A method of attaching a bone cover or a bone fragment to a skull with a self-retaining implant comprising a support element having a lower side, an extension extending substantially at a right angle from the lower side of the support element to an end remote from the support element and substantially straight between the support element and the end, and at least one spike extending substantially parallel to the support element, wherein the support element includes two support arms extending in opposite directions from the extension with the first of the two support arms defining a screw hole therein for receiving a fastener and the second of the two support arms for cooperating with the bone cover or bone fragment, said method comprising the steps of:
- providing an implant delivery device including a body, a receiving element supported by the body and defining a receiving structure at one end thereof to receive the implant, a driving-in mechanism operative with the receiving element for driving the spike laterally into the bone cover or bone fragment, and an operating mechanism coupled to the body to actuate the driving-in mechanism;
- positioning the implant in the receiving structure of the receiving element;
- actuating the driving-in mechanism and driving the spike laterally into the bone cover or bone fragment;
- positioning the bone cover or bone fragment adjacent to the skull after driving the spike laterally into the bone cover or bone fragment;
- and
- securing the first support arm to the skull after positioning the bone cover or bone fragment adjacent to the skull.