title: Tensor-resolved Raman spectroscopic analysis of wear-induced residual stress fields in long-term alumina hip-joint retrievals.
abstract: Polarized Raman spectroscopy was applied to evaluate the full set of stress tensor components in the wear-induced residual stress fields on two long-term (>20 y) (monolithic) alumina (Al2O3) femoral head retrievals coupled to polyethylene liners. The tensor-resolved residual stress state stored onto the Al2O3ceramic head surface was found to retain "memory" of the sliding conditions in vivo and of the wear-induced consumption of the polyethylene counterpart. The evolution of tensor-resolved residual stress motifs in the three-dimensional space was examined, and key features, including exceptionally high shear stresses in one case, were uncovered. The effect of such a body of concurrent complications and malfunctioning are neither easily reproducible by in vitro simulations nor obviously obtainable through merely computational approaches. It is demonstrated here that our latest developments of Raman spectroscopic algorithms could contribute to link the joint performance with the micromechanical features that occur in real in vivo situations.
authors.affiliation: Department of Medical Engineering for Treatment of Bone and Joint Disorders, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0854, Japan.
authors.forename: Wenliang
authors.initials: W
authors.lastname: Zhu
authors.affiliation: Kyoto Institute of Technology, Ceramic Physics Laboratory and Research Institute for Nanoscience, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan.
authors.forename: Elia
authors.initials: E
authors.lastname: Marin
authors.affiliation: Department of Medical Engineering for Treatment of Bone and Joint Disorders, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0854, Japan. Electronic address: n-sugano@umin.ac.jp.
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Sugano
authors.affiliation: Kyoto Institute of Technology, Ceramic Physics Laboratory and Research Institute for Nanoscience, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan. Electronic address: pezzotti@kit.ac.jp.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Pezzotti
mesh_terms: D000537:Aluminum Oxide; D019644:Arthroplasty, Replacement, Hip; D002516:Ceramics; D006621:Hip Joint; D006622:Hip Prosthesis; D008422:Materials Testing; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013059:Spectrum Analysis, Raman
chemical_list: D020959:Polyethylene; D000537:Aluminum Oxide
keywords: Raman spectroscopy; alumina femoral head; long term retrievals; residual stress