Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years
Objective. To compare the clinical and radiographic outcomes in patients of different ages who underwent the Dynesys stabilization. Methods. This retrospective study included 72 patients (mean age 61.4 years) with one- or two-level lumbar spinal stenosis who underwent laminectomy and the Dynesys (Zi...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Orthopedics |
| Online Access: | http://dx.doi.org/10.1155/2013/437570 |
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| author | Li-Yu Fay Jau-Ching Wu Tzu-Yun Tsai Tsung-Hsi Tu Ching-Lan Wu Wen-Cheng Huang Henrich Cheng |
| author_facet | Li-Yu Fay Jau-Ching Wu Tzu-Yun Tsai Tsung-Hsi Tu Ching-Lan Wu Wen-Cheng Huang Henrich Cheng |
| author_sort | Li-Yu Fay |
| collection | DOAJ |
| description | Objective. To compare the clinical and radiographic outcomes in patients of different ages who underwent the Dynesys stabilization. Methods. This retrospective study included 72 patients (mean age 61.4 years) with one- or two-level lumbar spinal stenosis who underwent laminectomy and the Dynesys (Zimmer Spine, Minneapolis) dynamic stabilization system. Thirty-seven patients were younger than 65-year old while the other 35 were older. Mean followup was 46.7 months. Pre- and postoperative radiographic and clinical evaluations were analyzed. Results. The mean calibrated disc signal (CDS) at the index level was significantly improved from 60.2±25.2 preoperatively to 66.9±26.0 postoperatively (P>0.001). Screw loosening occurred in 22.2% of patients and 5.1% of screws. The improvement in CDS at index level was seen to be significant in younger patients but not in older patients. Overall, the mean visual analogue scale (VAS) of back pain, VAS of leg pain, and the Oswestry disability index (ODI) scores improved significantly after operation. There were no significant differences in pre- and postoperative VAS and ODI and screw loosening rates between the younger and older patients. Conclusions. There is significant clinical improvement after laminectomy and dynamic stabilization for symptomatic lumbar spinal stenosis. Intervertebral disc rehydration was seen in younger patients. |
| format | Article |
| id | doaj-art-e8e38bc6c11e42eaa5e067794300d5f0 |
| institution | DOAJ |
| issn | 2090-3464 2090-3472 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Orthopedics |
| spelling | doaj-art-e8e38bc6c11e42eaa5e067794300d5f02025-08-20T03:21:09ZengWileyAdvances in Orthopedics2090-34642090-34722013-01-01201310.1155/2013/437570437570Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four YearsLi-Yu Fay0Jau-Ching Wu1Tzu-Yun Tsai2Tsung-Hsi Tu3Ching-Lan Wu4Wen-Cheng Huang5Henrich Cheng6Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, TaiwanDepartment of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, TaiwanDepartment of Ophthalmology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei 10002, TaiwanDepartment of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, TaiwanDepartment of Radiology, Taipei Veterans General Hospital, Taipei 11217, TaiwanDepartment of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, TaiwanDepartment of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, TaiwanObjective. To compare the clinical and radiographic outcomes in patients of different ages who underwent the Dynesys stabilization. Methods. This retrospective study included 72 patients (mean age 61.4 years) with one- or two-level lumbar spinal stenosis who underwent laminectomy and the Dynesys (Zimmer Spine, Minneapolis) dynamic stabilization system. Thirty-seven patients were younger than 65-year old while the other 35 were older. Mean followup was 46.7 months. Pre- and postoperative radiographic and clinical evaluations were analyzed. Results. The mean calibrated disc signal (CDS) at the index level was significantly improved from 60.2±25.2 preoperatively to 66.9±26.0 postoperatively (P>0.001). Screw loosening occurred in 22.2% of patients and 5.1% of screws. The improvement in CDS at index level was seen to be significant in younger patients but not in older patients. Overall, the mean visual analogue scale (VAS) of back pain, VAS of leg pain, and the Oswestry disability index (ODI) scores improved significantly after operation. There were no significant differences in pre- and postoperative VAS and ODI and screw loosening rates between the younger and older patients. Conclusions. There is significant clinical improvement after laminectomy and dynamic stabilization for symptomatic lumbar spinal stenosis. Intervertebral disc rehydration was seen in younger patients.http://dx.doi.org/10.1155/2013/437570 |
| spellingShingle | Li-Yu Fay Jau-Ching Wu Tzu-Yun Tsai Tsung-Hsi Tu Ching-Lan Wu Wen-Cheng Huang Henrich Cheng Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years Advances in Orthopedics |
| title | Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years |
| title_full | Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years |
| title_fullStr | Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years |
| title_full_unstemmed | Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years |
| title_short | Intervertebral Disc Rehydration after Lumbar Dynamic Stabilization: Magnetic Resonance Image Evaluation with a Mean Followup of Four Years |
| title_sort | intervertebral disc rehydration after lumbar dynamic stabilization magnetic resonance image evaluation with a mean followup of four years |
| url | http://dx.doi.org/10.1155/2013/437570 |
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