A stabilization apparatus for reaming bone elements includes an outer sleeve having support rod apertures. Support rods are configured to extend through the support rod apertures and into one or more bone elements to secure the outer sleeve to the bone elements. An inner sleeve is movable axially into the outer sleeve, and rotationally relative to the outer sleeve, when the outer sleeve is secured to the bone elements by the support rods. The apparatus further includes means for releasably blocking movement of the inner sleeve axially out of the outer sleeve, while permitting rotation of the inner sleeve relative to the outer sleeve, when the outer sleeve is secured to the bone elements by the support rods.