scholarly journals Numerical evaluation of the correlation between the normal variation in the sagittal alignment of the lumbar spine and the spinal loads

2013 ◽  
Vol 32 (4) ◽  
pp. 537-544 ◽  
Author(s):  
Fabio Galbusera ◽  
Marco Brayda-Bruno ◽  
Francesco Costa ◽  
Hans-Joachim Wilke
Keyword(s):  
Lumbar Spine ◽  
Numerical Evaluation ◽  
Sagittal Alignment ◽  
Normal Variation ◽  
Spinal Loads

Classification of the Normal Variation in the Sagittal Alignment of the Human Lumbar Spine and Pelvis in the Standing Position

Spine ◽  
2005 ◽  
Vol 30 (3) ◽  
pp. 346-353 ◽  
Author(s):  
Pierre Roussouly ◽  
Sohrab Gollogly ◽  
Eric Berthonnaud ◽  
Johanes Dimnet
Keyword(s):  
Lumbar Spine ◽  
Sagittal Alignment ◽  
Standing Position ◽  
Normal Variation ◽  
Human Lumbar Spine

Outcomes of 2-level posterior lumbar interbody fusion for 2-level degenerative lumbar spondylolisthesis

2013 ◽  
Vol 19 (1) ◽  
pp. 90-94 ◽  
Author(s):  
Hironobu Sakaura ◽  
Tomoya Yamashita ◽  
Toshitada Miwa ◽  
Kenji Ohzono ◽  
Tetsuo Ohwada
Keyword(s):  
Lumbar Spine ◽  
Clinical Outcome ◽  
Interbody Fusion ◽  
Sagittal Alignment ◽  
Posterior Lumbar Interbody Fusion ◽  
Adjacent Segment ◽  
Lumbar Interbody Fusion ◽  
Single Level ◽  
The Mean

Object A systematic review concerning surgical management of lumbar degenerative spondylolisthesis (DS) showed that a satisfactory clinical outcome was significantly more likely with adjunctive spinal fusion than with decompression alone. However, the role of adjunctive fusion and the optimal type of fusion remain controversial. Therefore, operative management for multilevel DS raises more complicated issues. The purpose of this retrospective study was to elucidate clinical and radiological outcomes after 2-level PLIF for 2-level DS with the least bias in determination of operative procedure. Methods Since 2005, all patients surgically treated for lumbar DS at the authors' hospital have been treated using posterior lumbar interbody fusion (PLIF) with pedicle screws, irrespective of severity of slippage, patient age, or bone quality. The authors conducted a retrospective review of 20 consecutive cases involving patients who underwent 2-level PLIF for 2-level DS and had been followed up for 2 years or longer (2-level PLIF group). They also analyzed data from 92 consecutive cases involving patients who underwent single-level PLIF for single-level DS during the same time period and had been followed for at least 2 years (1-level PLIF group). This second group served as a control. Clinical status was assessed using the Japanese Orthopaedic Association (JOA) score. Fusion status and sagittal alignment of the lumbar spine were assessed by comparing serial plain radiographs. Surgery-related complications and the need for additional surgery were evaluated. Results The mean JOA score improved significantly from 12.8 points before surgery to 20.4 points at the latest follow-up in the 2-level PLIF group (mean recovery rate 51.8%), and from 14.2 points preoperatively to 22.5 points at the latest follow-up in the single-level PLIF group (mean recovery rate 55.3%). At the final follow-up, 95.0% of patients in the 2-level PLIF group and 96.7% of those in the 1-level PLIF group had achieved solid spinal fusion, and the mean sagittal alignment of the lumbar spine was more lordotic than before surgery in both groups. Early surgery-related complications, including transient neurological complications, occurred in 6 patients in the 2-level PLIF group (30.0%) and 11 patients in the 1-level PLIF group (12.0%). Symptomatic adjacent-segment disease was found in 4 patients in the 2-level PLIF group (20.0%) and 10 patients in the 1-level PLIF group (10.9%). Conclusions The clinical outcome of 2-level PLIF for 2-level lumbar DS was satisfactory, although surgery-related complications including symptomatic adjacent-segment disease were not negligible.

Hybrid Rigid-Deformable Model for Prediction of Neighboring Intervertebral Disk Loads During Flexion Movement After Lumbar Interbody Fusion at L3–4 Level

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Tien Tuan Dao
Keyword(s):  
Lumbar Spine ◽  
Computational Models ◽  
Interbody Fusion ◽  
Clinical Decision ◽  
Intervertebral Disk ◽  
Design Guideline ◽  
Spinal Loads ◽  
Stress Changes ◽  
Stress Behaviors

Knowledge of spinal loads in neighboring disks after interbody fusion plays an important role in the clinical decision of this treatment as well as in the elucidation of its effect. However, controversial findings are still noted in the literature. Moreover, there are no existing models for efficient prediction of intervertebral disk stresses within annulus fibrosus (AF) and nucleus pulposus (NP) regions. In this present study, a new hybrid rigid-deformable modeling workflow was established to quantify the mechanical stress behaviors within AF and NP regions of the L1–2, L2–3, and L4–5 disks after interbody fusion at L3–4 level. The changes in spinal loads were compared with results of the intact model without interbody fusion. The fusion outcomes revealed maximal stress changes (10%) in AF region of L1–2 disk and in NP region of L2–3 disk. The minimal stress change (1%) is noted at the NP region of the L1–2 disk. The validation of simulation outcomes of fused and intact lumbar spine models against those of other computational models and in vivo measurements showed good agreements. Thus, this present study may be used as a novel design guideline for a specific implant and surgical scenario of the lumbar spine disorders.

Does obesity impact lumbar sagittal alignment and clinical outcomes after a posterior lumbar spine fusion?

2019 ◽  
Vol 29 (2) ◽  
pp. 340-348
Author(s):  
Jannat M. Khan ◽  
Bryce A. Basques ◽  
Kyle N. Kunze ◽  
Gagan Grewal ◽  
Young Soo Hong ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Clinical Outcomes ◽  
Sagittal Alignment ◽  
Spine Fusion ◽  
Lumbar Spine Fusion

Kyphosis

2011 ◽  
Author(s):  
Michael Grevitt ◽  
John K. Webb
Keyword(s):  
Lumbar Spine ◽  
Conservative Treatment ◽  
Sagittal Balance ◽  
Sagittal Alignment ◽  
Neurological Complications ◽  
Kyphotic Deformity ◽  
Global Problem ◽  
Limited Role ◽  
Spinal Segments

♦ Kyphosis may be a focal deformity limited to a few spinal segments or a more global problem involving the thoraco-lumbar spine♦ The causes are myriad and reflect all the disease processes that affect bone♦ As well as producing pain from disturbed sagittal balance, neurological complications can occur infrequently♦ Conservative treatment in established kyphotic deformity has a limited role♦ The aims of surgery are to correct the deformity, restore sagittal alignment and decompress the neural elements as required.

The Effect of Operative Position and Short-Segment Fusion on Maintenance of Sagittal Alignment of the Lumbar Spine

Spine ◽  
1999 ◽  
Vol 24 (1) ◽  
pp. 58-61 ◽  
Author(s):  
Clifford B. Tribus ◽  
Theodore A. Belanger ◽  
Thomas A. Zdeblick
Keyword(s):  
Lumbar Spine ◽  
Sagittal Alignment ◽  
Short Segment
Sign in / Sign up

Export Citation Format

Share Document