Does Ossification of the Posterior Longitudinal Ligament Progress After Fusion?

Vaziri, Sasha; Lockney, Dennis T.; Dru, Alexander; Polifka, Adam; Fox, W. Christopher; Hoh, Daniel J.

doi:10.14245/ns.1938286.143

Cited by 14 publications

(11 citation statements)

References 47 publications

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“…Additionally, MR-based parameters, such as the occupying ratio, OPLL shape, and cord signal change have a significant impact on clinical outcomes. Complications of laminoplasty such as LCL, C5 palsy [ 49 ], postoperative neck pain, increased size of OPLL [ 70 ], decreased ROM, and insufficient decompression also affects clinical outcomes. In this regard, there is a limited degree to which clinical effects can be analyzed in terms of alignment factors alone.…”

Section: Discussionmentioning

confidence: 99%

Preoperative Radiological Parameters to Predict Clinical and Radiological Outcomes after Laminoplasty

Lee

Son

Shin

et al. 2021

J Korean Neurosurg Soc

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Many studies have focused on pre-operative sagittal alignment parameters which could predict poor clinical or radiological outcomes after laminoplasty. However, the influx of too many new factors causes confusion. This study reviewed sagittal alignment parameters, predictive of clinical or radiological outcomes, in the literature. Preoperative kyphotic alignment was initially proposed as a predictor of clinical outcomes. The clinical significance of the K-line and K-line variants also has been studied. Sagittal vertical axis, T1 slope (T1s), T1s-cervical lordosis (CL), anterolisthesis, local kyphosis, the longitudinal distance index, and range of motion were proposed to have relationships with clinical outcomes. The relationship between loss of cervical lordosis (LCL) and T1s has been widely studied, but controversy remains. Extension function, the ratio of CL to T1s (CL/T1s), and Sharma classification were recently proposed as LCL predictors. In predicting postoperative kyphosis, T1s cannot predict postoperative kyphosis, but a low CL/ T1s ratio was associated with postoperative kyphosis.

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Section: Discussionmentioning

confidence: 99%

Preoperative Radiological Parameters to Predict Clinical and Radiological Outcomes after Laminoplasty

Lee

Son

Shin

et al. 2021

J Korean Neurosurg Soc

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“…Laminoplasty is an indirect decompressive procedure regardless of whether it is performed by mFDL or ODL. Various sequelae affecting the prognosis are not uncommon, such as progression of OPLL and loss of lordosis during follow-up [ 36 ]. Fifth, because this was a multicenter study involving several orthopedic spine surgeons or neurosurgeons from three countries in East Asia, bias in the distinction of operative techniques among these surgeons was inevitable.…”

Section: Discussionmentioning

confidence: 99%

Are clinical outcomes affected by laminoplasty method and K-line in patients with cervical ossification of posterior longitudinal ligament? A multicenter study

Duan

et al. 2022

J Orthop Surg Res

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Background Open-door laminoplasty (ODL) and French-door laminoplasty (FDL) are the main laminoplasty techniques used to treat cervical ossification of the posterior longitudinal ligament (C-OPLL). However, few studies have compared the outcomes of ODL and modified FDL (mFDL) for C-OPLL. We explored the differences in outcomes between ODL and mFDL for C-OPLL and analyzed the technical efficacy of each procedure in patients with K-line (+) or (−) C-OPLL. Methods From January 2010 to December 2015, 202 patients with K-line (+) or (−) C-OPLL were retrospectively recruited from 4 institutions. Clinical outcomes were evaluated using the Japanese Orthopaedic Association (JOA) score, JOA score recovery rate, operative time, blood loss, and complications. Univariate analysis and binary logistic regression models were adjusted for confounding factors. Results Two hundred patients (mFDL, n = 69; ODL, n = 131) with a median follow-up of 42 months (range 36–54 months) were included. The postoperative JOA score significantly improved in both groups (P < 0.05). After adjusting for confounding factors, there was a statistically significant difference in blood loss (≥ 300 mL) between the two groups (P = 0.005), but there was no significant difference in the postoperative JOA score (≥ 14) (P = 0.062), JOA score recovery rate (≥ 0.82) (P = 0.187), or operative time (≥ 90 min) (P = 0.925). C5 palsy tended to occur more often in the mFDL group, although the difference was not significant (P > 0.05). The stratified analysis of the K-line status showed more blood loss in K-line (+) patients who underwent mFDL, but there was no significant difference in the postoperative JOA score, JOA score recovery rate, or operative time between the ODL and mFDL groups. Additionally, there was no significant difference in blood loss, postoperative JOA score, JOA score recovery rate, or operative time among all patients with K-line (+) or (−) C-OPLL in both groups. Conclusions Both ODL and mFDL are effective for patients with C-OPLL. However, more blood loss tends to occur during mFDL. This study showed no significant difference in the operative time or incidence of complications between the two techniques. The efficacy of ODL and mFDL was not affected by the K-line status (+ or −) in patients with C-OPLL.

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“…Using sagittal images, we measured OPLL (present or not) and OPLL type (segmental, continuous, circumscribed, and mixed) [ 12 , 14 - 17 ], and ED (normal, focal defect, corner defect, erosion, and sclerosis) [ 18 ]. Using coronal images, UD was evaluated (normal, hypertrophied).…”

Section: Methodsmentioning

confidence: 99%

Relationship Between Endplate Defects, Modic Change, Facet Joint Degeneration, and Disc Degeneration of Cervical Spine

et al. 2020

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Objective: The ''disc degeneration precedes facet joint osteoarthritis'' hypothesis and multidimensional analysis were actively discussed in lumbar spine. However, in cervical spine degeneration, the multifactorial analyzes of disc degeneration (DD), Modic changes (Mcs), facet degeneration, and endplate degeneration (ED) is still limited. In this cross-sectional study, we aimed to analyze the prevalence and interrelationship of cervical DD parameters. Methods: We retrospectively recruited 62 patients aged between 60 and 70 years. The disc height, segmental angle, ossified posterior longitudinal ligament (OPLL), ED, facet joint degeneration (FD), uncovertebral joint degeneration (UD), DD, spinal stenosis (SS), Mc, and cord signal change (CS) were evaluated using a previously well-known grading system.

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Does Ossification of the Posterior Longitudinal Ligament Progress After Fusion?

Cited by 14 publications

References 47 publications

Preoperative Radiological Parameters to Predict Clinical and Radiological Outcomes after Laminoplasty

Preoperative Radiological Parameters to Predict Clinical and Radiological Outcomes after Laminoplasty

Are clinical outcomes affected by laminoplasty method and K-line in patients with cervical ossification of posterior longitudinal ligament? A multicenter study

Relationship Between Endplate Defects, Modic Change, Facet Joint Degeneration, and Disc Degeneration of Cervical Spine

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