Abstract It is assumed that the surface aspects of bone remodeling is governed, at least in part, by the piezoelectric polarization produced when the bone is deformed. Bone is considered homogenious and anisotropic with a material axis of symmetry. The model presented is based on four postulates: 1. 1. The signal for surface remodeling is the piezoelectric polarization vector normal to the surface. 2. 2. The material symmetry direction of new bone deposited follows the direction of the bone on which it is growing. 3. 3. New surface bone is deposited so that no residual stresses result. 4. 4. The material symmetry direction tries to keep aligned with the time average of the principal stress directions in the bone. The postulates are justified from experimental and clinical observations on bone remodeling and the piezoelectric properties of bone.