A sterile, implantable device designed to be inserted into the medullary canal of a bone (e.g., femur, tibia, or humerus) during orthopaedic surgery to prevent cement progression in the diaphysis and therefore facilitate cement pressurization during the introduction of an implant. It is typically made of titanium (Ti) and is available in a variety of designs, e.g., straight or tapered, hollow with a fenestrated surface, and it may have a toothed surface to prevent its migration from the desired location. It is not intended for spinal indication.