Facet Translation Analysis in the Lumbar Spine: An Application in Posterior Dynamic Stabilization

2012 ◽  
Author(s):  
Daniel J. Cook ◽  
Matthew S. Yeager ◽  
Boyle C. Cheng
Keyword(s):  
Lumbar Spine ◽  
Measurement Technique ◽  
Healthy Adult ◽  
Surgical Intervention ◽  
Dynamic Stabilization ◽  
Disc Disease ◽  
Human Lumbar Spine ◽  
Translation Analysis ◽  
Posterior Dynamic Stabilization

Facet articulation in the human lumbar spine has not been thoroughly characterized with regard to the effects of degeneration or surgical intervention. Kozanek et al. investigated the translation and rotation of the facets in 11 healthy adult subjects during maximal voluntary bending [1]. Li et al. used the same measurement technique on a cohort of 10 patients with degenerative disc disease (DDD) and found some significant differences in facet motion compared to a cohort of healthy patients [2]. Jegapragasan et al. investigated facet translations in intact lumbar spines in vitro and found the technique of facet translation analysis (FTA) to yield significantly different results compared to a similar analysis based on a vertebral body based coordinate system [3]. This abstract describes the application of this FTA technique in evaluating a posterior dynamic stabilization (PDS) system.

scholarly journals Dynamic Stabilisation in the Treatment of Degenerative Disc Disease with Modic Changes

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Olcay Eser ◽  
Cengiz Gomleksiz ◽  
Mehdi Sasani ◽  
Tunc Oktenoglu ◽  
Ahmet Levent Aydin ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Degenerative Disc Disease ◽  
Dynamic Stabilization ◽  
X Rays ◽  
Disc Disease ◽  
Degenerative Disc ◽  
Vas Score ◽  
Posterior Dynamic Stabilization ◽  
The Mean ◽  
Segmental Lordosis

Objective. Posterior dynamic stabilization is an effective alternative to fusion in the treatment of chronic instability and degenerative disc disease (DDD) of the lumbar spine. This study was undertaken to investigate the efficacy of dynamic stabilization in chronic degenerative disc disease with Modic types 1 and 2. Modic types 1 and 2 degeneration can be painful. Classic approach in such cases is spine fusion. We operated 88 DDD patients with Modic types 1 and 2 via posterior dynamic stabilization. Good results were obtained after 2 years of followup.Methods. A total of 88 DDD patients with Modic types 1 and 2 were selected for this study. The patients were included in the study between 2004 and 2010. All of them were examined with lumbar anteroposterior (AP) and lateral X-rays. Lordosis of the lumbar spine, segmental lordosis, and ratio of the height of the intervertebral disc spaces (IVSs) were measured preoperatively and at 3, 12, and 24 months after surgery. Magnetic resonance imaging (MRI) analysis was carried out, and according to the data obtained, the grade of disc degeneration was classified. The quality of life and pain scores were evaluated by visual analog scale (VAS) score and Oswestry Disability Index (ODI) preoperatively and at 3, 12, and 24 months after surgery. Appropriate statistical method was chosen.Results. The mean 3- and 12-month postoperative IVS ratio was significantly greater than that of the preoperative group (P<0.001). However, the mean 1 and 2 postoperative IVS ratio was not significantly different (P>0.05). Furthermore, the mean preoperative and 1 and 2 postoperative angles of lumbar lordosis and segmental lordosis were not significantly different (P>0.05). The mean VAS score and ODI, 3, 12, and 24 months after surgery, decreased significantly, when compared with the preoperative scores in the groups (P=0.000).Conclusion. Dynamic stabilization in chronic degenerative disc disease with Modic types 1 and 2 was effective.

scholarly journals The Interspinous Spacer: A New Posterior Dynamic Stabilization Concept for Prevention of Adjacent Segment Disease

