{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T03:09:55Z","timestamp":1784603395402,"version":"3.55.0"},"reference-count":72,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["FOC"],"published-print":{"date-parts":[[2013,7]]},"abstract":"<jats:sec>\n                    <jats:title>Object<\/jats:title>\n                    <jats:p>There are little data on the effects of plated, or plate-only, open-door laminoplasty on cervical range of motion (ROM), neck pain, and clinical outcomes. The purpose of this study was to compare ROM after a plated laminoplasty in patients with ossification of posterior longitudinal ligament (OPLL) versus those with cervical spondylotic myelopathy (CSM) and to correlate ROM with postoperative neck pain and neurological outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The authors retrospectively compared patients with a diagnosis of cervical stenosis due to either OPLL or CSM who had been treated with plated laminoplasty in the period from 2007 to 2012 at the University of California, San Francisco. Clinical outcomes were measured using the modified Japanese Orthopaedic Association (mJOA) scale and neck visual analog scale (VAS). Radiographic outcomes included assessment of changes in the C2\u20137 Cobb angle at flexion and extension, ROM at C2\u20137, and ROM of proximal and distal segments adjacent to the plated lamina.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Sixty patients (40 men and 20 women) with an average age of 63.1 \u00b1 10.9 years were included in the study. Forty-one patients had degenerative CSM and 19 patients had OPLL. The mean follow-up period was 20.9 \u00b1 13.1 months.<\/jats:p>\n                    <jats:p>The mean mJOA score significantly improved in both the CSM and the OPLL groups (12.8 to 14.5, p &lt; 0.01; and 13.2 to 14.2, respectively; p = 0.04). In the CSM group, the mean VAS neck score significantly improved from 4.2 to 2.6 after surgery (p = 0.01), but this improvement did not reach the minimum clinically important difference (MCID). Neither was there significant improvement in the VAS neck score in the OPLL group (3.6 to 3.1, p = 0.17).<\/jats:p>\n                    <jats:p>In the CSM group, ROM at C2\u20137 significantly decreased from 32.7\u00b0 before surgery to 24.4\u00b0 after surgery (p &lt; 0.01). In the OPLL group, ROM at C2\u20137 significantly decreased from 34.4\u00b0 to 20.8\u00b0 (p &lt; 0.01). In the CSM group, the change in the VAS neck score significantly correlated with the change in the flexion angle (r = \u2212 0.31) and the extension angle (r = \u2212 0.37); however, it did not correlate with the change in ROM at C2\u20137 (r = \u2212 0.1). In the OPLL group, the change in the VAS neck score did not correlate with the change in the flexion angle (r = 0.03), the extension angle (r = \u2212 0.17), or the ROM at C2\u20137 (r = \u2212 0.28). The OPLL group had a significantly greater loss of ROM after surgery than did the CSM group (p = 0.04). There was no significant correlation between the change in ROM and the mJOA score in either group.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Plated laminoplasty in patients with either OPLL or CSM decreases cervical ROM, especially in the extension angle. Among patients who have undergone laminoplasty, those with OPLL lose more ROM than do those with CSM. No correlation was observed between neck pain and ROM in either group. Neither group had a change in neck pain that reached the MCID following laminoplasty. Both groups improved in neurological function and outcomes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/2013.4.focus1394","type":"journal-article","created":{"date-parts":[[2013,7,1]],"date-time":"2013-07-01T09:58:16Z","timestamp":1372672696000},"page":"E9","source":"Crossref","is-referenced-by-count":46,"title":["Is there a difference in range of motion, neck pain, and outcomes in patients with ossification of posterior longitudinal ligament versus those with cervical spondylosis, treated with plated laminoplasty?"],"prefix":"10.3171","volume":"35","author":[{"given":"Takahito","family":"Fujimori","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, University of California, San Francisco, California; and"},{"name":"Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hai","family":"Le","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of California, San Francisco, California; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John E.","family":"Ziewacz","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of California, San Francisco, California; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dean","family":"Chou","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of California, San Francisco, California; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Praveen V.","family":"Mummaneni","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of California, San Francisco, California; and"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1-0350009","series-title":"Spine (Phila Pa 1976)","doi-asserted-by":"publisher","first-page":"2738","DOI":"10.1097\/00007632-199812150-00014","article-title":"Postlaminectomy kyphosis","volume":"23","author":"Albert","year":"1998"},{"key":"b2-0350009","series-title":"J Neurosurg Spine","doi-asserted-by":"publisher","first-page":"635","DOI":"10.3171\/2009.12.SPINE09181","article-title":"Evaluation of neck pain by using a visual analog scale before and after laminoplasty in patients with cervical myelopathy: relationship with clinical results. 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