Laminar closure rates in patients with cervical myelopathies treated with either open-door laminoplasty with reattachment of spinous processes and extensor musculature or Hirabayashi open-door laminoplasty

a case–control study

Kentaro Yamane, Yoshihisa Sugimoto, Masato Tanaka, Shinya Arataki, Tomoyuki Takigawa, Toshihumi Ozaki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: The presence of preoperative kyphosis has been identified as a risk factor for laminar closure (LC). We have been performing modified open-door laminoplasty with reattachment of the spinous processes and extensor musculature for patients with reduced cervical lordosis because this procedure can prevent progression of cervical kyphosis. This procedure may also prevent LC. The purpose of this study was to evaluate the rate of LC after the modified open-door laminoplasty. Methods: A total of 104 patients who underwent open-door laminoplasty were retrospectively reviewed. Of these patients, 18 underwent modified open-door laminoplasty (group M), whereas the other 86 underwent Hirabayashi open-door laminoplasty (group H). Group H was divided into two classes according to the preoperative cervical lordosis angle (group H1 ≤ 10° vs. group H2 ≥ 11°). All 18 patients in group M had a preoperative lordosis angle ≤10°. The outcomes were assessed using the rate of LC, the cross-sectional area (CSA) of the erector muscle on magnetic resonance imaging, and the Japanese Orthopaedic Association score (JOA score). Results: The rate of laminar closure was significantly lower in group M (39 %) than in group H1 (76 %) (P <0.01). The CSAs tended to be larger in the muscle preservation side of group M than in the other groups. There was no significant difference in the JOA score among the three groups. Conclusions: Although patients with decreased cervical lordosis have a higher risk of LC, the results suggested that modified open-door laminoplasty could reduce the rate of LC compared with Hirabayashi open-door laminoplasty.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalEuropean Spine Journal
DOIs
Publication statusAccepted/In press - Jan 28 2016

Fingerprint

Spinal Cord Diseases
Lordosis
Kyphosis
Muscles
Laminoplasty
Orthopedics
Magnetic Resonance Imaging

Keywords

  • Cervical kyphosis
  • Cervical myelopathy
  • Laminar closure
  • Modified open-door laminoplasty
  • Open-door laminoplasty

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

@article{e432ee680a99420c83b96a9dcc119a7e,
title = "Laminar closure rates in patients with cervical myelopathies treated with either open-door laminoplasty with reattachment of spinous processes and extensor musculature or Hirabayashi open-door laminoplasty: a case–control study",
abstract = "Purpose: The presence of preoperative kyphosis has been identified as a risk factor for laminar closure (LC). We have been performing modified open-door laminoplasty with reattachment of the spinous processes and extensor musculature for patients with reduced cervical lordosis because this procedure can prevent progression of cervical kyphosis. This procedure may also prevent LC. The purpose of this study was to evaluate the rate of LC after the modified open-door laminoplasty. Methods: A total of 104 patients who underwent open-door laminoplasty were retrospectively reviewed. Of these patients, 18 underwent modified open-door laminoplasty (group M), whereas the other 86 underwent Hirabayashi open-door laminoplasty (group H). Group H was divided into two classes according to the preoperative cervical lordosis angle (group H1 ≤ 10° vs. group H2 ≥ 11°). All 18 patients in group M had a preoperative lordosis angle ≤10°. The outcomes were assessed using the rate of LC, the cross-sectional area (CSA) of the erector muscle on magnetic resonance imaging, and the Japanese Orthopaedic Association score (JOA score). Results: The rate of laminar closure was significantly lower in group M (39 {\%}) than in group H1 (76 {\%}) (P <0.01). The CSAs tended to be larger in the muscle preservation side of group M than in the other groups. There was no significant difference in the JOA score among the three groups. Conclusions: Although patients with decreased cervical lordosis have a higher risk of LC, the results suggested that modified open-door laminoplasty could reduce the rate of LC compared with Hirabayashi open-door laminoplasty.",
keywords = "Cervical kyphosis, Cervical myelopathy, Laminar closure, Modified open-door laminoplasty, Open-door laminoplasty",
author = "Kentaro Yamane and Yoshihisa Sugimoto and Masato Tanaka and Shinya Arataki and Tomoyuki Takigawa and Toshihumi Ozaki",
year = "2016",
month = "1",
day = "28",
doi = "10.1007/s00586-016-4398-3",
language = "English",
pages = "1--6",
journal = "European Spine Journal",
issn = "0940-6719",
publisher = "Springer Verlag",

