{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T06:35:04Z","timestamp":1789799704798,"version":"4.0.1"},"reference-count":38,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2018,9]]},"abstract":"<jats:sec><jats:title>OBJECTIVE<\/jats:title><jats:p>Pedicle screw\u2013based dynamic stabilization has been an alternative to conventional lumbar fusion for the surgical management of low-grade spondylolisthesis. However, the true effect of dynamic stabilization on adjacent-segment degeneration (ASD) remains undetermined. Authors of this study aimed to investigate the incidence of ASD and to compare the clinical outcomes of dynamic stabilization and minimally invasive transforaminal lumbar interbody fusion (MI-TLIF).<\/jats:p><\/jats:sec><jats:sec><jats:title>METHODS<\/jats:title><jats:p>The records of consecutive patients with Meyerding grade I degenerative spondylolisthesis who had undergone surgical management at L4\u20135 in the period from 2007 to 2014 were retrospectively reviewed. Patients were divided into two groups according to the surgery performed: Dynesys dynamic stabilization (DDS) group and MI-TLIF group. Pre- and postoperative radiological evaluations, including radiography, CT, and MRI studies, were compared. Adjacent discs were evaluated using 4 radiological parameters: instability (antero- or retrolisthesis), disc degeneration (Pfirrmann classification), endplate degeneration (Modic classification), and range of motion (ROM). Clinical outcomes, measured with the visual analog scale (VAS) for back and leg pain, the Oswestry Disability Index (ODI), and the Japanese Orthopaedic Association (JOA) scores, were also compared.<\/jats:p><\/jats:sec><jats:sec><jats:title>RESULTS<\/jats:title><jats:p>A total of 79 patients with L4\u20135 degenerative spondylolisthesis were included in the analysis. During a mean follow-up of 35.2 months (range 24\u201389 months), there were 56 patients in the DDS group and 23 in the MI-TLIF group. Prior to surgery, both groups were very similar in demographic, radiological, and clinical data. Postoperation, both groups had similarly significant improvement in clinical outcomes (VAS, ODI, and JOA scores) at each time point of evaluation. There was a lower chance of disc degeneration (Pfirrmann classification) of the adjacent discs in the DDS group than in the MI-TLIF group (17% vs 37%, p = 0.01). However, the DDS and MI-TLIF groups had similar rates of instability (15.2% vs 17.4%, respectively, p = 0.92) and endplate degeneration (1.8% vs 6.5%, p = 0.30) at the cranial (L3\u20134) and caudal (L5\u2013S1) adjacent levels after surgery. The mean ROM in the cranial and caudal levels was also similar in the two groups. None of the patients required secondary surgery for any ASD (defined by radiological criteria).<\/jats:p><\/jats:sec><jats:sec><jats:title>CONCLUSIONS<\/jats:title><jats:p>The clinical improvements after DDS were similar to those following MI-TLIF for L4\u20135 Meyerding grade I degenerative spondylolisthesis at 3 years postoperation. According to radiological evaluations, there was a lower chance of disc degeneration in the adjacent levels of the patients who had undergone DDS. However, other radiological signs of ASD, including instability, endplate degeneration, and ROM, were similar between the two groups. Although none of the patients in the present series required secondary surgery, a longer follow-up and a larger number of patients would be necessary to corroborate the protective effect of DDS against ASD.<\/jats:p><\/jats:sec>","DOI":"10.3171\/2018.1.spine17993","type":"journal-article","created":{"date-parts":[[2018,6,1]],"date-time":"2018-06-01T14:01:37Z","timestamp":1527861697000},"page":"250-258","source":"Crossref","is-referenced-by-count":38,"title":["Radiological adjacent-segment degeneration in L4\u20135 spondylolisthesis: comparison between dynamic stabilization and minimally invasive transforaminal lumbar interbody fusion"],"prefix":"10.3171","volume":"29","author":[{"given":"Chao-Hung","family":"Kuo","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital;"},{"name":"Department of Neurological Surgery, University of Washington, Seattle, Washington;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen-Cheng","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital;"},{"name":"School of Medicine, National Yang-Ming University, Taipei, Taiwan;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jau-Ching","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital;"},{"name":"School of Medicine, National Yang-Ming University, Taipei, Taiwan;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsung-Hsi","family":"Tu","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital;"},{"name":"School of Medicine, National Yang-Ming University, Taipei, Taiwan;"},{"name":"Molecular Medicine Program, Taiwan International Graduate Program (TIGP), Academia Sinica;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li-Yu","family":"Fay","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital;"},{"name":"School of Medicine, National Yang-Ming University, Taipei, Taiwan;"},{"name":"Institute of Pharmacology, National Yang-Ming University; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ching-Lan","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Medicine, National Yang-Ming University, Taipei, Taiwan;"},{"name":"Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Henrich","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital;"},{"name":"School of Medicine, National Yang-Ming University, Taipei, Taiwan;"},{"name":"Institute of Pharmacology, National Yang-Ming University; and"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1","series-title":"J Am Acad Orthop Surg","doi-asserted-by":"publisher","first-page":"203","DOI":"10.5435\/JAAOS-22-04-203","article-title":"Surgical management of lumbar degenerative spondylolisthesis","volume":"22","author":"Eismont FJ","year":"2014","unstructured":"Eismont FJ, Norton RP, Hirsch BP: Surgical management of lumbar degenerative spondylolisthesis. 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