Research On Bone Morphology Of Digital Knee Joint And Prosthesis Design

Most of prosthesis used in Artificial knee joint arthroplasty is designed in reference ofknee joint’s anatomy geometry dimension and its kinematics characteristics and stability afterprosthesis’s implantation, so the study of knee joint’s bone morphology is of greatsignificance to the design of prosthesis. It is an important direction for the design of knee jointprosthesis matched with the anatomical structure of Asian population to measure themorphologic data of distal femur, proximal tibia which osteotomies before and after.The aim of this paper is to measure and research bone morphological data of distal femur,proximal tibia of normal human knee by using digital and Computer Tomography (CT)scanning technology. The knee joint’s digital model database and normal reference values ofthe related parameters will be established, the relationship between data will be explored, andstandardization data of knee will be normalized. On this basis, combined with good conceptand method of prosthesis design, knee prosthesis which is suitable will be designed.Firstly,3D model, femoral and tibial morphological data of knee joint are obtained byCT scanning and3D reconstruction technology, anatomical configuration of knee joint arediscussed and analyzed, and feasible ways for design of total knee arthroplasty(TKA) areexplored. Using CT images,3D model of digital knees is reconstructed by software Mimics10.01, the proximal tibia is positioned, simulated osteotomy, parameters of distal femur andproximal tibia are measured, the results are analyzed by IBM SPSS Statistics19.0. Finally, thedatabase of digital knee model is established, and the related interrelationship of itsparameters has been explored, which provide morphological data for the design of prosthesis.On the basis of the study of bone morphology, considering the kinematics characteristicsof knee joint, the main characteristic parameters of knee joint, the key factors which affect thedesign of artificial joint prosthesis, as well as good concepts and methods of prosthesis design,the structure design of the femoral component, tibia platform component and tibial plateau’sliner are completed by Pro-E.Based on the design of above prosthesis structure, static structure analysis of knee joint’sprosthesis is simulated by application of ANSYS Workbench14. The stress and strain ofprosthesis model with different knee flexion angles are analyzed, the optimization ofprosthesis is completed, and a kind of good method to designing prosthesis is explored.