Does Preoperative T1 Slope Affect Radiological and Functional Outcomes After Cervical Laminoplasty?

Cho, Jae-Hwan; Ha, Jung-Ki; Kim, Dae Geun; Song, Keum-Young; Kim, Yung-Tae; Hwang, Chang Ju; Lee, Choon Sung; Lee, Dong‐Ho

doi:10.1097/brs.0000000000000614

Cited by 75 publications

(59 citation statements)

References 13 publications

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“…12,23 Some cervical parameters, such as T1 slope, cervical regional kyphosis, and K-line, have been reported as important factors related to laminoplasty outcomes. 5,10,24 C2-7 SVA is a parameter worth considering because it can cause poor QOL and axial neck pain after laminoplasty.…”

Section: Discussionmentioning

confidence: 99%

“…1–3 However, relatively few publications have defined normative values for cervical or thoracic sagittal balance, and even fewer have directly evaluated the influence of cervical segmental and regional balance on outcomes in cervical surgery. 4–7 Scheer et al provided a definition of the cervical sagittal vertical axis (C2-7 SVA) that refers to the distance between a plumb line dropped from the centroid of C2 (or dens) and the posterosuperior aspect of C7. 7 This parameter is expected to provide a measure of cervical regional balance.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cervical Sagittal Balance on Laminoplasty in Patients With Cervical Myelopathy

Kato

Namikawa

Matsumura

et al. 2017

Global Spine Journal

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Study Design:Retrospective clinical study.Objective:We evaluated the relationship between cervical sagittal alignment parameters and clinical status in patients with cervical myelopathy and analyzed the effect of cervical sagittal balance on cervical laminoplasty.Methods:Patients with cervical myelopathy (n = 110) who underwent laminoplasty were included in this study. The relationship between cervical sagittal alignment parameters and clinical status was evaluated. The changes in radiographic cervical sagittal parameters and clinical status 2 years after surgery were compared between patients with preoperative C2-7 SVA ≥35 mm (group A) and those with preoperative C2-7 SVA <35 mm (group B).Results:Preoperatively, C2-7 SVA had no correlation with defined health-related quality of life evaluation scores. At 2-year follow-up, the improvement in SF-36 physical component summary was significantly lower in group A than in group B. The postoperative change of C2-7 SVA did not significantly differ in 2 groups. Patients in group A maintained cervical regional balance after laminoplasty but experienced extensive postoperative neck pain.Conclusions:Our patients with a C2-7 SVA of ≥35 mm maintained cervical regional balance after laminoplasty and their improvement in myelopathy was equivalent to that in patients with a C2-7 SVA of <35 mm. However, the patents with a C2-7 SVA of ≥35 mm experienced severe postoperative neck pain. C2-7 SVA is a parameter worth considering because it can lead to poor QOL and axial neck pain after laminoplasty.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Cervical Sagittal Balance on Laminoplasty in Patients With Cervical Myelopathy

Kato

Namikawa

Matsumura

et al. 2017

Global Spine Journal

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“…[4] An estimated 31% of patients with ACP develop cervical spondylotic myelopathy (CSM). [5] The associated degenerative changes in the cervical spine can be accelerated by involuntary movements of the head and neck, and neural elements can be stimulated or compressed by dynamic instability [6] and a herniated cervical disc, [7] particularly in the presence of developmental spinal canal stenosis. [8] Torg–Pavlov ratio [9] values of 0.80 or less have been shown to predict developmental spinal canal stenosis.…”

Section: Introductionmentioning

confidence: 99%

Laminoplasty with lateral mass screw fixation for cervical spondylotic myelopathy in patients with athetoid cerebral palsy

et al. 2016

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Although several studies report various treatment solutions for cervical spondylotic myelopathy in patients with athetoid cerebral palsy, long-term follow-up studies are very rare. None of the reported treatment solutions represent a gold standard for this disease owing to the small number of cases and lack of long-term follow-up. This study aimed to evaluate the outcomes of laminoplasty with lateral mass screw fixation to treat cervical spondylotic myelopathy in patients with athetoid cerebral palsy from a single center.This retrospective study included 15 patients (9 male patients and 6 female patients) with athetoid cerebral palsy who underwent laminoplasty with lateral mass screw fixation for cervical spondylotic myelopathy at our hospital between March 2006 and June 2010. Demographic variables, radiographic parameters, and pre- and postoperative clinical outcomes determined by the modified Japanese Orthopedic Association (JOA), Neck Disability Index (NDI), and visual analog scale (VAS) scores were assessed.The mean follow-up time was 80.5 months. Developmental cervical spinal canal stenosis (P = 0.02) and cervical lordosis (P = 0.04) were significantly correlated with lower preoperative modified JOA scores. The mean modified JOA scores increased from 7.97 preoperatively to 12.1 postoperatively (P < 0.01). The mean VAS score decreased from 5.30 to 3.13 (P < 0.01), and the mean NDI score decreased from 31.73 to 19.93 (P < 0.01). There was a significant negative correlation between developmental cervical spinal canal stenosis and recovery rate of the modified JOA score (P = 0.01).Developmental cervical spinal canal stenosis is significantly related to neurological function in patients with athetoid cerebral palsy. Laminoplasty with lateral mass screw fixation is an effective treatment for cervical spondylotic myelopathy in patients with athetoid cerebral palsy and developmental cervical spinal canal stenosis.

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“…The recent work by Kim et al specifically investigating postlaminoplasty cases reported that the preoperative higher T1 slope is a risk factor for developing kyphotic change after 2 years 8) . However, others reported that T1 slope does not affect a change in CL after ELAP 7,11) . At present, the preoperative factors that predict postoperative kyphosis have yet to be fully identified.…”

Section: Introductionmentioning

confidence: 93%

Cervical Kyphotic Deformity after Laminoplasty in Patients with Cervical Ossification of Posterior Longitudinal Ligament with Normal Sagittal Spinal Alignment

Matsuoka

Endo

Nishimura

et al. 2018

Spine Surg Relat Res

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Does Preoperative T1 Slope Affect Radiological and Functional Outcomes After Cervical Laminoplasty?

Abstract: 3.

Cited by 75 publications

References 13 publications

Effect of Cervical Sagittal Balance on Laminoplasty in Patients With Cervical Myelopathy

Effect of Cervical Sagittal Balance on Laminoplasty in Patients With Cervical Myelopathy

Laminoplasty with lateral mass screw fixation for cervical spondylotic myelopathy in patients with athetoid cerebral palsy

Cervical Kyphotic Deformity after Laminoplasty in Patients with Cervical Ossification of Posterior Longitudinal Ligament with Normal Sagittal Spinal Alignment

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