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

P42. Posterior Dynamic Stabilization of the Lumbar Spine with the Accuflex Rod System as a Stand-Alone Device. Experience in 20 Patients with Two Year Follow-Up

2009 ◽  
Vol 9 (10) ◽  
pp. 135S-136S
Author(s):  
Alejandro Reyes Sanchez ◽  
Barón Zárate-Kalfópulos ◽  
Luis Miguel Rosales-Olivarez ◽  
Isabel Ramirez-Mora ◽  
Armando Alpizar-Aguirre ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Dynamic Stabilization ◽  
Rod System ◽  
Posterior Dynamic Stabilization

scholarly journals Posterior dynamic stabilization of the lumbar spine: pedicle-based stabilization with the AccuFlex rod system

2007 ◽  
Vol 22 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Christopher E. Mandigo ◽  
Prakash Sampath ◽  
Michael G. Kaiser
Keyword(s):  
Lumbar Spine ◽  
Short Form ◽  
Limited Range ◽  
Dynamic Stabilization ◽  
Limited Range Of Motion ◽  
Disease Information ◽  
Rod System ◽  
Posterior Dynamic Stabilization ◽  
Rigid Rod ◽  
The Impact

✓Posterior dynamic stabilization in the lumbar spine is performed in an attempt to reduce loading across the intervertebral disc for the purpose of relieving pain and limiting degeneration while preserving motion. The AccuFlex rod system (Globus Medical, Inc.), a first-generation device, achieves this by changing the properties of the rod within the Protex pedicle screw–based rigid rod system. Helical cuts that have been created in the standard 6.5-mm rod allow for a limited range of motion while providing a posterior tension band that relieves a significant amount of disc loading. The AccuFlex rod system has been approved by the Food and Drug Administration for single-level fusion when used in conjunction with an interbody graft. In a study involving 170 patients who underwent fusion surgery for back pain, the 54 who received the AccuFlex construct had statistically similar fusion rates and outcomes (as assessed by visual analog scale and Short Form-16 scores) when compared with 116 patients treated with rigid rod fixation after 1 year of follow up. Future clinical studies will examine and provide information regarding the impact of AccuFlex on the incidence of adjacent-level disease. Information gained through the clinical experience with AccuFlex will serve as a foundation for the development of a stand-alone dynamic construct.

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.

Nonfusion stabilization of the degenerative lumbar spine

2011 ◽  
Vol 15 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Alberto Maleci ◽  
Rafael Donatus Sambale ◽  
Michele Schiavone ◽  
Franz Lamp ◽  
Fahir Özer ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Donor Site ◽  
Visual Analog Scale Score ◽  
Clinical Results ◽  
Degenerative Disease ◽  
Operative Trauma ◽  
Implant Complications ◽  
Rod System ◽  
Adjacent Disc

Object The goal of this study was to assess whether a stable but nonrigid nonfusion implant can stabilize the spine in degenerative diseases and also prevent instability following decompression. Instrumented spondylodesis is a recognized surgical treatment in degenerative disease of the lumbar spine. However, pain can develop at the bone graft donor site and the operative trauma can be very stressful in elderly patients, and it is suspected that there may be increased degenerative changes in the adjacent segments. In 2002, a nonrigid but rotationally stable pedicle screw and rod system was introduced, which could be used without additional fusion (referred to hereafter as the Cosmic system). Methods A total of 139 patients with degenerative disease of the lumbar spine underwent spinal stabilization with the Cosmic system without additional spondylodesis. Seventy patients had an additional decompression. The minimum follow-up was 2 years. The perioperative course, the clinical results, and the erect anteroposterior and lateral radiographs were recorded and compared with the preoperative data. The data were obtained from 6 different spine centers in Europe and documented on an Internet platform. Results The Oswestry Disability Index score improved from 48.9% to 22.5%, and the visual analog scale score decreased from 7.3 to 2.5. Lumbar lordosis did not change, nor did the adjacent disc height. Eleven patients underwent revision, 4 of them for implant failure. Of the 139 patients, 110 assessed the result as excellent, very good, or good; 24 as fair; and 5 as poor. A total of 122 patients would undergo surgery again. There were no significant differences between patients with or without an additional decompression. Conclusions The Cosmic system is a stable but nonrigid posterior nonfusion system. Implant complications are low and the clinical outcome is good. Longer follow-up is necessary to confirm the 2-year results.

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.

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