Design and Investigation of Hinge with Inter-rolling Double-action Customized Semi-knee Artificial Prosthesis

The semi-knee prosthetic femoral condyle will cause wear and tear of the tibial plateau.A new type of double-action customized semi-knee artificial prosthesis which based on a computer-aided design(CAD) and advanced machinery manufacturing technology is designed for alleviating this problem,and the prosthesis to carry out in vitro experimental study.Mimics /Geomagic /Pro-E,such as software engineering technology at the core of the line,learned from the design principle of bipolar artificial head,the internal structure of the double-action is designed in the semi-knee prosthetic femoral condyle.Produceed the metal prosthetic entity through the advanced machinery technology,observated the dynamic X-ray in the vitro knee for the three groups which is the normal knee,double-action customized semi-knee artificial prosthesis and total knee prosthesis,then compared the study respectively.It is resultsed that the internal structure of the double-action prosthesis can effectively reduce the friction frequency between the prosthesis and tibia plateau.The double-action semi-knee prosthesis's movement mode is closer than the total knee prosthesis to the normal knee joint.Conclused that kind of prostheses is non-restricted and reduced the wear and tear between the prosthesis and tibial plateau,at the same time retained the epiphyseal growth of one side of the knee,inject new vitality in the concept of knee-replacement.It just need to customized the articular surface of the prosthesis individually,other parts of the prosthesis is standard prefabricate,so that will help reduce the custom cycle to ensure the quality and reduce the costs.