{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T09:07:33Z","timestamp":1779527253147,"version":"3.53.1"},"reference-count":78,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["FOC"],"published-print":{"date-parts":[[2016,1]]},"abstract":"<jats:sec>\n                    <jats:title>OBJECTIVE<\/jats:title>\n                    <jats:p>The Dynesys, a pedicle-based dynamic stabilization (PDS) system, was introduced to overcome the drawbacks of fusion procedures. Nevertheless, the theoretical advantages of PDS over fusion have not been clearly confirmed. The aim of this study was to compare clinical and radiological outcomes of patients who underwent PDS using the Dynesys system with those who underwent posterior lumbar interbody fusion (PLIF).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS<\/jats:title>\n                    <jats:p>\n                      The authors searched PubMed, Embase, Web of Science, and the Cochrane Database. Studies that reported outcomes of patients who underwent PDS or PLIF for the treatment of degenerative lumbar spinal disease were included. The primary efficacy end points were perioperative outcomes. The secondary efficacy end points were changes in the Oswestry Disability Index (ODI) and back and leg pain visual analog scale (VAS) scores and in range of motion (ROM) at the treated and adjacent segments. A meta-analysis was performed to calculate weighted mean differences (WMDs), 95% confidence intervals, Q statistics, and I\n                      <jats:sup>2<\/jats:sup>\n                      values. Forest plots were constructed for each analysis group.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>Of the 274 retrieved articles, 7 (which involved 506 participants [Dynesys, 250; PLIF, 256]) met the inclusion criteria. The Dynesys group showed a competitive advantage in mean surgery duration (20.73 minutes, 95% CI 8.76\u201332.70 minutes), blood loss (81.87 ml, 95% CI 45.11\u2013118.63 ml), and length of hospital stay (1.32 days, 95% CI 0.23\u20132.41 days). Both the Dynesys and PLIF groups experienced improved ODI and VAS scores after 2 years of follow-up. Regarding the ODI and VAS scores, no statistically significant difference was noted according to surgical procedure (ODI: WMD 0.12, 95% CI \u22123.48 to 3.72; back pain VAS score: WMD \u22120.15; 95% CI \u22120.56 to 0.26; leg pain VAS score: WMD \u22120.07; 95% CI \u22120.47 to 0.32). The mean ROM at the adjacent segment increased in both groups, and there was no substantial difference between them (WMD 1.13; 95% CI \u22120.33 to 2.59). Although the United States is the biggest market for Dynesys, no eligible study from the United States was found, and 4 of 8 enrolled studies were performed in China. The results must be interpreted with caution because of publication bias. During Dynesys implantation, surgeons have to decide the length of the spacer and cord pretension. These values are debatable and can vary according to the surgeon's experience and the patient's condition. Differences between the surgical procedures were not considered in this study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS<\/jats:title>\n                    <jats:p>Fusion still remains the method of choice for advanced degeneration and gross instability. However, spinal degenerative disease with or without Grade I spondylolisthesis, particularly in patients who require a quicker recovery, will likely constitute the main indication for PDS using the Dynesys system.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/2015.10.focus15426","type":"journal-article","created":{"date-parts":[[2016,1,1]],"date-time":"2016-01-01T03:36:37Z","timestamp":1451619397000},"page":"E7","source":"Crossref","is-referenced-by-count":43,"title":["Dynamic stabilization using the Dynesys system versus posterior lumbar interbody fusion for the treatment of degenerative lumbar spinal disease: a clinical and radiological outcomes-based meta-analysis"],"prefix":"10.3171","volume":"40","author":[{"given":"Chang-Hyun","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Ilsan Paik Hospital, Inje University College of Medicine, Goyang;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tae-Ahn","family":"Jahng","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seongnam;"},{"name":"Seoul