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Survivorship analysis of DKS instrumentation in the treatment of spondylolisthesis.

Authors
  • Chen, W J
  • Niu, C C
  • Chen, L H
  • Shih, C H
Type
Published Article
Journal
Clinical orthopaedics and related research
Publication Date
Jun 01, 1997
Issue
339
Pages
113–120
Identifiers
PMID: 9186209
Source
Medline
License
Unknown

Abstract

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.

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