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Antoine Nachanakian ◽  
Antonios El Helou ◽  
Moussa Alaywan
Keyword(s):  
Lumbar Spine ◽  
Preventive Measure ◽  
Radicular Pain ◽  
Dynamic Stabilization ◽  
Adjacent Segment Disease ◽  
Neurogenic Claudication ◽  
Adjacent Segment ◽  
Disability Score ◽  
Interspinous Spacer ◽  
Posterior Dynamic Stabilization

Introduction. Posterior Dynamic stabilization using the interspinous spacer device is a known to be used as an alternative to rigid fusion in neurogenic claudication patients in the absence of macro instability. Actually, it plays an important in the management of adjacent segment disease in previously fused lumbar spine.Materials and Method. We report our experience with posterior dynamic stabilization using an interspinous spacer. 134 cases performed in our institution between September 2008 and August 2012 with different lumbar spine pathologies. The ages of our patients were between 40 and 72 years, with a mean age of 57 years. After almost 4 years of follow up in our patient and comparing their outcome to our previous serious we found that in some case the interspinous distracter has an important role not only in the treatment of adjacent segment disease but also in its prevention.Results and Discussion. Clinical improvement was noted in ISD-treated patients, with high satisfaction rate. At first, radicular pain improves with more than 3/10 reduction of the mean score on visual analog scale (VAS). In addition, disability score as well as disc height and lordotic angle showed major improvement at 3 to 6 months post operatively. And, no adjacent segment disease was reported in the patient operated with interspinous spacer.Conclusion. The interspinous spacer is safe and efficient modality to be used not only as a treatment of adjacent segment disease but also as a preventive measure in patients necessitating rigid fusion.

Comparison of porcine and human lumbar spine flexion mechanics*

2003 ◽  
Vol 16 (01) ◽  
pp. 44-49 ◽  
Author(s):  
G. A. Dumas ◽  
D. A. Bednar ◽  
J. P. Dickey
Keyword(s):  
Lumbar Spine ◽  
Range Of Motion ◽  
Mechanical Tests ◽  
Neutral Position ◽  
Spinal Fixation ◽  
Potential Health ◽  
Human Lumbar Spine ◽  
Pure Moment ◽  
Low Stiffness

SummaryAnimal models have been proposed as an alternative to human spinal specimens for in vitro mechanical testing due to the limited availability, poor reproducibility, high cost, and potential health risk associated with human specimens. The purpose of this study was to directly compare the flexion biomechanics of porcine and human lumbar spines. We determined the range of motion, laxity zone and the stiffness under pure-moment flexion loading. The porcine and human specimens showed qualitative similarities in mechanical behaviour. However the porcine specimens demonstrated a number of quantitative differences including a less-stiff, more extensive, low-stiffness region around the neutral position and a larger flexion range of motion. The results suggest that the porcine lumbar spine may be a potential model for the human lumbar spine for certain in vitro mechanical tests including comparisons between spinal fixation constructs.

The effect of six degree of freedom loading sequence on the in-vitro compressive properties of human lumbar spine segments

2016 ◽  
Vol 49 (14) ◽  
pp. 3407-3414 ◽  
Author(s):  
D.B. Amin ◽  
I.M. Lawless ◽  
D. Sommerfeld ◽  
R.M. Stanley ◽  
B. Ding ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Degree Of Freedom ◽  
Compressive Properties ◽  
Human Lumbar Spine ◽  
Loading Sequence ◽  
Six Degree Of Freedom

scholarly journals Posterior dynamic stabilization of the lumbar spine with the Accuflex rod system as a stand-alone device: experience in 20 patients with 2-year follow-up

2010 ◽  
Vol 19 (12) ◽  
pp. 2164-2170 ◽  
Author(s):  
Alejandro Reyes-Sánchez ◽  
Barón Zárate-Kalfópulos ◽  
Isabel Ramírez-Mora ◽  
Luis Miguel Rosales-Olivarez ◽  
Armando Alpizar-Aguirre ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Dynamic Stabilization ◽  
Rod System ◽  
Posterior Dynamic Stabilization
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