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Design and Manufacture of Hip Joint Simulator

Dehghani, David | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45854 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Movahhedy, Mohammad Reza; Farahmand, Farzam
  7. Abstract:
  8. Human joints wear gradually by diseases like arthrosis and will fail. The Pain from joint erode, preventing tracking daily activities, wont disappear by medicines and joint replacement is a common treatment. Hip joint as one of the most important, largest and heaviest joints of the body,is no exception.
    Over 600,000 worldwide annual hip replacement surgery is done. The joints are designed in such a way that it can move 15 years without significant wear. Different materials such as ceramics, polymers and metals are used in making it which before in vivo use, itmust succeed many tests like wear test.
    Since making artificial joints become increasingly important in recent years and manyIranian efforts in this area have beendone, validation and their practical applications require devices that can test implants according to standards and their clinical applications have been approved. One of these essential instruments, is artificial hip joint simulator that foreign examples are available.
    The main purposeof this research is to design and build an artificial hip joint test machine with four degrees of freedom that testing of the implant in the country will be achieved. Due to the high cost of these devices, as well as the unavailability of foreign equipment in Iran, we have tried to design it in a way quite innovative and with low cost. This device simulates walking and exercising in three degrees of freedom that consist angular movement of flexion, abduction, and Rotation, with a periodic applied stress, without using servo mechanism, using a three-phase asynchronous motors, capable of simulation the walking cycle that is repeated five million steps. To validate the machine, we made a detailed sample of the acetabulum bowl and the femoral head andtested them with our simulator
  9. Keywords:
  10. Artificial Joint ; Wear Test ; Hip Implant ; Wear Testing Machine ; Artificial Joint Construction

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