NDLI: Segmental motion at the peak of the ossification foci is independent risk factor except for mal-alignment and thick ossification foci for poor outcome after laminoplasty for cervical ossification of the posterior longitudinal ligament: analyses in patients with positive K-line, lordotic alignment, and lower canal occupying ratio

Content Provider	Springer Nature : BioMed Central
Author	Saito, Junya Koda, Masao Furuya, Takeo Maki, Satoshi Ijima, Yasushi Kitamura, Mitsuhiro Miyamoto, Takuya Orita, Sumihisa Inage, Kazuhide Hasue, Fumio Fujiyoshi, Takayuki Kamiya, Koshiro Ikeda, Yoshikazu Nakajima, Fumitake Hashimoto, Mitsuhiro Noguchi, Hiroshi Takahashi, Hiroshi Yamazaki, Masashi Ohtori, Seiji
Abstract	Purpose To elucidate the independent preoperative factors that have a significant impact on poor surgical outcome after laminoplasty for K-line (+) ossification of the posterior longitudinal ligament (OPLL). Analyses in K-line (+) patient population can exclude the influence by mal-alignment and thick OPLL, both of which are well known two major factors that have significant impact on clinical outcome. Methods The present study included 72 patients (50 male and 22 female) who underwent laminoplasty for K-line (+) cervical OPLL and were followed-up for at least 1 year. Recovery of Japanese Orthopedic Association score (JOA score) for cervical myelopathy was used as the measure of clinical outcome. For radiographic assessment, the type of OPLL, the maximum OPLL occupation ratio, the C2-C7 angle, and the segmental range of motion at the peak of OPLL (segmental ROM) were assessed. To elucidate the factors that are significantly associated with a poor clinical outcome after laminoplasty for K-line (+) OPLL, statistical analyses were conducted. Results The mean preoperative JOA score was 8.9 points and improved to 12.8 points after surgery. The recovery of JOA score was 47 ± 35%. Stepwise logistic regression following univariate analyses revealed that preoperative segmental ROM at the peak of OPLL is an independent factor associated with a poor outcome (p = 0.04, odds ratio = 1.15). Conclusions Large preoperative segmental ROM at the peak of the OPLL is an independent factor that has significant impact on poor surgical outcome after laminoplasty for K-line (+) OPLL.
Related Links	https://josr-online.biomedcentral.com/counter/pdf/10.1186/s13018-020-01903-3.pdf
Ending Page	5
Page Count	5
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s13018-020-01903-3
Journal	Journal of Orthopaedic Surgery and Research
Issue Number	1
Volume Number	15
Language	English
Publisher	BioMed Central
Publisher Date	2020-09-14
Access Restriction	Open
Subject Keyword	Orthopedics Surgical Orthopedics Ossification of the posterior longitudinal ligament K-line Laminoplasty Risk factor Segmental range of motion
Content Type	Text
Resource Type	Article
Subject	Surgery Orthopedics and Sports Medicine
Journal Impact Factor	2.8/2023
5-Year Journal Impact Factor	3/2023

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