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

    • Reference:
    • Roeder, R. Design of Bioactive PEEK Composite Implants. Presented at the 2010 MD&M Meeting in Minneapolis, MN, October 12, 2010.
    • Keywords:
    • PEEK, PEKK, Composites, HA
    • Permissions:
    • The PDF of the conference handouts are made available on with the permission of the author.

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The addition of calcium phosphates (such as hydroxyapatite, beta-tricalcium phosphate, etc.) to bioinert polymers (such as polyethylene and polyarylethereketones) offers a robust system to engineer implant biomaterials with tailored mechanical, biological and surgical function. The historical design rationale has been to reinforce a tough, biocompatible polymer matrix with a rigid, bioactive filler. The effects of the polymer composition and molecular orientation; the reinforcement/polymer interface; and the reinforcement content, morphology, preferred orientation and size will be reviewed with respect to mechanical properties, drawing frequent comparisons between various bioactive composites and bone tissue. Recent investigations in the design of hydroxyapatite (HA) whisker reinforced polyaryletherketone biocomposites are highlighted. 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.


Prof. Ryan K. Roeder, Associate Professor, University of Notre Dame

Ryan K. Roeder has B.S. and Ph.D. degrees in Materials Engineering from Purdue University in 1994 and 1999, respectively. After Purdue, Ryan completed a two year post-doctoral research appointment in the Department of Orthopaedic Surgery at the Indiana University Medical Center. Ryan has been a faculty member in the Department of Aerospace and Mechanical Engineering and Bioengineering Graduate Program at the University of Notre Dame since 2001. He teaches courses on biomaterials, failure of materials, mechanical behavior of materials, manufacturing processes for materials and solid mechanics. His research activities have been supported by the National Institutes of Health, the U.S. Army Peer-Reviewed Medical Research Program, the National Science Foundation, the Centers for Disease Control and Prevention, the Indiana 21st Century Fund, and private corporations. He has published over 40 papers in peer-reviewed journals and 3 patents.