title: Reduction-fixation spinal system in spondylolisthesis.
abstract: Posterior transpedicular instrumentation with short segmental fixation represents a current trend in surgery for unstable spinal problems, such as spondylolisthesis. A reduction-fixation spinal system with 5.75- to 6.25-mm diameter pedicle screws of variable angles and an 8-mm diameter rod can achieve a rather rigid, short-segment fixation and satisfactory reduction of spondylolisthetic deformities. In clinical applications, 84% of 85 patients with spinal instability had good-to-excellent results for back pain, 88% for sciatica, and 86% for claudication; 91% achieved solid posterolateral fusion from the roentgenographic studies. This reduction-fixation system achieved a reduction of 71% +/- 5.3% of slipping width in this population. Posterior lumbar interbody fusion is mandatory for effective and lasting reduction. Complications from reduction fixation including pedicle-screw loosening (12%), pedicle screw breakage (7%), adjacent instability (7%), and nerve root injury (2%).
authors.affiliation: Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan, Republic of China.
authors.forename: C C
authors.initials: CC
authors.lastname: Niu
authors.forename: W J
authors.initials: WJ
authors.lastname: Chen
authors.forename: L H
authors.initials: LH
authors.lastname: Chen
authors.forename: C H
authors.initials: CH
authors.lastname: Shih
mesh_terms: D000328:Adult; D000368:Aged; D001863:Bone Screws; D004868:Equipment Failure; D005260:Female; D006801:Humans; D007796:Laminectomy; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D012447:Sacrum; D013123:Spinal Fusion / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D013168:Spondylolisthesis / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome