System and method for force, displacement, and rate control of shaped memory material implants

摘要

An energy delivery device controls the transformation of the microstructure of shape memory material. A surgeon can use the energy delivery device to control the rate of implant shape change, the extent of implant shape change, as well as the force exerted on the surrounding tissue. The energy delivery device allows for the fine control of force when fixating osteoporotic bone and rate of bone transport when working near the spinal cord. The energy delivery device models or measures the heating profile of the implant and provides the surgeon a method to control the extent of microstructure phase transformation so that the rate, force or extent of implant shape change can be controlled individually or together. The invention is an implant controlled with an energy delivery device that transforms the microstructure of a shape memory material through heat generation in the implant. The implant is manufactured so that the energy delivery device achieves an implant temperature that controls the conversion of the microstructure for one of a plurality of members.