Patent ID: 7435088

Claim:
An arrangement for determining position and fixation of an element in a vertical direction and a transverse direction in relation to a part in or on a bone or a model of a bone, the arrangement comprising: a sleeve comprising an inner surface; an expansion spacer extending through the sleeve and comprising an outer sleeve engaging surface and an inner conical expansion surface, the expansion spacer comprising a first flange configured to engage a first end of the sleeve, the expansion spacer further comprising a second flange configured to engage a second end of the sleeve when the expansion spacer is expanded to vertically fix the expansion spacer with respect to the sleeve; an expansion screw extending through the expansion spacer and comprising an outer conical expansion surface operative to cooperate with the inner conical expansion surface on the expansion spacer to radially expand the expansion spacer causing the outer sleeve engaging surface on the expansion spacer to engage the inner surface of the sleeve, thereby determining the position of the sleeve relative to the part and fixing the sleeve causing the expansion spacer to engage the sleeve, wherein radial expansion of the expansion spacer causes an outer surface of the expansion spacer to be positioned substantially parallel to the inner surface of the sleeve; and an assembly template configured to be arranged in or on the bone or the model of the bone, the assembly template comprising a through hole extending therethrough, wherein the sleeve is arranged in the through hole, and wherein the assembly template comprises yielding or elastic material during its initial production that in a final form of the template assumes a stiffened state.