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A Pivotal Study of the Premia Spine TOPS™ System

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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03012776
Recruitment Status : Recruiting
First Posted : January 6, 2017
Last Update Posted : May 21, 2019
Information provided by (Responsible Party):
Premia Spine

Tracking Information
First Submitted Date  ICMJE January 4, 2017
First Posted Date  ICMJE January 6, 2017
Last Update Posted Date May 21, 2019
Study Start Date  ICMJE January 2017
Estimated Primary Completion Date September 2020   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: January 5, 2017)
  • Improvement in Oswestry Disability Index (ODI) [ Time Frame: 24 months ]
  • Maintenance or improvement in Neurological status as assessed by a standard neurological exam performed by Investigator [ Time Frame: 24 months ]
  • No epidural steroid injection, facet joint injection, nerve block, or placement of spinal cord stimulator [ Time Frame: 24 months ]
  • No subsequent surgical intervention [ Time Frame: 24 months ]
  • Radiographic confirmation of fusion in control arm and non-fusion in the TOPS arm [ Time Frame: 24 months ]
  • Absence of any major device related adverse event [ Time Frame: 24 months ]
Original Primary Outcome Measures  ICMJE Same as current
Change History Complete list of historical versions of study NCT03012776 on Archive Site
Current Secondary Outcome Measures  ICMJE
 (submitted: January 5, 2017)
  • Greater range-of-motion through flexion-extension [ Time Frame: 24 months ]
  • Improvement (20 mm) in visual analogue scale (VAS) for back pain and worst leg [ Time Frame: 24 months ]
  • Reduction in physical component score on SF-12 [ Time Frame: 24 months ]
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE A Pivotal Study of the Premia Spine TOPS™ System
Official Title  ICMJE A Clinical Study to Assess the Safety and Effectiveness of the Premia Spine TOPS™ System
Brief Summary

The purpose of this trial is to assess whether the Total Posterior Spine System (TOPS System) is more effective than transforaminal lumbar interbody fusion (TLIF) when used to stabilize a single lumbar level (L2 - L5) following surgical decompression in patients diagnosed with (1) at least moderate lumbar spinal stenosis, and (2) Grade 1 spondylolisthesis (or retrolisthesis), and (3) thickening of the ligamentum flavum or scarring of the facet joint capsule.

Success will be assessed by means of a composite endpoint that measures improvement in in patient reported outcomes and the absence of any major device related complications.

Detailed Description

Degenerative spine disease is a normal part of the aging process and can cause pain and significantly limit normal movement. The most commonly diagnosed condition is Lumbar Spinal Stenosis (LSS) which presents with pain, and often weakness or numbness in the buttocks and/or lower extremities that is worsened with standing and walking. For patients that do not respond to conservative treatment decompressive surgery is indicated. When LSS is accompanied by a diagnosis of degenerative spondylolisthesis, fusion of the affected segment is often added to prevent progression of the instability that may accompany the removal of bony elements as part of the decompression. While decompression and fusion have been shown to significantly improve patient outcomes, when compared to decompression alone, fusion has been associated with several comorbidities such as adjacent level degeneration and pseudoarthrosis.

The TOPS System was designed as an alternative to fusion and is a motion preserving posterior spine implant designed to provide dynamic stabilization to a single lumbar spine segment following decompression surgery.

Patients meeting all of the entry criteria will be randomized (2:1) to receive either the TOPS System or TLIF following decompression surgery. Patients will be followed for 5 years and the composite primary endpoint will be assessed at 2 years following index surgery.

Study Type  ICMJE Interventional
Study Phase  ICMJE Not Applicable
Study Design  ICMJE Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Condition  ICMJE
  • Lumbar Spinal Stenosis
  • Degenerative Spondylolisthesis
Intervention  ICMJE
  • Device: Total Posterior Spine System (TOPS)
    Placement of TOPS System to provide posterior stabilization following decompression to treat lumbar spinal stenosis and spondylolisthesis
  • Procedure: Transforaminal Lumbar Interbody Fusion (TLIF)
    Fusion with placement of interbody cage and posterolateral instrumentation
Study Arms  ICMJE
  • Experimental: TOPS System
    Investigational surgical treatment using TOPS System
    Intervention: Device: Total Posterior Spine System (TOPS)
  • Active Comparator: Transforaminal Lumbar Interbody Fusion (TLIF)
    Control surgical treatment using interbody fusion and placement of posterolateral instrumentation
    Intervention: Procedure: Transforaminal Lumbar Interbody Fusion (TLIF)
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Recruiting
Estimated Enrollment  ICMJE
 (submitted: January 5, 2017)
Original Estimated Enrollment  ICMJE Same as current
Estimated Study Completion Date  ICMJE September 2023
Estimated Primary Completion Date September 2020   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • Be between 35 and 80 years of age;
  • Must demonstrate at a single level to be treated (L2/3, L3/4 or L4/5) all three of the following;

