Trabecular deformations during screw pull-out: a micro-CT study of lapine bone.

ABSTRACT: The mechanical fixation of endosseous implants, such as screws, in trabecular bone is challenging because of the complex porous microstructure. Development of new screw designs to improve fracture fixation, especially in high-porosity osteoporotic bone, requires a profound understanding of how the structural system implant/trabeculae interacts when it is subjected to mechanical load. In this study, pull-out tests of screw implants were performed. Screws were first inserted into the trabecular bone of rabbit femurs and then pulled out from the bone inside a computational tomography scanner. The tests were interrupted at certain load steps to acquire 3D images. The images were then analysed with a digital volume correlation technique to estimate deformation and strain fields inside the bone

SUBMITTER: Joffre T 

PROVIDER: S-EPMC5511599 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature