Bone is composed of a fluid and a solid phase, and remodeling of bone is caused by the continuous interchange of mass between these two phases. Chemical reactions between the solid and fluid phase cause a mass exchange, which is regulated by bone cells. There are several theories about bone remodeling, but most of these theories are based on single phase continuum mechanics approaches. We have used a mixture theory approach to write the equations that govern bone remodeling. We consider bone as a mixture of a linear elastic solid (bone matrix) and a viscous fluid (the nutrient substratum). The purpose of this study was to model the interaction of solid and fluid phase in bone, and its effect on remodeling of the tissue.