ABSTRACT
The purpose of this work is to describe the specific physical and modeling considerations that make poroelasticity an effective and useful model for deformation-driven bone fluid movement in bone tissue. The application of poroelasticity to bone differs from its application to soft tissues in two important ways. First, the deformations of bone are small while those of soft tissues are generally large. Second, the bulk compressibility of the mineralized bone matrix is about six times stiffer than that of the fluid in the pores while the bulk compressibilities of the soft tissue matrix and the pore water are almost the same. Bone fluid poroelasticity is similar to rock poroelasticity, particularly to that of granites and marble, in terms of the values of material parameters. A two-porosity poroelasticity is described here to answer a number of questions concerning bone mineralization and the bone mechanosensory system.
