Patent ID: 8092466

Claim:
An expandable trial comprising: a first component having resiliently connected first and second side portions forming a slot therebetween, the first component including a recess having an opening with an initial first size; a second component having a shaft with a helical groove thereon, the helical groove adapted to engage a guide pin protruding into the recess of the first component, the shaft of the second component having a cross-sectional area greater than the initial first size of the opening of the recess, the shaft of the second component configured to be received in the recess of the first component when the opening of the recess is expanded to an expanded second size; and at least one third component adapted to at least one of the first and second side portions of the first component such that movement of the at least one third component in a first direction expands the slot of the first component to expand the initial first size of the opening of the recess to the expanded second size greater than the cross-sectional area of the shaft of the second component.