Recent efforts are currently focusing on how design features, such as notches included in hip and knee implants to improve fixation and kinematic stability, affect crack growth. This work derives from several retrieval studies recently published by our lab and collaborators in which stress concentrations played a key role in the failure of UHMWPE components. Ultimately this work seeks to further our knowledge of the role that microstructure, environment, and design plays on crack growth in UHMWPE.
Atwood, S. A., Van Citters, D. W., Patten, E. W., Furmanski, J., Ries, M. D., & Pruitt, L. A. (2011). Tradeoffs amongst fatigue, wear, and oxidation resistance of cross-linked ultra-high molecular weight polyethylene. Journal of the Mechanical Behavior of Biomedical Materials, 4(7), 1033-1045.
Pruitt, L. A., Ansari, F., Kury, M., Mehdizah, A., Patten, E. W., Huddlestein, J., … & Ries, M. D. (2013). Clinical trade-offs in cross-linked ultrahigh-molecular-weight polyethylene used in total joint arthroplasty. Journal of Biomedical Materials Research Part B: Applied Biomaterials. 101B (3), 476-484.
Ansari, F., Chang, J., Huddleston III, J., Van Citters, D., Ries, M., & Pruitt, L. (2013). Fractography and oxidative analysis of gamma inert sterilized posterior-stabilized tibial insert post fractures: Report of two cases. The Knee, 20 (6), 609-613.