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- W3203846854 abstract "Background: The treatment of idiopathic scoliosis has shifted to pedicle screw fixation. This study was conducted to assess the intermediate-term effectiveness of posterior correction with low-density all-pedicle-screw constructs. Objective: To review the intermediate-term outcome of low-density posterior-only pedicle screw constructs for a 5-year minimum follow-up. Material and Method: The retrospective review included 30 patients who underwent posterior correction with low-density all-pedicle-screw constructs during 2004-2008. The radiographic measurements at pre-operation, immediate post-operation, 2-years post-operation, and 5-years post-operation were evaluated. Results: Four males and 26 females were included in this study. The mean follow-up was 6.1 years (range: 5.0-9.0). The average age at operation was 14.2±2.2 years. The preoperative Cobb angle of the major curve was 55.3±12.8°, which was significantly corrected to 15.6±7.8° immediately post-operation, and significantly increased to 17.2±8.2° and to 18.5±8.7° at 2-years post-operation and 5-years post-operation, respectively. The major curve correction loss rate was 25.2%. In the normal thoracic kyphosis group (range: 10o-40°), the preoperative thoracic kyphosis angle was 28.0±12.3°, which was non-significantly decreased to 24.1±9.1°, 25.8±8.1°, and 25.8±8.5° at immediately post-operation, at 2-years post-operation, and 5-years post-operation, respectively. Preoperative lumbar lordosis non-significantly decreased from 42.7±13.0° to 39.5±10.1°, 40.5±9.1° and 41.2±9.4° at immediately post-operation, 2-years post-operation and 5-years post-operation, respectively. Screw density was 0.9 screw per level or 51%. Conclusion: This study reviewed the 5-year post-operative outcome of posterior correction with low-density all-pedicle-screw constructs. The Cobb angle in coronal alignment correction was improved, but was significantly lost at 2- and 5-years post-operation. Thoracic kyphosis and lumbar lordosis were improved but did not significantly change at 2- and 5-years post-operation. Keywords: Adolescent Idiopathic scoliosis, pedicle screws , posterior spinal fusion all-pedicle-screw constructs, low screw density (Spinal Fusion)" @default.
- W3203846854 created "2021-10-11" @default.
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- W3203846854 date "2019-10-01" @default.
- W3203846854 modified "2023-09-28" @default.
- W3203846854 title "Operative Results of Adolescent Idiopathic Scoliosis Correction Using Low-Density Instrumentation with 5-Year Follow-up" @default.
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