Feasibility Study And Establishing the Machining Process Parameter for Bio Medical Hip Implant of Titanium Material Using CNC Machine Through Conventional Route

摘要

Hip replacement refers to the process in which a damaged hip joint is surgically replaced with an artificial implant. It has been observed that all implants are not safe for use and some can cause serious complications to patient after surgery. A total hip replacement comprised of replacement of entire hip structure using an artificial prosthesis, during this surgical procedure, a stem is inserted into the patient's femur for stability, and a ball replaces the head of the femur & the socket is also replaced with an artificial cup. The hip implantation was usually cemented in place, but it is also find that some surgeons use a cementless approach instead The hybrid total hip replacement uses a combination of both, implanting the cup without cement and setting the stem in place with cement. So far as the availability of specific prosthesis for specific patients it is very difficult more over the prosthesis which will be available are not properly matching with the patients requirements due to change in morphology of human structure. Hence it is understand that there is a requirement of feasibility study for machining of the prosthesis based on the specific patient's requirements. Considering the above need a network project has been undertaken by CSIR for the development of prosthesis through conventional route. The machining is being carried out by first taking the CT scan data of the patient using MIMICS software, and then this data is being analyzed with suitable load in ANSYS to find out the Stress and strain of this intact femur bone after that the CAD model offemoral stem had been prepared Solid with & without collar, then FEA of femur bone carried out by placement of prosthesis in actual bone by meshing in ANSYS. The result shows that the hollow prosthesis has a better effect than the solid prosthesis as the weight is further reduced and the effect can be further improved by using Ti Alloy as prosthesis material. The machining is being carried out using CNC Machining centre Mikron m/c by preparing the required programme as per the profile of the prosthesis and then the parting operation of the prosthesis is performed using CNC wire cut EDM machine, to get the final prosthesis.