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TY - JOUR

T1 - Laminar closure rates in patients with cervical myelopathies treated with either open-door laminoplasty with reattachment of spinous processes and extensor musculature or Hirabayashi open-door laminoplasty

T2 - a case–control study

AU - Yamane, Kentaro

AU - Sugimoto, Yoshihisa

AU - Tanaka, Masato

AU - Arataki, Shinya

AU - Takigawa, Tomoyuki

AU - Ozaki, Toshihumi

PY - 2016/1/28

Y1 - 2016/1/28

N2 - Purpose: The presence of preoperative kyphosis has been identified as a risk factor for laminar closure (LC). We have been performing modified open-door laminoplasty with reattachment of the spinous processes and extensor musculature for patients with reduced cervical lordosis because this procedure can prevent progression of cervical kyphosis. This procedure may also prevent LC. The purpose of this study was to evaluate the rate of LC after the modified open-door laminoplasty. Methods: A total of 104 patients who underwent open-door laminoplasty were retrospectively reviewed. Of these patients, 18 underwent modified open-door laminoplasty (group M), whereas the other 86 underwent Hirabayashi open-door laminoplasty (group H). Group H was divided into two classes according to the preoperative cervical lordosis angle (group H1 ≤ 10° vs. group H2 ≥ 11°). All 18 patients in group M had a preoperative lordosis angle ≤10°. The outcomes were assessed using the rate of LC, the cross-sectional area (CSA) of the erector muscle on magnetic resonance imaging, and the Japanese Orthopaedic Association score (JOA score). Results: The rate of laminar closure was significantly lower in group M (39 %) than in group H1 (76 %) (P <0.01). The CSAs tended to be larger in the muscle preservation side of group M than in the other groups. There was no significant difference in the JOA score among the three groups. Conclusions: Although patients with decreased cervical lordosis have a higher risk of LC, the results suggested that modified open-door laminoplasty could reduce the rate of LC compared with Hirabayashi open-door laminoplasty.

AB - Purpose: The presence of preoperative kyphosis has been identified as a risk factor for laminar closure (LC). We have been performing modified open-door laminoplasty with reattachment of the spinous processes and extensor musculature for patients with reduced cervical lordosis because this procedure can prevent progression of cervical kyphosis. This procedure may also prevent LC. The purpose of this study was to evaluate the rate of LC after the modified open-door laminoplasty. Methods: A total of 104 patients who underwent open-door laminoplasty were retrospectively reviewed. Of these patients, 18 underwent modified open-door laminoplasty (group M), whereas the other 86 underwent Hirabayashi open-door laminoplasty (group H). Group H was divided into two classes according to the preoperative cervical lordosis angle (group H1 ≤ 10° vs. group H2 ≥ 11°). All 18 patients in group M had a preoperative lordosis angle ≤10°. The outcomes were assessed using the rate of LC, the cross-sectional area (CSA) of the erector muscle on magnetic resonance imaging, and the Japanese Orthopaedic Association score (JOA score). Results: The rate of laminar closure was significantly lower in group M (39 %) than in group H1 (76 %) (P <0.01). The CSAs tended to be larger in the muscle preservation side of group M than in the other groups. There was no significant difference in the JOA score among the three groups. Conclusions: Although patients with decreased cervical lordosis have a higher risk of LC, the results suggested that modified open-door laminoplasty could reduce the rate of LC compared with Hirabayashi open-door laminoplasty.

KW - Cervical kyphosis

KW - Cervical myelopathy

KW - Laminar closure

KW - Modified open-door laminoplasty

KW - Open-door laminoplasty

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U2 - 10.1007/s00586-016-4398-3

DO - 10.1007/s00586-016-4398-3

M3 - Article

SP - 1

EP - 6

JO - European Spine Journal

JF - European Spine Journal

SN - 0940-6719

ER -