National University College of Medicine, Seoul;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seung-Jae","family":"Hyun","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seongnam;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chi Heon","family":"Kim","sequence":"additional","affiliation":[{"name":"Seoul National University College of Medicine, Seoul;"},{"name":"Department of Neurosurgery and"},{"name":"Clinical Research Institute, Seoul National University Hospital, Seoul;"},{"name":"Neuroscience Research Institute, Seoul National University Medical Research Center, Seoul; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sung-Bae","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ki-Jeong","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seongnam;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chun Kee","family":"Chung","sequence":"additional","affiliation":[{"name":"Seoul National University College of Medicine, Seoul;"},{"name":"Department of Neurosurgery and"},{"name":"Clinical Research Institute, Seoul National University Hospital, Seoul;"},{"name":"Neuroscience Research Institute, Seoul National University Medical Research Center, Seoul; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyun-Jib","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seongnam;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soo-Eon","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seongnam;"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1-focus15426","series-title":"Adv Orthop","first-page":"218385","article-title":"Role of Dynesys as pedicle-based nonfusion stabilization for degenerative disc disorders","volume":"2012","author":"Anand","year":"2012"},{"key":"b2-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"685","article-title":"The Dynesys lumbar spinal stabilization system: a preliminary report on positional magnetic resonance imaging findings","volume":"32","author":"Beastall","year":"2007"},{"key":"b3-focus15426","series-title":"Br J Math Stat Psychol","first-page":"257","article-title":"Synthesizing standardized mean-change measures","volume":"41","author":"Becker","year":"1988"},{"key":"b4-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"1287","article-title":"Adjacent segment mobility after rigid and semirigid instrumentation of the lumbar spine","volume":"34","author":"Cakir","year":"2009"},{"key":"b5-focus15426","series-title":"Evid Based Spine Care J","first-page":"33","article-title":"Dynamic stabilization versus fusion for treatment of degenerative spine conditions","volume":"2","author":"Chou","year":"2011"},{"key":"b6-focus15426","series-title":"Arch Orthop Trauma Surg","first-page":"285","article-title":"How does spinal canal decompression and dorsal stabilization affect segmental mobility? A biomechanical study","volume":"130","author":"Delank","year":"2010"},{"key":"b7-focus15426","series-title":"Adv Orthop","first-page":"437570","article-title":"Intervertebral disc rehydration after lumbar dynamic stabilization: magnetic resonance image evaluation with a mean followup of four years","volume":"2013","author":"Fay","year":"2013"},{"key":"b8-focus15426","series-title":"J Spinal Disord Tech","first-page":"236","article-title":"Radiostereometric analysis of postoperative motion after application of Dynesys dynamic posterior stabilization system for treatment of degenerative spondylolisthesis","volume":"23","author":"Fayyazi","year":"2010"},{"key":"b9-focus15426","series-title":"J Orthop Surg","first-page":"87","article-title":"Comparison between posterior dynamic stabilization and posterior lumbar interbody fusion in the treatment of degenerative disc disease: a prospective cohort study","volume":"10","author":"Fei","year":"2015"},{"key":"b10-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"324","article-title":"Clinical experience with the Dynesys semirigid fixation system for the lumbar spine: surgical and patient-oriented outcome in 50 cases after an average of 2 years","volume":"30","author":"Grob","year":"2005"},{"key":"b11-focus15426","series-title":"Acta Orthop Belg","first-page":"97","article-title":"Dynesys dynamic stabilization: less good outcome than lumbar fusion