title: Surgical results of dynamic nonfusion stabilization with the Segmental Spinal Correction System for degenerative lumbar spinal diseases with instability: Minimum 2-year follow-up.
abstract: BACKGROUND
  When spinal fusion is applied to degenerative lumbar spinal disease with instability, adjacent segment disorder will be an issue in the future. However, decompression alone could cause recurrence of spinal canal stenosis because of increased instability on operated segments and lead to revision surgery. Covering the disadvantages of both procedures, we applied nonfusion stabilization with the Segmental Spinal Correction System (Ulrich Medical, Ulm, Germany) and decompression.
  
  
  METHODS
  The surgical results of 52 patients (35 men and 17 women) with a minimum 2-year follow-up were analyzed: 10 patients with lumbar spinal canal stenosis, 15 with lumbar canal stenosis with disc herniation, 20 with degenerative spondylolisthesis, 6 with disc herniation, and 1 with lumbar discopathy.
  
  
  RESULTS
  The Japanese Orthopaedic Association score was improved, from 14.4 ± 5.3 to 25.5 ± 2.8. The improvement rate was 76%. Range of motion of the operated segments was significantly decreased, from 9.6° ± 4.2° to 2.0° ± 1.8°. Only 1 patient had adjacent segment disease that required revision surgery. There was only 1 screw breakage, but the patient was asymptomatic.
  
  
  CONCLUSIONS
  Over a minimum 2-year follow-up, the results of nonfusion stabilization with the Segmental Spinal Correction System for unstable degenerative lumbar disease were good. It is necessary to follow up the cases with a focus on adjacent segment disorders in the future.
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: Hideki
authors: H
authors: Ohta
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: Yoshiyuki
authors: Y
authors: Matsumoto
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: Yuichirou
authors: Y
authors: Morishita
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: Tsubasa
authors: T
authors: Sakai
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: George
authors: G
authors: Huang
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: Hirotaka
authors: H
authors: Kida
authors: Oita Orthopedic Hospital, Oita-shi, Japan.
authors: Yoshiharu
authors: Y
authors: Takemitsu
keywords: Dynamic stabilization; Instability; Lumbar spinal canal stenosis