Spine‐Pelvis‐Hip Alignments in Degenerative Spinal Deformity Patients and Associated Procedure of One‐Stage Long‐Fusion with Multiple‐Level PLIF or Apical‐Vertebra Three Column Osteotomy–a Clinical and Radiographic Analysis Study

Abstract The pathogenesis of postlaminectomy spinal deformity and instability in children was evaluated by reviewing appropriate roentgenographic findings. First, we reviewed spine roentgenograms of patients below 40 years of age who underwent spinal fusion for deformity and instability of the spine developing after a multiple level laminectomy. Two types of deformity were recognized on the roentgenograms: increased mobility between the vertebral bodies and wedging deformity of the ventral aspect of the vertebral bodies. Second, we did a follow-up study of another group of patients who had undergone laminectomy. We found the same two types of deformity in children, but not in adult patients. The incidence of deformity was higher after laminectomies of the cervical or cervicothoracic region than after lumbar laminectomies. Our data suggest that postlaminectomy spinal deformity can develop in children without irradiation or facet injury. The deformity is due to a wedging change in the cartilaginous portion of the vertebral body and to the viscoelasticity of ligaments in children. When treatment of this complication becomes necessary, anterior fusion may be effective in arresting progression. Prophylactic measures against the development of deformity are discussed. Our hypothesis concerning the mechanism of development of this complication supports the rationale of osteoplastic laminar resection and reconstruction instead of laminectomy, particularly in the management of children.

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Surgical correction of severe forms of idiopathic kyphoscolyosis in children

Pediatric Traumatology Orthopaedics and Reconstructive Surgery ◽

10.17816/ptors735-14 ◽

2019 ◽

Vol 7 (3) ◽

pp. 5-14

Author(s):

Sergey V. Vissarionov ◽

Aleksandra N. Filippova ◽

Dmitriy N. Kokushin ◽

Vladislav V. Murashko ◽

Sergei M. Belyanchikov ◽

...

Keyword(s):

Surgical Treatment ◽

Idiopathic Scoliosis ◽

Spinal Deformity ◽

Wedge Osteotomy ◽

Apical Vertebra ◽

Metal Structures ◽

Neurophysiological Studies ◽

Significant Correction ◽

Long Term Observation ◽

System 1

Background. Significant results have been achieved through the use of hybrid and transpedicular metal structures. However, when spinal systems are implanted during surgery in patients with severe forms and idiopathic scoliosis, a number of limitations arise. Not only the performance of corrective maneuvers during the operation but also the creation of mobility on the top of the main arc accompany the strategies of surgical treatment. Traditionally, mobilizing discectomy at the top of the spark is performed in patients with idiopathic scoliosis. Pedicle subtractional vertebrotomy and Ponte and Smith-Petersen osteotomy are most common in neuromuscular scoliosis and spinal deformity, with a predominance of the kyphotic component. Problems with correction of extremely low and neglected forms and idiopathic scoliosis in children remain. Aim. The present study aimed to provide a comparative analysis between using transpedicular spinal systems alone and in combination with a wedge osteotomy of the apical vertebra to correct spinal deformity in children with extremely severe right-sided idiopathic thoracic scoliosis. Materials and methods. The surgical treatment results of 20 children 15 to 17 years old with extremely severe forms of right-sided idiopathic thoracic kyphoscoliosis were included in the analysis. All patients underwent standard preoperative examination, including radiology, computed tomography, magnetic resonance imaging, and neurophysiological studies. The patients were divided into two groups according to the method used during the second stage of surgical treatment correction of deformity with the transpedicular system (1) alone or (2) in combination with a wedge osteotomy of the apical vertebra. Results. Patients from the first group showed an amount of scoliotic and kyphotic component correction ranging from 25% to 62% and from 21% to 56%, respectively. In patients from the second group, who underwent additional wedge osteotomy of the apical vertebrae during the operation, correction of the scoliotic and kyphotic components ranged from 36% to 74% and from 50% to 70%, respectively. Conclusion. In children with idiopathic thoracic kyphoscoliosis, performing a wedge corpectomy of the apical vertebral body is an effective additional mobilizing component, which allows achieving significant correction of both scoliotic and kyphotic curve components, restoring the physiological profile of the spine and body balance during the surgical intervention, and maintaining the achieved result during the long-term observation period.

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The feasibility of computer-assisted 3D navigation in multiple-level lateral lumbar interbody fusion in combination with posterior instrumentation for adult spinal deformity

Neurosurgical FOCUS ◽

10.3171/2020.5.focus20353 ◽

2020 ◽

Vol 49 (3) ◽

pp. E4

Author(s):

Michael J. Strong ◽

Timothy J. Yee ◽

Siri Sahib S. Khalsa ◽

Yamaan S. Saadeh ◽

Kevin N. Swong ◽

...

Keyword(s):

Spinal Deformity ◽

Interbody Fusion ◽

Posterior Instrumentation ◽

Adult Spinal Deformity ◽

Intraoperative Complications ◽

Computer Assisted ◽

Lumbar Interbody Fusion ◽

Multiple Level ◽

Interbody Cage ◽

3D Navigation

OBJECTIVEThe lateral lumbar interbody fusion (LLIF) technique is used to treat many common spinal degenerative pathologies including kyphoscoliosis. The use of spinal navigation for LLIF has not been broadly adopted, especially in adult spinal deformity. The purpose of this study was to evaluate the feasibility as well as the intraoperative and navigation-related complications of computer-assisted 3D navigation (CaN) during multiple-level LLIF for spinal deformity.METHODSRetrospective analysis of clinical and operative characteristics was performed for all patients > 18 years of age who underwent multiple-level CaN LLIF combined with posterior instrumentation for adult spinal deformity at the University of Michigan between 2014 and 2020. Intraoperative CaN-related complications, LLIF approach–related postoperative complications, and medical postoperative complications were assessed.RESULTSFifty-nine patients were identified. The mean age was 66.3 years (range 42–83 years) and body mass index was 27.6 kg/m2 (range 18–43 kg/m2). The average coronal Cobb angle was 26.8° (range 3.6°–67.0°) and sagittal vertical axis was 6.3 cm (range −2.3 to 14.7 cm). The average number of LLIF and posterior instrumentation levels were 2.97 cages (range 2–5 cages) and 5.78 levels (range 3–14 levels), respectively. A total of 6 intraoperative complications related to the LLIF stage occurred in 5 patients. Three of these were CaN-related and occurred in 2 patients (3.4%), including 1 misplaced lateral interbody cage (0.6% of 175 total lateral cages placed) requiring intraoperative revision. No patient required a return to the operating room for a misplaced interbody cage. A total of 12 intraoperative complications related to the posterior stage occurred in 11 patients, with 5 being CaN-related and occurring in 4 patients (6.8%). Univariate and multivariate analyses revealed no statistically significant risk factors for intraoperative and CaN-related complications. Transient hip weakness and numbness were found to be in 20.3% and 22.0% of patients, respectively. At the 1-month follow-up, weakness was observed in 3.4% and numbness in 11.9% of patients.CONCLUSIONSUse of CaN in multiple-level LLIF in the treatment of adult spinal deformity appears to be a safe and effective technique. The incidence of approach-related complications with CaN was 3.4% and cage placement accuracy was high.

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