Featured Publications & Reports

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2008 WBC Conference Poster: Preliminary Investigation of Implantable PEEK Fiber

This preliminary study examines whether PEEK-OPTIMA could be processed at an industrially relevant scale into a fiber form. A further goal was to also examine if the fiber would possess some of the suitable mechanical and cytocompatible properties beneficial for textile based medical devices. PEEK monofilaments were manufactured at 50 and 100μm diameter. Mechanical properties were comparable to the commonly used PET. Excellent cytocompatibilty was observed. This study demonstrates that PEEK-OPTIMA can be processed into mono and multifilaments, suitable for use in a variety of textile technologies.

2008 WBC Conference Poster: Preliminary Investigation of Implantable Porous PEEK

This preliminary study screens whether a porous prototype form could possess some of the suitable mechanical and physical properties beneficial for medical devices requiring some tissue in-growth. Mechanical properties, porosity, and cytocompatibility were evaluated. The results of these initial studies showed that porous PEEK materials could be manufactured with mechanical and physical characteristics suitable for some orthopedic applications. Further development is ongoing to evaluate industrial suitability.

2008 WBC Poster Presentation: Polymer Solutions for Improving Treatment in Radiotherapy

Researchers from the ErasmusMC-University Medical Center in Rotterdam have investigated PEEK-OPTIMA in various compositions with radiopaque filler materials to develop a new fiducial marker for use in radiotherapy that is visible on xray, CT and MRI imaging, but does not produce undesired artefacts. Nonmetallic markers reduced artefacts on CT. Researchers concluded that the use of the new PEEK fiducial markers offers the best chance to improve treatment accuracy in radiotherapy.

2008 WBC Conference Poster: Laser Welding of PEEK-OPTIMA for Medical Devices

Researchers have developed a direct laser welding process for joining PEEK-Optima parts for medical devices. The joint design must be optimized to produce hermetic joints. Sections of PEEK greater than 1 mm are not amenable to tranmission laser welding because the high crystallinity scatters the laser light. Cylindrical parts are spun in a specialized rig under inert gas during the welding process. Hermetic welds were produced with 10s of weld time.

2008 WBC Conference Poster: Tensile Fracture Behavior in the Presence of a Notch Riser

The objective of this study was to investigate the fracture surfaces produced by uniaxial tensile fracture of medical grade PEEK with and without the presence of a stress concentration. Spine and orthopedic components contain stress-risers, thus it is of interest to determine the notch sensitivity behavior of PEEK. The polymer demonstrated significant notch sensitivity (reduction in fracture stress) in tension and a transition from ductile to brittle fracture micromechanisms.

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