[Posterior lumbar fusion using spongious-metal pins in lumbar instability and spondylolisthesis].

A new technique of posterior lumbar interbody fusion (PLIF) using a cast cancellous metal blade is presented. A new shape of the metal implant which insures an immediate lumbar fusion is designed by the authors. This technique is used in 8 patients with spondylolisthesis and in 11 patients with lumbar instability. In all patients good and immediate fusion is achieved as well as satisfactory clinical effect. The operative technique is presented and advantages of this technique are discussed.