A clamp comprises a first structure configured to exert force on a first bony structure at a first point of contact, a second structure configured to exert force on a second bony structure at a second point of contact, a spacer pivot positionable between the first and second bony structures and comprising a pivot point offset in an anterior (or posterior) direction relative to a line between the first and second points of contact when (i) the first structure is deployed to engage the first bony structure and (ii) the second structure is deployed to engage the second bony structure. The clamp may include a clamping structure, adjusting a distance between the first and second structures, and preferably also connecting the spacer pivot. The deployed spacer pivot is operatively connected to the first and second structures when the first and second structures are deployed.
