Featured Publications & Reports

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MD&M 2010 Presentation: Design of Bioactive PEEK Composite Implants

This MD&M Minneapolis presentation by Prof. Ryan Roeder highlights recent investigations in the design of hydroxyapatite (HA) whisker reinforced polyaryletherketone biocomposites. Novel powder processing and compression molding methods enabled the dispersion of high volume fractions of HA reinforcements and the addition of a tailored porosity. Single crystal HA whiskers enabled improved load-transfer from the matrix to reinforcement, resulting in significantly improved static and fatigue properties when directly compared to equiaxed powder reinforcements, and often mimicking the elastic properties cortical and trabecular bone.

MD&M 2010 Presentation: Metal and HA Coating Technologies for PEEK Implants

In order to improve the bone-implant interface, PEEK implants may be coated with Titanium (Ti) or Hydroxyapatite (HA) via Plasma Spray (PS) processes. Coatings characterization was performed by SEM analyses, profilometry and optical image analyses. Basic data as bulk surface covering capability, coating porosity, coating roughness and thickness were collected along with adhesion strength coating-substrate. A properly designed and applied plasma spray process is able to coat PEEK or CFR-PEEK components with potentially improved bone apposition without damaging the substrate’s properties and the coating reliability.

MD&M 2010 Presentation: Material Selection Criteria and Injection Molding of PEEK

This MD&M Minneapolis presentation by Ken Kostecki covers both grade selection and processing of implantable PEEK materials.Numerous physcial, mechanical, and processing requirements, as well as application driven properties must be considered in seleting the proper grade of PEEK. This portion of the presentation identifies these considerations in order to guide those specifying materials to an informative material decision. The second part of the presentation provides an overview of key PEEK processing considerations that will help guide those producing implantable PEEK components around common pitfalls, and will aide in successful manufacturing.

MD&M 2010 Presentation: FDA Approach to Preclinical Testing

This MD&M Minneapolis presentation by Jonathan Peck discusses the role of non-clinical testing in the medical device clearance/approval process at FDA. More specifically, the talk will attempt to cover some of the general pros and cons of bench testing, animal testing, and modeling (FEA). Relevant to PEEK, the topic of material selection and the 522 order on motion preserving spine implants are covered in the talk.

Self-Initiated Surface Grafting with PMPC on PEEK

Researchers from Japan have synthesized an antibiofouling and highly hydrophilic high-density nanometer-scaled layer on the surface of PEEK by photo-induced graft polymerization of 2-methacryloyloxyethyl phosphorylcholine (MPC) without using any photo-initiators, i.e., "self-initiated surface graft polymerization." The results indicated that the diphenylketone moiety in the polymer backbone acted as a photo-initiator similar to benzophenone. This photo-induced polymerization process occurs only on the surface of the PEEK substrate; therefore, the desirable mechanical properties of PEEK would be maintained irrespective of the treatment used.

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