Survivorship analysis of DKS instrumentation in the treatment of spondylolisthesis

Wen Jer Chen*, Chi Chien Niu, Lih Huei Chen, Chun Hsiung Shih

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

20 Scopus citations


This retrospective study analyzed the survivorship of DKS instrumentation and the clinical outcomes in 185 patients with spondylolisthesis. These patients were treated with Zielke DKS instrumentation for a mean followup period of 3.5 years. Eight (4.3%) patients had late removal of implants, 25 (14%) had rod breakage, three (1.7%) had screw breakage, and 16 (8.7%) had nut loosening. The survivor rate of DKS instrumentation was 96% within 3 months after operation, 80% at 2 years, and 61% at 5 years after surgery. One hundred sixty-three (88%) patients had solid posterolateral fusion, and 167 (90%) patients had good to excellent results. Adjacent instability developed in 18 (9.7%) patients. Although Zielke DKS instrumentation has a smaller rod and relatively insecure locking system between the rod and screw, it is an effective implant for the treatment of spondylolisthesis.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalClinical Orthopaedics and Related Research
StatePublished - 06 1997


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