Post Marketing Study of MagnetOs Easypack Putty Standalone Compared to Demineralized Bone Matrix or Fibers Mixed with Autograft in Patients Undergoing Posterolateral Lumbar Fusion
- Conditions
- Degenerative Disc DiseaseSpine FusionBack Pain
- Interventions
- Device: Demineralized Bone Matrix mixed with Autograft BoneDevice: MagnetOs Putty
- Registration Number
- NCT04679844
- Lead Sponsor
- Kuros Biosurgery AG
- Brief Summary
This is a phase IV post-marketing study for MagnetOs Easypack Putty. MagnetOs Easypack 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 Easypack Putty will be used according to the latest U.S. Instructions For Use, standalone in the posterolateral spine.
- Detailed Description
In this study, following a screening period of a maximum of 30 days, 60 patients will undergo up to two-level instrumented posterolateral fusion (PLF) procedure. Prior to surgery, each patient will be randomized to receive MagnetOs Easypack Putty standalone on the assigned side of the spine and Demineralized Bone Matrix or Fibers mixed with local 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 30 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 Easypack Putty will be applied according to the latest Instructions for Use approved in the United States. Specifically, MagnetOs Easypack Putty will be used standalone in patients up to two-level degenerative disc disease with segmental mechanical spinal instability requiring treatment 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, Discharge, Month 3, Month 6 and Month 12. CT scans will only be obtained at Month 6 and Month 12.
Recruitment & Eligibility
- Status
- RECRUITING
- Sex
- All
- Target Recruitment
- 60
- 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 (if the patient undergoes elective surgery). Patients who have spinal instability (as defined above in inclusion criteria number three), caused by acute trauma requiring urgent surgical treatment are excluded from this criterion.
- 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, history of or active Pott's disease, stage >4 renal disease 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.
- 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 & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Demineralized Bone Matrix mixed with Autograft Bone Demineralized Bone Matrix mixed with Autograft Bone Interventions * Procedure: Instrumented posterolateral spine fusion * Device: Demineralized Bone Matrix mixed with Autograft Bone MagnetOs Putty MagnetOs Putty Interventions * Procedure: Instrumented posterolateral spine fusion * Device; MagnetOs Putty
- Primary Outcome Measures
Name Time Method Radiographic Fusion by CT Scan 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.
- Secondary Outcome Measures
Name Time Method Radiographic Fusion by Plain Radiographs Month 6, Month 12 The rate of posterolateral lumbar/thoracolumbar fusion assessed by plain radiographs.
Radiographic Fusion by CT Scan 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.
Functional Outcome by Oswestry Disability Index Questionnaire Screening, 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.
Back and Leg Pain by Visual Analog Pain Scale Questionnaire Screening, Week 2, Month 3, 6, and 12 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.
Neurologic Status by Physical Exam Screening, Week 2, Month 3, 6, and 12 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.
Success Rate Week 2, Month 3, 6, and 12 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.
Trial Locations
- Locations (2)
Tennessee Orthopaedic Alliance
🇺🇸Nashville, Tennessee, United States
University of Washington
🇺🇸Seattle, Washington, United States