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Tytuł:
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Clinical Effects of Preoperative K-Line Tilt on Patient Outcomes After Laminoplasty for Cervical Ossification of the Posterior Longitudinal Ligament.
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Autorzy:
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Rao H; Department of Orthopaedic Surgery, Fuzhou Second Hospital affiliated to Xiamen University, Fuzhou, China.
Chen Y; Department of Spine Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
Xu W; Department of Spine Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
Zhou Z; Department of Orthopaedic Surgery, Sanming First Hospital Affiliated to Fujian Medical University, Sanming, China. Electronic address: .
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Źródło:
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World neurosurgery [World Neurosurg] 2021 Jun; Vol. 150, pp. e639-e644. Date of Electronic Publication: 2021 Mar 20.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: New York : Elsevier
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MeSH Terms:
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Laminoplasty*
Treatment Outcome*
Cervical Vertebrae/*pathology
Ossification of Posterior Longitudinal Ligament/*surgery
Spinal Curvatures/*pathology
Adult ; Aged ; Cervical Vertebrae/surgery ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies
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Contributed Indexing:
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Keywords: Cervical; K-line tilt; Laminoplasty; Ossification of posterior longitudinal ligament; Quality of life; Sagittal balance
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SCR Disease Name:
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Ossification of the posterior longitudinal ligament of the spine
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Entry Date(s):
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Date Created: 20210324 Date Completed: 20210823 Latest Revision: 20210823
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Update Code:
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20240105
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DOI:
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10.1016/j.wneu.2021.03.071
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PMID:
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33757888
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Objective: We sought to clarify the effects of the preoperative K-line tilt on cervical sagittal balance and patient outcomes after laminoplasty for cervical ossification of the posterior longitudinal ligament (OPLL).
Methods: A retrospective analysis of 45 patients with OPLL treated by laminoplasty from January 2013 to December 2018 was performed. The radiological parameters included the K-line tilt, C2-C7 sagittal vertical axis, C2-C7 lordosis, T1 slope, and T1 slope minus C2-C7 lordosis. The patient quality of life outcomes were assessed using the neck disability index, Japanese Orthopaedic Association disability scale, and visual analog scale. The patients were classified into 2 groups according to the median preoperative K-line tilt angle (14.1°): the high K-line tilt group (n = 23) and the low K-line tilt group (n = 22). The postoperative cervical alignment changes and patient outcomes were compared and analyzed.
Results: The clinical outcomes demonstrated overall improvement at the final follow-up. The C2-C7 lordosis had significantly decreased from 13.5° ± 9.5° preoperatively to 10.2° ± 9.7°. The C2-C7 lordosis was less in the high K-line tilt group than that in the low K-line tilt group. In addition, the high K-line tilt group revealed significantly greater kyphotic changes and a greater loss of cervical lordosis compared with the low K-line tilt group. Finally, the quality of life outcomes and postoperative visual analog scale scores were higher in the high K-line tilt group.
Conclusions: The results of the present study have shown that the parameter K-line tilt is an ideal radiological parameter for predicting the outcomes and determining the need for laminoplasty for cervical ossification of the OPLL. Patients with a higher K-line tilt preoperatively experienced more kyphotic alignment changes and neck pain after laminoplasty.
(Copyright © 2021 Elsevier Inc. All rights reserved.)
