Abstract: A fixation device includes an outer member, an inner member, and an expansion member. The outer member includes an elongated body portion and a slotted tail portion, and defines a central bore therethrough that extends along a central longitudinal axis. The inner member is disposed within the central bore of the outer member, and the expansion member is coupled to the inner member. Proximal movement of the inner member relative to the outer member moves the expansion member into the slotted tail portion of the outer member such that the slotted tail portion moves from an undistended configuration to a distended configuration.

Abstract: A pelvic obliquity correction instrument and methods of use are provided. The pelvic obliquity correction instrument includes a first engagement arm for engaging a portion of a spinal fixation system where the first engagement arm is adjustably coupled to a handle assembly. The pelvic obliquity correction instrument also includes a second engagement arm for engaging a second portion of the spinal fixation system. A surgeon exerts force on a first grip at a first end of the handle assembly and a second grip at a second end of the handle assembly to reposition a patient's pelvic bone. The pelvic obliquity correction instrument may provide a surgeon with greater precision, control and torque when rotating a patient's pelvic bone with respect to a superior portion of the patient's spine.