The purpose of this study is to compare the clinical results between two different techniques for ACDF: 1. Stand-alone ACDF, which means the placement of an interbody device (cage) without anterior fixation or plating; 2. ACDF with and interbody cage and anterior plating for fixation. Both of these procedures are commonly performed at Rush with unclear advantage of one procedure over the other. Both have been associated with good to excellent clinical outcomes. The devices used in this study are approved by the Food and Drug Administration (FDA).