at 4-year follow-up","volume":"79","author":"Haddad","year":"2013"},{"key":"b12-focus15426","series-title":"Spine J","first-page":"85","article-title":"Comparison of the biomechanical effect of pedicle-based dynamic stabilization: a study using finite element analysis","volume":"13","author":"Jahng","year":"2013"},{"key":"b13-focus15426","series-title":"Orthopedics","first-page":"309","article-title":"Comparison of posterior dynamic and posterior rigid transpedicular stabilization with fusion to treat degenerative spondylolisthesis","volume":"33","author":"Kaner","year":"2010"},{"key":"b14-focus15426","series-title":"SAS J","first-page":"99","article-title":"Clinical outcomes of degenerative lumbar spinal stenosis treated with lumbar decompression and the Cosmic \u201csemirigid\u201d posterior system","volume":"4","author":"Kaner","year":"2010"},{"key":"b15-focus15426","series-title":"J Spinal Disord Tech","first-page":"60","article-title":"Comparisons of outcomes after single or multilevel dynamic stabilization: effects on adjacent segment","volume":"24","author":"Kim","year":"2011"},{"issue":"6","key":"b16-focus15426","series-title":"Neurosurg Focus","first-page":"E10","article-title":"Screw loosening in the Dynesys stabilization system: radiographic evidence and effect on outcomes","volume":"28","author":"Ko","year":"2010"},{"key":"b17-focus15426","series-title":"J Neurosurg Spine","first-page":"585","article-title":"Decompression and nonfusion dynamic stabilization for spinal stenosis with degenerative lumbar scoliosis: Clinical article","volume":"21","author":"Lee","year":"2014"},{"key":"b18-focus15426","series-title":"J Korean Neurosurg Soc","first-page":"221","article-title":"Clinical experience of the dynamic stabilization system for the degenerative spine disease","volume":"43","author":"Lee","year":"2008"},{"key":"b19-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"E691","article-title":"Spinopelvic alignment after interspinous soft stabilization with a tension band system in grade 1 degenerative lumbar spondylolisthesis","volume":"35","author":"Lee","year":"2010"},{"key":"b20-focus15426","series-title":"Eur Spine J","first-page":"1850","article-title":"Effect of the cord pretension of the Dynesys dynamic stabilisation system on the biomechanics of the lumbar spine: a finite element analysis","volume":"20","author":"Liu","year":"2011"},{"key":"b21-focus15426","series-title":"J Korean Neurosurg Soc","first-page":"174","article-title":"Back muscle changes after pedicle based dynamic stabilization","volume":"53","author":"Moon","year":"2013"},{"key":"b22-focus15426","series-title":"Br J Math Stat Psychol","first-page":"17","article-title":"Distribution of the standardized mean change effect size for meta-analysis on repeated measures","volume":"53","author":"Morris","year":"2000"},{"key":"b23-focus15426","series-title":"Psychol Methods","first-page":"105","article-title":"Combining effect size estimates in meta-analysis with repeated measures and independent-groups designs","volume":"7","author":"Morris","year":"2002"},{"key":"b24-focus15426","series-title":"Eur Spine J","first-page":"913","article-title":"Biomechanical characterization of the three-dimensional kinematic behaviour of the Dynesys dynamic stabilization system: an in vitro study","volume":"15","author":"Niosi","year":"2006"},{"issue":"16 Suppl","key":"b25-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"S68","article-title":"Dynamic stabilization in the surgical management of painful lumbar spinal disorders","volume":"30","author":"Nockels","year":"2005"},{"key":"b26-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"E636","article-title":"Minimum four-year follow-up of spinal stenosis with degenerative spondylolisthesis treated with decompression and dynamic stabilization","volume":"33","author":"Schaeren","year":"2008"},{"key":"b27-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"442","article-title":"Dynamic stabilization in addition to decompression for lumbar spinal stenosis with degenerative spondylolisthesis","volume":"31","author":"Schnake","year":"2006"},{"key":"b28-focus15426","series-title":"Oper Tech Orthop","first-page":"235","article-title":"A review of dynamic stabilization in the lumbar spine","volume":"21","author":"Schroeder","year":"2011"},{"key":"b29-focus15426","series-title":"Oper Orthop Traumatol","first-page":"545","article-title":"[Dynamic posterior stabilization with the pedicle screw system DYNESYS\u00ae.]","volume":"22","author":"Schwarzenbach","year":"2010"},{"key":"b30-focus15426","series-title":"Adv Orthop","first-page":"424268","article-title":"Pedicle screw-based posterior dynamic stabilization: literature review","volume":"2012","author":"Sengupta","year":"2012"},{"issue":"Suppl 2","key":"b31-focus15426","series-title":"Eur Spine J","first-page":"S170","article-title":"The dynamic neutralization system for the spine: a multi-center study of a novel non-fusion system","volume":"11","author":"Stoll","year":"2002"},{"key":"b32-focus15426","series-title":"Formosan J Surg","first-page":"116","article-title":"Posterior dynamic stabilization system (Dynesys) with interbody fusion for treating two-segment lumbar degenerative disc disease","volume":"46","author":"Tsai","year":"2013"},{"issue":"1","key":"b33-focus15426","series-title":"Neurosurg Focus","first-page":"E8","article-title":"Clinical outcomes of the Dynesys dynamic neutralization system: 1-year preliminary results","volume":"22","author":"Welch","year":"2007"},{"issue":"4","key":"b34-focus15426","series-title":"Neurosurg Focus","first-page":"E9","article-title":"Pedicle screw loosening in dynamic stabilization: incidence, risk, and outcome in 126 patients","volume":"31","author":"Wu","year":"2011"},{"key":"b35-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"E66","article-title":"Dynamic neutralization of the lumbar spine after microsurgical decompression in acquired lumbar spinal stenosis and segmental instability","volume":"33","author":"W\u00fcrgler-Hauri","year":"2008"},{"key":"b36-focus15426","series-title":"Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi","first-page":"140","article-title":"[Comparative study of dynamic neutralization system and posterior lumbar interbody fusion in treating lumbar degenerative disease.]","volume":"27","author":"Yang","year":"2013"},{"key":"b37-focus15426","series-title":"Acad J Second Mil Med Univ","first-page":"1145","article-title":"[Dynesys dynamic fixation and lumbar spinal fusion for treatment of lumbar degenerative disease: a clinical comparative study.]","volume":"35","author":"Yang","year":"2014"},{"key":"b38-focus15426","series-title":"Indian J Orthop","first-page":"574","article-title":"Short term outcome of posterior dynamic stabilization system in degenerative lumbar diseases","volume":"48","author":"Yang","year":"2014"},{"key":"b39-focus15426","series-title":"Acta Orthop Belg","first-page":"230","article-title":"Comparison of Dynesys posterior stabilization and posterior lumbar interbody fusion for spinal stenosis L4L5","volume":"78","author":"Yu","year":"2012"},{"key":"b1-focus15426","series-title":"Adv Orthop","first-page":"218385","article-title":"Role of Dynesys as pedicle-based nonfusion stabilization for degenerative disc disorders","volume":"2012","author":"Anand","year":"2012"},{"key":"b2-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"685","article-title":"The Dynesys lumbar spinal stabilization system: a preliminary report on positional magnetic resonance imaging findings","volume":"32","author":"Beastall","year":"2007"},{"key":"b3-focus15426","series-title":"Br J Math Stat Psychol","first-page":"257","article-title":"Synthesizing standardized mean-change measures","volume":"41","author":"Becker","year":"1988"},{"key":"b4-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"1287","article-title":"Adjacent segment mobility after rigid and semirigid instrumentation of the lumbar spine","volume":"34","author":"Cakir","year":"2009"},{"key":"b5-focus15426","series-title":"Evid Based Spine Care J","first-page":"33","article-title":"Dynamic stabilization versus fusion for treatment of degenerative spine conditions","volume":"2","author":"Chou","year":"2011"},{"key":"b6-focus15426","series-title":"Arch Orthop Trauma Surg","first-page":"285","article-title":"How does spinal canal decompression and dorsal stabilization affect segmental mobility? A biomechanical study","volume":"130","author":"Delank","year":"2010"},{"key":"b7-focus15426","series-title":"Adv Orthop","first-page":"437570","article-title":"Intervertebral disc rehydration after lumbar dynamic stabilization: magnetic resonance image evaluation with a mean followup of four years","volume":"2013","author":"Fay","year":"2013"},{"key":"b8-focus15426","series-title":"J Spinal Disord Tech","first-page":"236","article-title":"Radiostereometric analysis of postoperative motion after application of Dynesys dynamic posterior stabilization system for treatment of degenerative spondylolisthesis","volume":"23","author":"Fayyazi","year":"2010"},{"key":"b9-focus15426","series-title":"J Orthop Surg","first-page":"87","article-title":"Comparison between posterior dynamic stabilization and posterior lumbar interbody fusion in the treatment of degenerative disc disease: a prospective cohort study","volume":"10","author":"Fei","year":"2015"},{"key":"b10-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"324","article-title":"Clinical experience with the Dynesys semirigid fixation system for the lumbar spine: surgical and patient-oriented outcome in 50 cases after an average of 2 years","volume":"30","author":"Grob","year":"2005"},{"key":"b11-focus15426","series-title":"Acta Orthop Belg","first-page":"97","article-title":"Dynesys dynamic stabilization: less good outcome than lumbar fusion at 4-year follow-up","volume":"79","author":"Haddad","year":"2013"},{"key":"b12-focus15426","series-title":"Spine J","first-page":"85","article-title":"Comparison of the biomechanical effect of pedicle-based dynamic stabilization: a study using finite element analysis","volume":"13","author":"Jahng","year":"2013"},{"key":"b13-focus15426","series-title":"Orthopedics","first-page":"309","article-title":"Comparison of posterior dynamic and posterior rigid transpedicular stabilization with fusion to treat degenerative spondylolisthesis","volume":"33","author":"Kaner","year":"2010"},{"key":"b14-focus15426","series-title":"SAS J","first-page":"99","article-title":"Clinical outcomes of degenerative lumbar spinal stenosis treated with lumbar decompression and the Cosmic \u201csemirigid\u201d posterior system","volume":"4","author":"Kaner","year":"2010"},{"key":"b15-focus15426","series-title":"J Spinal Disord Tech","first-page":"60","article-title":"Comparisons of outcomes after single or multilevel dynamic stabilization: effects on adjacent segment","volume":"24","author":"Kim","year":"2011"},{"issue":"6","key":"b16-focus15426","series-title":"Neurosurg Focus","first-page":"E10","article-title":"Screw loosening in the Dynesys stabilization system: radiographic evidence and effect on outcomes","volume":"28","author":"Ko","year":"2010"},{"key":"b17-focus15426","series-title":"J Neurosurg Spine","first-page":"585","article-title":"Decompression and nonfusion dynamic stabilization for spinal stenosis with degenerative lumbar scoliosis: Clinical article","volume":"21","author":"Lee","year":"2014"},{"key":"b18-focus15426","series-title":"J Korean Neurosurg Soc","first-page":"221","article-title":"Clinical experience of the dynamic stabilization system for the degenerative spine disease","volume":"43","author":"Lee","year":"2008"},{"key":"b19-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"E691","article-title":"Spinopelvic alignment after interspinous soft stabilization with a tension band system in grade 1 degenerative lumbar spondylolisthesis","volume":"35","author":"Lee","year":"2010"},{"key":"b20-focus15426","series-title":"Eur Spine J","first-page":"1850","article-title":"Effect of the cord pretension of the Dynesys dynamic stabilisation system on the biomechanics of the lumbar spine: a finite element analysis","volume":"20","author":"Liu","year":"2011"},{"key":"b21-focus15426","series-title":"J Korean Neurosurg Soc","first-page":"174","article-title":"Back muscle changes after pedicle based dynamic stabilization","volume":"53","author":"Moon","year":"2013"},{"key":"b22-focus15426","series-title":"Br J Math Stat Psychol","first-page":"17","article-title":"Distribution of the standardized mean change effect size for meta-analysis on repeated measures","volume":"53","author":"Morris","year":"2000"},{"key":"b23-focus15426","series-title":"Psychol Methods","first-page":"105","article-title":"Combining effect size