A technique for correcting a bone deformity, such as a bunion, may be performed using an instrument. The technique may include preparing an end of a first metatarsal and preparing an end of a medial cuneiform opposing the end of the first metatarsal. The technique may also include moving the first metatarsal relative to the medial cuneiform. The technique can involve inserting the instrument between a first metatarsal and a second metatarsal.