ventral or combined dorsoventral? A comparison of results].

Indications for intercorporal fusion are progressive spondylolisthesis in children and adolescents, painful segmental instability in adults (spondylolisthesis, post-discectomy-syndrome, failed-back-syndrome). From 1980-86 152 isolated anterior intercorporal fusions had been realized, and in 1987/88 we carried out 79 combined anterior-posterior fusions. The rate of pseudarthrosis has been 25% with isolated anterior fusion and on the contrary 9% with combined fusion. With combined fusion the rate of complications did not increase, but the objective and subjective results became better. The postoperative period became more convenient, the stay in hospital and the consolidation of fusion were shorter. The reposition of spondylolisthesis was durable and the spine channel was accessible. We consider the instrumented fusion to be a complex reconstructive operation with high chances of success.