Long-Term Outcomes of Spinous Process Splitting Laminoplasty Using Coralline Hydroxyapatite (SLAC) for Multilevel Degenerative Cervical Myelopathy: A Comparative Study of CSM and OPLL.
- 1Department of Orthopedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing, P. R. China.
Abstract
Study DesignRetrospective study.ObjectiveTo evaluate the long-term clinical and radiographic outcomes of SLAC for multilevel DCM and to determine whether outcomes differ between patients with cervical spondylotic myelopathy (CSM) and ossification of the posterior longitudinal ligament (OPLL).MethodsA total of 146 patients were reviewed, including 99 patients with CSM and 47 with OPLL. Clinical outcomes were assessed using the Japanese Orthopaedic Association (JOA) score, JOA recovery rate, Neck Disability Index (NDI), modified MacNab, bone fusion rate and postoperative complications. Radiographic parameters included C2-C7 Cobb angle and cervical range of motion (ROM). The mean follow-up was 156.5 ± 23.2 months.ResultsBoth groups showed significant postoperative improvement in JOA and NDI scores. In the CSM group, the JOA score improved from 11.4 ± 2.8 preoperatively to 15.0 ± 1.8 at the best postoperative follow-up and remained 14.1 ± 2.5 at final follow-up. In the OPLL group, the JOA score improved from 11.0 ± 3.4 to 14.7 ± 2.2 and remained 14.0 ± 2.0 at final follow-up. No significant intergroup differences were observed in JOA score, NDI, modified MacNab grade distribution, or postoperative complications. However, both groups showed a mild but significant decline in neurological function from the best postoperative status to final follow-up. Radiographically, cervical lordosis decreased significantly only in the CSM group. Preoperative ROM was smaller in the OPLL group, and ROM decreased significantly in both groups.ConclusionSLAC provides durable decompression and sustained functional improvement for multilevel DCM, with comparable long-term outcomes between CSM and OPLL patients.
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BibTeX
@article{li2026longterm,
title = {{Long-Term Outcomes of Spinous Process Splitting Laminoplasty Using Coralline Hydroxyapatite (SLAC) for Multilevel Degenerative Cervical Myelopathy: A Comparative Study of CSM and OPLL.}},
author = {Hao Li and Lei Li and Jiyuan Xia and Yuqi Ge and Ruixuan Yu and Guihe Yang and Bin Xiao and Da He and Jile Jiang},
journal = {Global spine journal},
year = {2026},
month = oct,
doi = {10.1177/21925682261503540},
url = {https://europepmc.org/article/MED/42954033},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Long-Term Outcomes of Spinous Process Splitting Laminoplasty Using Coralline Hydroxyapatite (SLAC) for Multilevel Degenerative Cervical Myelopathy: A Comparative Study of CSM and OPLL.
AU - Hao Li
AU - Lei Li
AU - Jiyuan Xia
AU - Yuqi Ge
AU - Ruixuan Yu
AU - Guihe Yang
AU - Bin Xiao
AU - Da He
AU - Jile Jiang
PY - 2026
DA - 2026/10/29
JO - Global spine journal
DO - 10.1177/21925682261503540
UR - https://europepmc.org/article/MED/42954033
AB - Study DesignRetrospective study.ObjectiveTo evaluate the long-term clinical and radiographic outcomes of SLAC for multilevel DCM and to determine whether outcomes differ between patients with cervical spondylotic myelopathy (CSM) and ossification of the posterior longitudinal ligament (OPLL).MethodsA total of 146 patients were reviewed, including 99 patients with CSM and 47 with OPLL. Clinical outcomes were assessed using the Japanese Orthopaedic Association (JOA) score, JOA recovery rate, Neck Disability Index (NDI), modified MacNab, bone fusion rate and postoperative complications. Radiographic parameters included C2-C7 Cobb angle and cervical range of motion (ROM). The mean follow-up was 156.5 ± 23.2 months.ResultsBoth groups showed significant postoperative improvement in JOA and NDI scores. In the CSM group, the JOA score improved from 11.4 ± 2.8 preoperatively to 15.0 ± 1.8 at the best postoperative follow-up and remained 14.1 ± 2.5 at final follow-up. In the OPLL group, the JOA score improved from 11.0 ± 3.4 to 14.7 ± 2.2 and remained 14.0 ± 2.0 at final follow-up. No significant intergroup differences were observed in JOA score, NDI, modified MacNab grade distribution, or postoperative complications. However, both groups showed a mild but significant decline in neurological function from the best postoperative status to final follow-up. Radiographically, cervical lordosis decreased significantly only in the CSM group. Preoperative ROM was smaller in the OPLL group, and ROM decreased significantly in both groups.ConclusionSLAC provides durable decompression and sustained functional improvement for multilevel DCM, with comparable long-term outcomes between CSM and OPLL patients.
SN - 2192-5682
SN - 2192-5690
ER -