- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04679844
Post Marketing Study of MagnetOs Putty Compared to Demineralized Bone Matrix (DBM) Mixed With Autograft in Patients Undergoing Posterolateral Lumbar Fusion (PROOF)
A Prospective, Randomized, Multi-Center Study to Assess the Safety and Performance of MagnetOs Putty Compared to Demineralized Bone Matrix Mixed With Autograft in Patients Undergoing One to Two-Level Instrumented Posterolateral Lumbar/Thoracolumbar Fusion (PLF)
This is a phase IV post-marketing study for MagnetOs Putty. MagnetOs Putty is a synthetic bone graft extender product that is routinely used by surgeons as a treatment for patients with degenerative disc disease or spinal trauma undergoing spinal fusion surgery.
In this study, MagnetOs Putty will be used according to the latest U.S. Instructions For Use, specifically as a bone graft extender mixed with autograft in a 1:1 vol.% in the posterolateral spine.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
In this study, following a screening period of a maximum of 30 days, 30 patients will undergo up to two-level instrumented posterolateral fusion (PLF) procedure. Prior to surgery, each patient will be randomized to receive MagnetOs Putty on the assigned side of the spine and demineralized bone matrix mixed with autograft bone on the other at the diseased levels. They will be followed up at discharge, Week 2, Month 3, Month 6, and Month 12. An interim analysis will be performed once 15 patients have completed their Month 6 visit and have measurements for the endpoints available to measure effectiveness. The primary endpoint will be analyzed at Month 12.
In this study, MagnetOs Putty will be applied according to the latest Instructions for Use approved in the United States. Specifically, MagnetOs Putty will be used as a bone graft extender mixed with autograft in a 1:1 vol.% in patients up to two-level degenerative disc disease with up to grade 1 spondylolisthesis requiring treatment or spinal trauma with an instrumented posterolateral spine fusion procedure. The fusion procedure (PLF) will be left to the surgeon's discretion.
Radiographs will be obtained at Screening, Day 0, Month 3, Month 6 and Month 12. CT scans will only be obtained at Month 6 and Month 12.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Cesar Silva, MD
- Phone Number: 9702156793
- Email: Cesar.silva@kurosbio.com
Study Contact Backup
- Name: Katherine Sage, DO
- Phone Number: 617 285 2489
- Email: Katherine.Sage@kurosbio.com
Study Locations
-
-
New Jersey
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Pennington, New Jersey, United States, 08534
- Rothman Orthopaedic Institute
-
-
Washington
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Seattle, Washington, United States, 98104
- University of Washington
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Patient is able to read/be read, understand, and provide written informed consent and has signed the Institutional Review Board (IRB) approved informed consent.
- Male or female patient ≥ 18 years old.
- Patients with segmental mechanical spinal instability requiring arthrodesis surgery.
Instability can be either caused by degenerative disc disease or by traumatic injury to the spinal column. Patient requiring a maximum of two-level instrumented posterolateral lumbar/thoraco-lumbar fusion (T11 - S1) will be enrolled. Mechanical instability is defined by the presence of one or more of the following:
- instability (angulation ≥ 5 degrees or translation ≥ 3 mm on flexion/extension radiographs),
- decreased disc height by > 2 mm, but dependent upon the spinal level
- Grade II or more listhesis
- TLICS equal or greater than 5
Unstable burst fracture
- Failed conservative treatment (physical therapy, bed rest, medications, spinal injections, manipulations, or transcutaneous electrical nerve stimulation) for a minimum period of 3 months prior to study enrollment.
Exclusion Criteria:
- Requires > two-level fusion or expected to need secondary intervention within one year following surgery.
- Had prior PLF fusion or attempted PLF fusion at the involved levels.
- Had previous decompression at the involved levels.
- Women who are or intend to become pregnant within the next 12 months.
- To treat conditions in which general bone grafting is not advisable.
- In conditions where the surgical site may be subjected to excessive impact or stresses, including those beyond the load strength of fixation hardware (e.g. defect site stabilization is not possible).
- In case of significant vascular impairment proximal to the graft site.
- In case of severe metabolic or systemic bone disorders (e.g., osteogenesis imperfecta or Paget's Disease) that affect bone or wound healing.
- In case of acute and chronic infections in the operated area (soft tissue infections; inflammation, bacterial bone diseases; osteomyelitis).
- When intraoperative soft tissue coverage is not planned or possible.
- Undergoing any procedure that allows MagnetOs to come in direct contact with the articular space.
- Receiving treatment with medication interfering with calcium metabolism.
- Has degenerative disc disease (DDD) related to a benign or malignant tumor.
- Has history or presence of active malignancy.
- Has known substance abuse, psychiatric disorder, or a condition which, in the opinion of the investigator, may influence the healing or ability to comply with protocol requirements.
- Is involved in active litigation relating to his/her spinal condition.
- Has participated in an investigational study within 30 days prior to surgery for study devices.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: MagnetOs Putty
Interventions
|
MagnetOs Putty use in instrumented posterolateral fusion, 5cc-10cc mixed with autograft bone in a 1:1 ratio per spine level at the randomized assigned side.
|
Active Comparator: Demineralized Bone Matrix mixed with Autograft Bone
Interventions
|
Demineralized Bone Matrix mixed with Autologous bone graft used in instrumented posterolateral fusion, 5cc-10cc per level mixed with bone marrow aspirate/blood per spine level at the contralateral side.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Radiographic Fusion by CT Scan
Time Frame: Month 12
|
The rate of posterolateral lumbar/thoracolumbar fusion assessed by CT-scan at Month 12. Radiographic as determined by evidence of bridging trabeculae or continuous bony connection between the superior and inferior transverse processes.
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Month 12
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Radiographic Fusion by CT Scan
Time Frame: Month 6
|
The rate of posterolateral lumbar/thoracolumbar fusion assessed by CT-scan at Month 6. Radiographic as determined by evidence of bridging trabeculae or continuous bony connection between the superior and inferior transverse processes.
|
Month 6
|
Radiographic Fusion by Plain Radiographs
Time Frame: Month 6, Month 12
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The rate of posterolateral lumbar/thoracolumbar fusion assessed by plain radiographs.
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Month 6, Month 12
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Functional Outcome by Oswestry Disability Index Questionnaire
Time Frame: Week 2, Month 3, 6, and 12
|
Functional outcome by the Oswestry Disability Index questionnaire.
Patient-completed questionnaire which gives a subjective percentage score of level of function (disability) in activities of daily living in those rehabilitating from low back pain.
The lower the percentage the higher the patient's functionality.
0-20% minimal disability, 80-100% significant disability or bedridden.
|
Week 2, Month 3, 6, and 12
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Back and Leg Pain by Visual Analog Pain Scale Questionnaire
Time Frame: Week 2, Month 3, 6, and 12
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Change in back and leg pain using Visual Analog Pain Scale (0-100).
Patient-completed questionnaire scoring pain by using 100 mm line.
Zero being no pain, 100 is worst pain imaginable.
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Week 2, Month 3, 6, and 12
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Neurologic Status by Physical Exam
Time Frame: Week 2, Month 3, 6, and 12
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Change in neurologic status by examination to document stable, improved, or deficits in condition.
Stable or improved findings for lower extremities, specifically reflexes, muscle strength, sensory, and straight leg raise.
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Week 2, Month 3, 6, and 12
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Success Rate
Time Frame: Week 2, Month 3, 6, and 12
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Number of patients with secondary surgical interventions (SSI's) such as revisions, re-operations, removals, supplemental fixations, or any other procedure that adjusts or removes part of the original implant configuration with or without replacement of the components within 12 months of surgery.
|
Week 2, Month 3, 6, and 12
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Safety Endpoint - number of patients with Serious Adverse Events
Time Frame: 12 Months
|
The number of patients with Serious Adverse Events from Screening up to Month 12 after surgery
|
12 Months
|
Safety Endpoint - number of patients with Adverse Events
Time Frame: 12 Months
|
The number of patients with Adverse Events from Screening up to Month 12 after surgery.
|
12 Months
|
Safety Endpoint - number of patients with Adverse Device Effects
Time Frame: 12 Months
|
The number of patients with Adverse Device Effects from Screening up to Month 12 after surgery.
|
12 Months
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Safety Endpoint - number of patients with Device Related Complications
Time Frame: 12 Months
|
The number of patients with any complications considered to device related with 12 months after surgery.
|
12 Months
|
Health Economic - Duration of Surgery
Time Frame: 12 Months
|
Duration of surgery in minutes.
|
12 Months
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Health Economic - Duration of Hospitalization
Time Frame: 12 Months
|
Duration of hospital stay in days.
|
12 Months
|
Health Economic - Return to Work
Time Frame: 12 Months
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Time to return to work in days.
|
12 Months
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Katherine Sage, DO, Kuros BioSciences B.V.
Study record dates
Study Major Dates
Study Start (Estimated)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- MAG-920-023
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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