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Polyetheretherketone as a biomaterial for spinal applications
Jeffrey M Toth1, Mei Wang, Bradley T Estes
1Department of Orthopaedic Surgery, Medical College of Wisconsin, 9200 W. Wisconsin Ave., Box 26099, Milwaukee, WI 53226-0099, USA. jtoth@mcw.edu
Biomaterials
|August 24, 2005
Summary
Polyetheretherketone (PEEK) interbody fusion devices show promise for spinal fusion, offering effective radiographic and histologic fusion with minimal inflammation. These PEEK cages may be a viable alternative to titanium for lumbar interbody fusion procedures.
Area of Science:
- Biomaterials Science
- Spinal Surgery
- Orthopedic Research
Background:
- Titanium threaded lumbar interbody fusion devices (TIBFD) demonstrate high efficacy but face challenges in radiographic fusion assessment.
- Evaluating alternative biomaterials for interbody fusion is crucial for improving surgical outcomes and diagnostic clarity.
Purpose of the Study:
- To assess the efficacy and safety of radiolucent polyetheretherketone (PEEK)-threaded interbody fusion devices in a sheep model.
- To compare PEEK cages packed with autograft versus rhBMP-2 on a collagen sponge for lumbar interbody fusion.
Main Methods:
- A blinded study involving 13 sheep evaluated PEEK interbody fusion devices using radiographic, biomechanic, and histologic analyses at 6 months.
- Devices were packed with either autograft or recombinant human bone morphogenetic protein-2 (rhBMP-2) on an absorbable collagen sponge.
Main Results:
- PEEK cages demonstrated successful radiographic and histologic fusion, alongside increased spinal level biomechanical stiffness.
- No significant device degradation or wear debris was observed, with only mild chronic inflammation noted.
- Polyetheretherketone (PEEK) showed potential as a biomaterial for interbody fusion cages due to its radiolucency and lower stiffness.
Conclusions:
- Radiolucent PEEK interbody fusion devices are effective for lumbar interbody fusion in a sheep model.
- PEEK offers advantages in radiolucency and biomechanical properties compared to traditional titanium devices.
- Further investigation into PEEK biomaterials for spinal fusion applications is warranted.