A dynamic spine stabilization component suitable for use in stabilizing of the spine. In a preferred embodiment, the device has a disk-shaped stop for limiting entry of the piercing element into the vial. The the presence of an object is automatically detected within the object detection field by sensing object sensing energy reflected off the object. All the necessary foundation materials can be combined in a simple and compact kit which can be shipped to a customer. In one embodiment, a guidewire-accepting fitting is attached to a distal portion of the device and permits advancement of the device over a guidewire until a desired location along the guidewire is reached. The first microphone is attached to the first layer of the circuit board.