Posterior Lateral Fusion (PLF) With Dynesys

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00791180
Recruitment Status : Completed
First Posted : November 14, 2008
Last Update Posted : September 29, 2011
Information provided by (Responsible Party):
Zimmer Biomet

November 13, 2008
November 14, 2008
September 29, 2011
March 2006
March 2011   (Final data collection date for primary outcome measure)
Clinical Outcomes [ Time Frame: Pre-op, Surgery, 3 month, 6 month, 12 months and 24 months ]
Same as current
Complete list of historical versions of study NCT00791180 on Archive Site
Surgical Outcomes [ Time Frame: Pre-op, Surgery, 3 months, 6 months, 12 months and 24 months ]
Same as current
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Posterior Lateral Fusion (PLF) With Dynesys
Clinical Outcomes Following Posterior Lateral Fusion With the Dynesys(R) Spinal System
The primary purpose of this study is to track and document the clinical outcomes of patients with radicular pathology following posterior lateral fusion with the Dynesys Spinal System. Secondary purpose of this study is to assess outcomes with historical controls along a continuum of motion and anatomy sparing procedures.
This study will help the patient to the extent that it will allow the comparison of this unique treatment to the corpus of literature on radicular pathology, thus focusing a specific treatment for a specific pathology.
Observational Model: Cohort
Time Perspective: Prospective
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Non-Probability Sample
Clinical outcomes following postierior lateral fusion with the Dynesys(R) Spinal System
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
March 2011
March 2011   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Spondylolisthesis of less than Grade II at the index level (degenerative with intact pars)
  • Will receive a decompression for lumbar stenosis
  • Symptoms of leg and/or back pain
  • One pathological level
  • Between the ages of 20 and 80 at the time of surgery
  • Non-responsive to non-surgical treatment for at least six months

Exclusion Criteria:

  • Osteolytic spondylolisthesis
  • Planned complete facetectomy
  • Two or more pathological levels (and as enumerated int he Dynesys Spinal system instructions for use)
  • Use in the cervical spine
  • Active systemic or local infection
  • Extreme obesity as defined by a Body Mass Index (BMI)over 40. BMI calculated using Appendix A, adapted from the National Heart, Lung, and Blood Institute, Clinical Guidelines on the Identification, Evaluation, and Treatment of Overweight and Obesity in Adults.
  • Pregnancy
  • Mental illness
  • Severe osteoporosis or osteopenia. The World Health Organization defines osteoporosis as BMD<-2.5t. Professional discretion should be used and if bone quality is in question a DEXA scan is recommended.
  • Sensitivities/allergy to metals, polymers, polyethylene, polycarbonate urethane and polyethylene terephthalate
  • Alcohol or drug abuse
  • Patient unwilling or unable to follow postoperative instructions
  • Soft tissue deficit not allowing sound closure
  • Any medical or physical condition that would preclude the potential benefit of spinal surgery
  • Inadequate pedicles of the lumbar or sacral vertebrae; congenital abnormalities, tumors or other conditions that would prevent secure component fixation that has the potential to decrease the useful life of othe devices;
  • Any medical or mental condition which would exclude the patient at high risk from surgery of the severity
Sexes Eligible for Study: All
20 Years to 80 Years   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
United States
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Zimmer Biomet
Zimmer Biomet
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Study Director: Jozef Murar, M.D. Zimmer Spine
Zimmer Biomet
September 2011