In the present invention some embodiments, a medical device for handling the bone arthroplasty, such as spinal compression fracture. More particularly, embodiments of the present invention relates to apparatus and method for adjustably recover vertebral body height by adjusting the geometry of the filler material to be guided to the cancellous bone. System 100, for adjusting the add a force caused by the inflow of geometric shapes, and filling material 120 of the filling material 120, so as to polymerize the inflow surface of the jet stream 165, combined with the conductive bone filler material 120 use the Rf energy on to. In another embodiment, a method of treating a bone, a step of injecting the filling material 120 of a certain amount of bone, and the selection of bone filler material 120 so as to regulate the direction of flow of the filler material 120 within the bone 90 and a step of selectively varying the viscosity of the parts. The method also includes the step of adjusting at least one flow parameter of the flow of bone filler material 120. System 100, the filling material so as to change guidance apparatus 110A that carries the filling material 120 into the bone 90, and 110B, the guide device 110A, the viscosity of the filling material 120 as it flows from 110B treating bone using this method 120 and an energy source 125A is selectively coupleable.