The way how piezoelectric properties of bone affect the bone modeling process and how the electric stimulation can be used as a therapy in bone fracture healing and repair are described in this work.The Boundary Element Method(BEM)for piezoelectric materials,considering the bone density into the governing equations,is used.The electric potential due the effect of the mechanical loading and why the reabsorption process occurs in zones with positive charge while the negative charge is associated to bone formation.It can be concluded that the absence of mechanical stresses have impact in the absence of electric potential and,at the same time,the bone modeling process does not occur,leading to a loss in bone density and its capacity of regeneration.