척추성형술의 유한요소 모델링을 이용한 생체역학적 연구
(The) Biomechanical study of Vertebroplasty using Finite Element Analysis
척추성형술 유한요소모델링 생체역학;
- 원문 URL
Vertebroplasty is a minimal invasive procedure to stabilize the vertebra with osteoporotic compressed fracture by addition of bone cement and had has recently been practiced. However, the optimal volume and distribution of bone cement in vertebral body to restore strength and stiffness of damaged bone has not been fully investigated in both clinical and experimental studies with its own limitations. Also, previous works with finite element analysis have drawbacks in their simplified models regarding to geometry of vertebral body and with material properties of bone. This study is to provide the sufficient quantitative data of mechanical properties of vertebral body before and after vertebroplasty, using the three dimensional finite element modeling, to establish the ideal vertebroplasty. After Young's modules equation in the axial load direction was achieved by cadaveric study, the finite element modeling of the T12 vertebral body was generated using MEDISURF and IMAGEWARE SURFACER software. The specimens were loaded in uniaxial compression and analyzed by ABAQUS software under matching condition to reveal that the single central distribution of bone cement might be more effective than bilateral one. The finite element analysis enabled parameters such as cement volume and distribution to be controlled in a manner that would not be possible with experimental or animal models and model itself was highly anatomically detailed, with geometric and material properties derived from CT scan.