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  • PhD vacancies at the University of Southampton

    Please find below details of three PhD positions available within the
    Bioengineering Science Reseach Group at the University of Southampton.

    1. PHD PROJECT - EU APPLICANTS ONLY: PROBABILISTIC FINITE ELEMENT
    ANALYSIS OF SHORT STEMMED FEMORAL COMPONENTS OF TOTAL HIP REPLACEMENT.

    The Finite Element (FE) Method remains the method of choice to conduct
    stress analyses of hip implants and an important tool for the prediction
    of implant behaviour and its subsequent performance optimisation.
    High-Fidelity FE models can now be produced and
    manipulated from CT scans and parameter variation analyses can be
    conducted to gain preliminary understandings of the effects of
    individual input parameters on output stresses. However, there is a
    great deal of uncertainty and variability associated with the
    environment in which a total hip replacement is required to function,
    the material properties of the construct components, their alignments,
    geometries and boundary conditions. These factors have the potential to
    induce high stresses in and around the
    interfaces of the implanted construct. In general, studies have
    demonstrated that the degree of uncertainty in most FE models can give
    rise to widely varying results. One way to address this problem is to
    conduct statistical analyses that would take into account the
    uncertainty and variability associated with the relevant parameters
    instead of conventional deterministic analyses. Previous work at the
    University of Southampton has
    provided a grounding in the application of probabilistic techniques to
    cement and cement/implant interface integrity in the replaced hip. The
    factors most likely to affect their integrity have been predicted using
    a series of increasingly complex models. The proposed work will analyse
    the structural integrity of a novel short stem cementless prosthesis. In
    particular the affect of surgical will be addressed to provide a more
    informed description of, for example, the allowable tolerances in
    implant positioning during surgery.

    2. PHD PROJECT - EU APPLICANTS ONLY: PROBABILISTIC FINITE ELEMENT
    ANALYSIS OF THE PERFORMANCE OF TOTAL KNEE REPLACEMENT

    Clinical studies have shown that the kinematics of total knee
    replacements are highly variable and this may have consequences for the
    longer term performance. The kinematics are dependent on a number of
    parameters, including the design of the knee replacement, the placement
    and orientation of the prosthetic components and the laxity of the
    surrounding soft tissues. We have developed sophisticated models
    capable of simultaneously predicting the kinematics and stresses during
    every day activities.
    However, our models do not account for the inherent variability present
    between patients and in surgical technique. The objective of this
    project is to couple probabilistic techniques with numerical techniques
    in an effort to determine the performance envelop of different designs
    of total knee replacement.

    3. ENGINEERING DOCTORATE PROJECT- UK APPLICANTS ONLY: EVALUATION OF
    NOVEL CARBON-NANOTUBE CONTAINING BONE CEMENTS

    Since the discovery of multi-walled carbon nanotubes (MWCNTs) in 1991,
    followed by the synthesis of single-walled carbon nanotubes (SWCNTs) in
    1994, a number of experimental and theoretical studies documenting their
    remarkable chemical, electronic and mechanical properties have appeared
    in the literature. Such outstanding material properties have led to the
    expectation that by reinforcing polymers, metals or ceramics with CNTs
    it may be possible to engineer a new class of lightweight,
    multifunctional
    composites, as has been demonstrated in several polymer systems. These
    new materials could offer exceptional mechanical properties,
    significantly higher damping capacity than traditional viscoelastic
    polymers, and the possibility of imparting inbuilt sensing and actuating
    capabilities. It has further been shown that CNTs may offer valuable
    bio-functionality, with potential applications in neurological probes
    and structural bone cements being reported.

    The proposed project will encompass several packages, namely:

    Materials Characterisation of standard medical grade and CNT containing
    bone cements
    Comparison of basic structural characteristics of cements
    Bio-compatibility studies
    Multi-scale modelling of CNT loaded cement
    Whole implanted construct investigations

    This programme is therefore expected to form a strong interdisciplinary
    basis for further evaluation and exploitation of structural applications
    of CNT-polymer systems.

    The programme will be run under the Engineering Doctorate scheme,
    further details of which can be found at:
    http://www.soton.ac.uk/~geotech/EngD/ and will involve direct
    collaboration with a UK based orthopaedics company, Finsbury
    Orthopaedics.


    Further details about the School of Engineering Sciences, Postgraduate
    Research at
    Southampton and an application form can be found at:


    http://www.soton.ac.uk/SESPostgraduate/PGResearch/

    Alternatively, application forms can be obtained from Ms Julia Zimbler
    at the address below.
    The closing dates for receipt of completed application forms are 31st
    August 2005 for the PhD Studentships and 19th August for the Engineering
    Doctorate.
    It is anticipated that successful applicants will commence their studies
    on or around the 1 October 2005.

    Julia Zimbler,
    Postgraduate Admissions,
    School of Engineering Sciences,
    University of Southampton,
    Highfield,
    Southampton,
    SO17 1BJ,
    UK

    Tel: +44-(0)2380-593389,
    Fax: +44-(0)2380-595167,
    email: jfz@soton.ac.uk

    Kind regards,

    Mark

    Prof. Mark Taylor
    Professor of Bioengineering Science

    Join the 16th Annual Meeting of the European Orthopaedic Research
    Society (EORS) in Bologna, 2006.
    www.ior.it/eors06


    Bioengineering Sciences Research Group
    School of Engineering Science
    University of Southampton
    Highfield
    Southampton
    SO17 1BJ
    UK

    Tel: ++ 44 (0)2380 597660
    Mobile: ++ 44 (0)7939 101019
    Fax: ++ 44 (0)2380 593230

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