estimates in meta-analysis with repeated measures and independent-groups designs","volume":"7","author":"Morris","year":"2002"},{"key":"b24-focus15426","series-title":"Eur Spine J","first-page":"913","article-title":"Biomechanical characterization of the three-dimensional kinematic behaviour of the Dynesys dynamic stabilization system: an in vitro study","volume":"15","author":"Niosi","year":"2006"},{"issue":"16 Suppl","key":"b25-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"S68","article-title":"Dynamic stabilization in the surgical management of painful lumbar spinal disorders","volume":"30","author":"Nockels","year":"2005"},{"key":"b26-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"E636","article-title":"Minimum four-year follow-up of spinal stenosis with degenerative spondylolisthesis treated with decompression and dynamic stabilization","volume":"33","author":"Schaeren","year":"2008"},{"key":"b27-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"442","article-title":"Dynamic stabilization in addition to decompression for lumbar spinal stenosis with degenerative spondylolisthesis","volume":"31","author":"Schnake","year":"2006"},{"key":"b28-focus15426","series-title":"Oper Tech Orthop","first-page":"235","article-title":"A review of dynamic stabilization in the lumbar spine","volume":"21","author":"Schroeder","year":"2011"},{"key":"b29-focus15426","series-title":"Oper Orthop Traumatol","first-page":"545","article-title":"[Dynamic posterior stabilization with the pedicle screw system DYNESYS\u00ae.]","volume":"22","author":"Schwarzenbach","year":"2010"},{"key":"b30-focus15426","series-title":"Adv Orthop","first-page":"424268","article-title":"Pedicle screw-based posterior dynamic stabilization: literature review","volume":"2012","author":"Sengupta","year":"2012"},{"issue":"Suppl 2","key":"b31-focus15426","series-title":"Eur Spine J","first-page":"S170","article-title":"The dynamic neutralization system for the spine: a multi-center study of a novel non-fusion system","volume":"11","author":"Stoll","year":"2002"},{"key":"b32-focus15426","series-title":"Formosan J Surg","first-page":"116","article-title":"Posterior dynamic stabilization system (Dynesys) with interbody fusion for treating two-segment lumbar degenerative disc disease","volume":"46","author":"Tsai","year":"2013"},{"issue":"1","key":"b33-focus15426","series-title":"Neurosurg Focus","first-page":"E8","article-title":"Clinical outcomes of the Dynesys dynamic neutralization system: 1-year preliminary results","volume":"22","author":"Welch","year":"2007"},{"issue":"4","key":"b34-focus15426","series-title":"Neurosurg Focus","first-page":"E9","article-title":"Pedicle screw loosening in dynamic stabilization: incidence, risk, and outcome in 126 patients","volume":"31","author":"Wu","year":"2011"},{"key":"b35-focus15426","series-title":"Spine (Phila Pa 1976)","first-page":"E66","article-title":"Dynamic neutralization of the lumbar spine after microsurgical decompression in acquired lumbar spinal stenosis and segmental instability","volume":"33","author":"W\u00fcrgler-Hauri","year":"2008"},{"key":"b36-focus15426","series-title":"Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi","first-page":"140","article-title":"[Comparative study of dynamic neutralization system and posterior lumbar interbody fusion in treating lumbar degenerative disease.]","volume":"27","author":"Yang","year":"2013"},{"key":"b37-focus15426","series-title":"Acad J Second Mil Med Univ","first-page":"1145","article-title":"[Dynesys dynamic fixation and lumbar spinal fusion for treatment of lumbar degenerative disease: a clinical comparative study.]","volume":"35","author":"Yang","year":"2014"},{"key":"b38-focus15426","series-title":"Indian J Orthop","first-page":"574","article-title":"Short term outcome of posterior dynamic stabilization system in degenerative lumbar diseases","volume":"48","author":"Yang","year":"2014"},{"key":"b39-focus15426","series-title":"Acta Orthop Belg","first-page":"230","article-title":"Comparison of Dynesys posterior stabilization and posterior lumbar interbody fusion for spinal stenosis L4L5","volume":"78","author":"Yu","year":"2012"}],"container-title":["Neurosurgical 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