Patent ID: 8216320

Claim:
A device for use in surgery, comprising: a body including a proximal portion and a distal portion, the proximal portion having a post projecting therefrom and the distal portion extending from the proximal portion in a distal direction along a longitudinal axis, the distal portion including a first arm and a second arm and a bone-engaging surface having a portion extending along the first arm and a portion extending along the second arm, the first and second arms being moveable with respect to one another, the body further including a cavity formed therein so as to extend through the proximal portion and into the distal portion; and a driver adapted for sliding engagement within the cavity of the body such that movement of the driver causes movement of the first and second arms from a first position, wherein a first line extending in the distal direction along the portion of the bone engaging surface on the first arm and a second line extending in the distal direction along the portion of the bone engaging surface on the second arm form an angle therebetween having an apex spaced from the body in the distal direction, to a fully extended second position, wherein the first line and the second line are substantially parallel; wherein the bone engaging surface is shaped so as to form a substantially cylindrical shape when the first and second arms are in the second position, and wherein a cross-section of the distal portion perpendicular to the longitudinal axis substantially defines a circle when the first and second arms are in the second position, the cross-section being non-circular when the first and second arms are in the first position.