    1. Degenerative spondylolisthesis or retrolisthesis up to Grade I, as determined by the investigator based on flexion/extension X-rays,
    2. At least moderate lumbar spinal stenosis, defined as at least a 25% reduction in either the central canal, the lateral recess space, and/or the foramen when compared to an adjacent level, as determined by the investigator based on MRI,
    3. Thickening of the ligamentum flavum and/or scarring of the facet joint capsule as identified by the investigator based on MRI.
  • Have had at least six (6) months of failed conservative treatment prior to surgery (e.g., physical therapy, use of anti-inflammatory medications at maximum recommended dosage; administration of epidural/facet injections and/or nerve block);
  • Have an Oswestry Disability Index (ODI) score of at least 40/100 at baseline;
  • Have leg pain with a VAS score of at least 40/100 for at least one leg at baseline ;
  • Lower back pain with a VAS score of at least 10 points less than Worst Leg VAS score;
  • Neurogenic claudication (as defined by worsening leg pain when walking or standing, which is reduced when sitting or bending forward);

Exclusion Criteria:

  • Presence of free fragment disc herniation at the index level or either adjacent level;
  • Less than 4mm of disc height at the index level;
  • Spondylolisthesis greater than Grade I;
  • Back or non-radicular leg pain of unknown etiology;
  • Stenosis caused by an extruded spinal disc fragment (e.g., herniation) or where the etiology is considered to be congenital, iatrogenic, post-traumatic, or metabolic;
  • Known allergy or sensitivity to PEEK, titanium, cobalt chrome, and/or polyurethane;
  • Prior surgery at any lumbar vertebral level with instrumentation;
  • Prior surgery at the index or adjacent lumbar vertebral level;
  • Clinically compromised vertebral bodies at the affected level;
  • Scoliosis greater than ten (10) degrees by major Cobb angle;
  • BMI > 40;
  • Osteoporosis;
  • Paget's disease, gout, osteomalacia, osteogenesis imperfecta, thyroid and/or parathyroid gland disorder and/or other metabolic bone disease;
  • Active infection - systemic or local;
  • Active hepatitis;
  • AIDS, HIV, Rheumatoid arthritis or other autoimmune disease;
  • Tuberculosis - active or in the past 3 years;
  • Active malignancy;
  • Any medical condition requiring treatment with any drug known to potentially interfere with bone/soft tissue healing or receiving radiation therapy that is expected to continue for the duration of the study;
  • Cauda equina syndrome or neurogenic bowel/bladder dysfunction;
  • Vascular claudication due to severe arterial insufficiency of the legs;
  • Sustained pathologic lumbar fractures of the vertebra or multiple lumbar fractures of the vertebra or hip;
  • Significant peripheral neuropathy causing decreased sensation in a stocking-like or non-radicular and non-dermatomal distribution in the lower extremities;
  • Insulin-dependent diabetes mellitus;
  • Immunologically suppressed, receiving steroids > 1 month out of the past year;
  • Current chemical/alcohol dependency;
  • Current smoker or user of tobacco products;
  • Pregnant or interested in becoming pregnant;
  • Currently involved in active spinal litigation;
  • Currently having a workman's compensation claim;
  • Currently incarcerated;
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 35 Years to 80 Years   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE
Contact: Jeff V Withrow
Listed Location Countries  ICMJE United States
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT03012776
Other Study ID Numbers  ICMJE CL-2830 - US IDE
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE
Plan to Share IPD: Undecided
Responsible Party Premia Spine
Study Sponsor  ICMJE Premia Spine
Collaborators  ICMJE Not Provided
Investigators  ICMJE Not Provided
PRS Account Premia Spine
Verification Date May 2019

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP