Improved design of sagittal femoral condylar geometry using TRIZ

To make artificial knee joints have lower long-term wear rate, a new method for reformed design of sagittal femoral condylar geometry based on TRIZ (Theory of Inventive Problem Solving) was proposed. Firstly, according to the development history of sagittal femoral condylar geometry and evolution theory of TRIZ, future state of the evolution line of femoral condylar geometry in sagittal plane was predicted. And then, solving principles of technical conflicts were used to propose improved solution of femoral condylar geometry in sagittal plane. The result obtained shows that reformed femoral condylar geometry can improve motion smoothness, low long-term wear rate and increase survival lifetime of artificial knee joint.