Monoaxial vs. Polyaxial Percutaneous Hybrid Stabilization
Starting soon · Not applicable
Conditions studied: Thoracolumbar, Fractures in the Elderly
In brief
Vertebral body fractures in older adults mostly affect the thoracolumbar junction and are challenging to treat due to osteoporosis and other comorbidities. Treatment options range from conservative approaches to minimally invasive procedures like vertebroplasty or balloon kyphoplasty, as well as surgical techniques such as posterior or combined stabilization. A common method for more severe fractures (from OF3 onwards) is percutaneous bisegmental hybrid stabilization using cement-augmented pedicle screws and balloon kyphoplasty. Polyaxial screws are easier to implant but offer less biomechanical stability. In contrast, monoaxial screws provide greater stiffness, allowing better correction of kyphosis and restoration of vertebral body height. The study compares radiological and clinical outcomes in patients aged 60 and older with thoracolumbar fractures (T11-L4) between monoaxial and polyaxial hybrid stabilization. The primary goal is to evaluate and compare the degree of kyphosis correction six months after surgery.
Key facts
- Study ID
- NCT07408726
- Run by
- Medical University Innsbruck
- People needed
- 44
- Starts
- 2026-05-01
- Expected to finish
- 2028-11-01
- Last updated by the study team
- 2026-04-09
Who can join
Age: 60 and older. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- Patient-related criteria:
- Age ≥ 60 years (male and female patients)
- Ability to understand nature, risks, and benefits of study participation and to provide written informed consent.
- Psychosocially, mentally, and physically capable of complying with all study requirements, including scheduled follow-up visits, completion of forms, and participation in all procedures as defined by the protocol.
- Ambulatory prior to fracture, with or without the use of assistive devices
- Fracture-related criteria:
- Acute vertebral fractures located between T11 and L4 (inclusive)
- Fractures deemed suitable for bisegmental hybrid stabilization based on clinical and radiological assessment - primarily OF type 3 and type 4 fractures according to DGOU classification; type 2 and 5 fractures may also be included based on individual evaluation, with the final treatment decision left to the discretion of the treating surgeon.
You may not qualify if…
- Patient-related criteria:
- Body mass index (BMI) > 35
- Permanent or progressive neurologic deficits (including upper motor neuron disease and myelopathy)
- Rheumatoid arthritis or known disorders of bone metabolism (excluding osteopenia/osteoporosis, Vitamin D deficiency)
- History of radiation therapy to the spine
- History of alcohol or drug abuse within the last 2 years prior to randomization
- Current therapy with high-dose systemic corticosteroids (e.g., >10 mg/day prednisone equivalent for more than 3 months)
- Ongoing or planned treatment with cytotoxic chemotherapy (excluding biologicals, immunotherapy, or targeted agents) at the time of enrollment
- Known allergy to any component of the spinal instrumentation
- Participation in other clinical investigations (drug or device) that may interfere with the outcomes of this study
- Fracture-related criteria:
- Vertebral fractures associated with neurological deficits
- Fracture age > 4 weeks at the time of enrollment
- Pathological fractures due to spinal infection or metastatic bone disease
- Planned major spinal surgery within 12 months of enrollment
- Severe spinal deformities or fusion at the index or adjacent segments
- Previous spinal surgery involving the index or adjacent vertebrae, with the exception of minor non-instrumented procedures, such as simple sequestrectomies or decompressions
Full record on ClinicalTrials.gov
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