Overview of Pedicle Screw-Based Posterior Dynamic Stabilization Systems

2010 ◽  
pp. 221-226
Author(s):  
Richard D. Guyer ◽  
Donna D. Ohnmeiss ◽  
Kevin R. Strauss
Keyword(s):  
Pedicle Screw ◽  
Dynamic Stabilization ◽  
Posterior Dynamic Stabilization

scholarly journals Pedicle Screw-Based Posterior Dynamic Stabilization: Literature Review

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Dilip K. Sengupta ◽  
Harry N. Herkowitz
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Surgical Treatment ◽  
Pedicle Screw ◽  
Clinical Evidence ◽  
Dynamic Stabilization ◽  
Low Back ◽  
Design Rationale ◽  
Clinical Instability ◽  
Posterior Dynamic Stabilization

Posterior dynamic stabilization (PDS) indicates motion preservation devices that are aimed for surgical treatment of activity related mechanical low back pain. A large number of such devices have been introduced during the last 2 decades, without biomechanical design rationale, or clinical evidence of efficacy to address back pain. Implant failure is the commonest complication, which has resulted in withdrawal of some of the PDS devices from the market. In this paper the authors presented the current understanding of clinical instability of lumbar motions segment, proposed a classification, and described the clinical experience of the pedicle screw-based posterior dynamic stabilization devices.

scholarly journals Durability and Biological Response of a New Posterior Dynamic Stabilization System Using Polyethylene with Vitamin E

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Koji Matsumoto ◽  
Yasuaki Tokuhashi
Keyword(s):  
Vitamin E ◽  
Pedicle Screw ◽  
Inflammatory Cell ◽  
Facet Joint ◽  
Biological Response ◽  
Dynamic Stabilization ◽  
Inflammatory Cell Infiltration ◽  
Stabilization System ◽  
Sliding Surface ◽  
Posterior Dynamic Stabilization

Objective. The purpose of this study was to evaluate the durability and biological response of a new Posterior Dynamic Stabilization system using polyethylene with vitamin E on the sliding surface. Summary of Background Data. The use of polyethylene with vitamin E on the sliding surface in Posterior Dynamic Stabilization has not been reported previously. Methods. A developed pedicle screw-based Posterior Dynamic system consists of four parts: a set screw, a rod, a ball, and a pedicle screw. The rod is inserted into the through hole of the ball, and the ball is sandwiched by the set screw. (1) Fatigue Wear Test. Testing was conducted under a dynamic compressive load of 50N at a speed of 1 Hz for 1 million cycles. We examined the loss of polyethylene due to abrasion in 3 units. (2) Biological Response in Pigs. In two pigs, a new pedicle screw and a conventional pedicle screw were inserted in L2 and L3/4, and L4 and L2/3, respectively. After breeding for 6 months, autopsies were performed. CT imaging was used to evaluate bone union of the facet joint. Abrasive specimens were prepared, and abrasion powder and inflammatory cell infiltration were evaluated microscopically. Results. The average loss of polyethylene due to abrasion was -0.01 mg. In all units, polyethylene showed a decrease of 0.1 mm or less at the contact point with the set screw. The facet joints between the conventional screws exhibited bone fusion, but the facet joint between the conventional and the new screw retained mobility with no bony fusion. No abrasion powder was found and inflammatory cell infiltration was only minimally observed. Conclusion. The new Posterior Dynamic Stabilization system exhibited a high level of durability and biological safety.

scholarly journals Evaluation of Effect of Posterior Dynamic Stabilization IntraSPIN System on Sagittal Spinal Balance using EOS® X-Ray Imaging System

2017 ◽  
Vol 08 (04) ◽  
Author(s):  
Simona Bistazzoni ◽  
Michelangelo De Angelis ◽  
Manuela D ercole ◽  
Carmela Chiaramonte ◽  
Antonio Carotenuto ◽  
...  
Keyword(s):  
Imaging System ◽  
Dynamic Stabilization ◽  
Spinal Balance ◽  
X Ray ◽  
X Ray Imaging ◽  
Posterior Dynamic Stabilization ◽  
Sagittal Spinal Balance

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.

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