* CT and Biomechanical Analysis of Occipitocervical Stability Afforded by Three Fixation Techniques: Paper #24.Helgeson Melvin D MD; Lehman, Ronald A Jr MD; Sasso, Rick C MD; Dmitriev, Anton E MSc, PhD(c); Mack, Andrew W MDSpine Journal Meeting Abstracts: 2008 - Volume - Issue - ppg 107 Free