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Enhanced patient safety by computational Modelling from clinically available X-rays to minimise the risk of overload and instability for optimised function and joint Longevity (MXL)
Start date: Jan 1, 2010, End date: Dec 31, 2012 PROJECT  FINISHED 

Osteorthritis (OA) is a disabling disease, affecting the joints of 40% or more of the population over 60, resulting in a socioeconomic burden of €7b. per year in Germany alone. Joint surgery attempts to address the various disease stages, to either minimize the risk of early degeneration of the native joint, or to replace a fully degenerated joint, with well over 1,000,000 surgeries performed annually in the EU. Adequate joint function and longevity are the most important factors that define success, yet at least 10% of reconstructions fail within 10 years of surgery, and a large fraction of native joints progresses to early OA. The ensuing revision surgery is not only painful and stressful for the patient but also costly for the health care providers. Joint failure is a consequence of inadequate competence of the patient's musculoskeletal system, joint overload and instability, or their combination. Currently, surgeons rely on 2D static radiographs and their experience to plan the procedure. To prevent failures and improve outcome, key facts on the mechanical conditions of the joint need to be available to the surgeon. By implementing refined image reconstruction, biomechanical modelling and analysis tools, MXL will make the dynamic joint loading and stability accessible for the planning of joint surgery in every case. Based on this technology, MXL safeguards the patient by supporting the surgeon to decide when to operate, which procedure to use, and which key aspects to address to reduce the failure rate and improve the functional outcome of joint surgery. Therefore, we will develop an ICT based planning environment that provides the surgeon with quantitative information on the patient's anatomy, the competence of the soft and hard tissues, and integrates them within biomechanical models to arrive at an optimal strategy for joint surgery. This will result in a breakthrough with tremendous effects on patient safety and the return of function and joint longevity.

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