History of Changes for Study: NCT00878579
Percutaneous Dynamic Stabilization (PDS) System Versus Fusion for Treating Degenerative Disc Disease
Latest version (submitted February 19, 2013) on
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Study Record Versions
Version A B Submitted Date Changes
1 April 8, 2009 None (earliest Version on record)
2 April 23, 2009 Contacts/Locations and Study Status
3 May 26, 2009 Study Status and Contacts/Locations
4 July 22, 2009 Study Status and Contacts/Locations
5 February 26, 2010 Contacts/Locations, Study Status, Arms and Interventions and Sponsor/Collaborators
6 April 25, 2012 Recruitment Status, Study Status, Sponsor/Collaborators and Contacts/Locations
7 February 19, 2013 Recruitment Status, Study Status and Study Design
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Study NCT00878579
Submitted Date:  April 8, 2009 (v1)

Open or close this module Study Identification
Unique Protocol ID: PDS-002-DDD
Brief Title: Percutaneous Dynamic Stabilization (PDS) System Versus Fusion for Treating Degenerative Disc Disease
Official Title: A Study to Evaluate the Safety and Effectiveness of the PDS System to Treat Back Pain Associated With Degenerative Disc Disease
Secondary IDs:
Open or close this module Study Status
Record Verification: April 2009
Overall Status: Recruiting
Study Start: March 2009
Primary Completion: June 2010 [Anticipated]
Study Completion:
First Submitted: April 7, 2009
First Submitted that
Met QC Criteria:
April 8, 2009
First Posted: April 9, 2009 [Estimate]
Last Update Submitted that
Met QC Criteria:
April 8, 2009
Last Update Posted: April 9, 2009 [Estimate]
Open or close this module Sponsor/Collaborators
Sponsor: Interventional Spine, Inc.
Responsible Party:
Open or close this module Oversight
U.S. FDA-regulated Drug:
U.S. FDA-regulated Device:
Data Monitoring: No
Open or close this module Study Description
Brief Summary: The objective of this study is to evaluate the safety and effectiveness of the PDS System compared to the surgical control of posterolateral fusion with autograft and pedicle screw fixation for the treatment of one or two levels from L3-S1 to relieve back pain associated with degenerative disc disease.
Detailed Description:
Open or close this module Conditions
Conditions: Lumbar Degenerative Disc Disease
Keywords: back pain
Lower back pain
Lumbar Pain
Degenerative Disc Disease
Open or close this module Study Design
Study Type: Interventional
Primary Purpose: Treatment
Study Phase: Phase 2
Interventional Study Model: Parallel Assignment
Number of Arms: 2
Masking: None (Open Label)
Allocation: Randomized
Enrollment: 292 [Anticipated]
Open or close this module Arms and Interventions
Arms Assigned Interventions
Experimental: PDS System Device: PDS System
Percutaneous Dynamic Stabilization System
Active Comparator: Fusion Device: Fusion
Posterolateral Fusion with Autograft and Pedicle Screws
Open or close this module Outcome Measures
Primary Outcome Measures:
1. Improvement in Oswestry Disability Index (ODI)
[ Time Frame: 2 Years ]

Open or close this module Eligibility
Minimum Age: 18 Years
Maximum Age: 70 Years
Sex: All
Gender Based:
Accepts Healthy Volunteers: No

Inclusion Criteria:

  1. Confirmation of DDD (back pain with degeneration of the disc by patient history, physical exam, and radiographic studies and with one or more of the following factors:
    • Osteophyte formation of facet joints or vertebral endplates
    • Facet joint degeneration (no more than mild to moderate)
    • Subjects with ≤50% collapse of disc as compared to the adjacent level
    • Subjects with or without a contained herniated nucleus pulposus <5 mm and no free fragment
  2. Skeletally mature subjects aged between 18 and 70 years of age inclusive.
  3. Subjects with primarily back pain associated with degenerative disc disease of the lumbar spine at one level or two adjacent levels from L3 through S1. Subjects may have a lesser degree of leg pain at the same level(s).
  4. Subjects who require surgical or minimally invasive intervention, who have failed to adequately improve following 6 months of non-operative therapy.
  5. Subject is a surgical candidate for a posterior approach to the lumbar spine and is suitable for fusion using pedicle screw systems
  6. Subjects with a minimum baseline Oswestry Score of 40% (20/50).
  7. Subjects with a minimum baseline VAS Score of 40/100 mm.
  8. MRI diagnostic for DDD within 3 months of the screening visit.
  9. Subjects who are mentally, physically and psychosocially able to cooperate with the study procedures and return for all required follow-up visits.
  10. Subjects who are able to understand this study and have given voluntary, written informed consent to participate in this study.

Exclusion Criteria:

  1. Subjects who have leg pain greater than back pain.
  2. Subjects with severe facet degeneration, radiographic findings of severe facet joint disease, degeneration or misshapen facet(s) or structural anomalies at the target level(s) that would preclude placement of the PDS device or pedicle screw systems.
  3. Subjects who require a pedicle screw smaller than 4.5 mm.
  4. Subjects with Modic 3 bone changes at the target level(s).
  5. Spondylolisthesis > Grade 1 and/or spondylolysis at the target level(s).
  6. Subjects with myelopathy or cauda equina syndrome, defined as neural compression causing neurogenic bowel (rectal incontinence) or bladder dysfunction (retention or incontinence).
  7. Subjects with fixed motor deficit and/or peripheral neuropathy.
  8. Subjects with prior discectomy at the target level(s).
  9. Subjects with prior spine surgery, trauma, metastatic disease, or spinal deformity due to scoliosis (Cobb angle > 15 degrees) or kyphosis (> 11 degrees) at any lumbar level.
  10. Subjects who have used any investigational drug or device within the past 30 days or have had an experimental spinal implant at any time.
  11. Subjects with active local or systemic infection.
  12. Subjects with osteoporosis. A screening questionnaire for osteoporosis, SCORE (Simple Calculated Osteoporosis Risk Estimation), will be used to screen subjects. If DEXA is required, exclusion will be defined as a DEXA bone density measured T scored < -1.0.
  13. Subjects with metabolic bone disease (e.g. osteomalacia, Paget's disease).
  14. Subjects with rheumatoid arthritis or other autoimmune spondyloarthropathies.
  15. Subjects with a systemic disease that compromises life expectancy (e.g. HIV, AIDS, hepatitis) or are on immuno-suppressive agents.
  16. Subjects who are taking any drug known to potentially interfere with bony/soft tissue healing, (e.g., steroids at any dose daily within the last 12 months).
  17. Subjects with active malignancy: A subject with a history of any invasive malignancy (except non-melanoma skin cancer), unless s/he has been treated with curative intent and there have been no clinical signs or symptoms of malignancy for at least 5 years.
  18. Subjects with a known allergy to titanium and/or polycarbonate urethane (PCU).
  19. Subjects who have existing conditions or pending litigation claims that could compromise their participation, follow-up care, or treatment outcomes (e.g., drug or alcohol abuse).
  20. Subjects with a BMI of ≥ 40 kg/m2 or weight > 275 pounds (125 kg).
  21. Subjects who are pregnant or are planning a pregnancy during the study period.
  22. Subjects who are prisoners.
Open or close this module Contacts/Locations
Central Contact Person: Bita P Ghadimi
Locations: United States, California
Los Angeles, California, United States
Open or close this module IPDSharing
Plan to Share IPD:
Open or close this module References
Available IPD/Information:

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U.S. National Library of Medicine | U.S. National Institutes of Health | U.S. Department of Health & Human Services