A screw-clamp apparatus is disclosed that includes a first clamp component comprising at least one hook, a second clamp component comprising at least one hook, a bone-screw hole located on the first clamp component, a bone screw configured to be inserted through the bone-screw hole and to be inserted into bone and a spacer-receiver located on the first clamp component. The second clamp component can be pivotably attached relative to the first clamp component. A portion of the bone screw can be configured to engage the second clamp component upon insertion to cause the second clamp component to pivot toward the first clamp component. The spacer-receiver can be configured to secure a spacer.