COMPUTATIONAL MODELING OF ADAPTATIVE HIP GUIDE FOR PERIACETABULAR OSTEOTOMY SURGERY
Fabiane Grazielle Silva1; Flávia de Souza Bastos1; Bruno Gonçalves Schroder e Souza1; Alexandre da Silva Scari1
1 Universidade Federal de Juiz de Fora
doi:10.20906/CPS/CILAMCE2017-0827
Resumo
Arthrosis is a progressive and irreversible condition where there is loss of joint cartilage causing pain and, in some cases, deformity, especially in joints with weight, such as the hip joint. From the social and economic point, the impacts are enormous, since the arthrosis reduces the quality of life of the affected patients and their treatment involves procedures with great cost. In this context, the study of three-dimensional modeling is the key to the development of methodologies to help in the prevention and correction of joint pathologies. In this work, a computational modeling of the adaptive hip guide was developed. First, a guide was created from the 3D (three dimensional) model of the patient's hip bone. Meshmixer specific tools were used and a bone surface negative was created with the shape and dimensions of the guide. This guide has complex and irrgular geometry. To reduce computational cost a new geometry was created in Abaqus for finite element analisys. To simulate the surgeon's eccentric hammering during the periacetabular osteotomy, rotations were imposed on the cutting chisel which generated different stress distributions, with maximum values up to 225,5 MPa and minimum values close to 0 MPa. With the preliminary computational 3D modeling complete, it is be possible to perform finite elements analisys of the surgical procedure and determine the maximun rotation angle of the chisel that the guide supports.
Palavras-chave: arthrosis; three-dimensional modeling; ABS plastic; stress distribution; 3D printer